diff --git a/packages/schema/jupyterwidgetmodels.latest.json b/packages/schema/jupyterwidgetmodels.latest.json
index d84d7c19f3..06eac0adba 100644
--- a/packages/schema/jupyterwidgetmodels.latest.json
+++ b/packages/schema/jupyterwidgetmodels.latest.json
@@ -8,7 +8,7 @@
         "type": "string"
       },
       {
-        "default": "1.1.0",
+        "default": "1.2.0",
         "help": "A semver requirement for namespace version containing the model.",
         "name": "_model_module_version",
         "type": "string"
@@ -26,7 +26,7 @@
         "type": "string"
       },
       {
-        "default": "1.1.0",
+        "default": "1.2.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -229,6 +229,21 @@
         "name": "justify_content",
         "type": "string"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "enum": [
+          "flex-start",
+          "flex-end",
+          "center",
+          "inherit",
+          "initial",
+          "unset"
+        ],
+        "help": "The justify-items CSS attribute.",
+        "name": "justify_items",
+        "type": "string"
+      },
       {
         "allow_none": true,
         "default": null,
@@ -274,56 +289,30 @@
       {
         "allow_none": true,
         "default": null,
-        "help": "The order CSS attribute.",
-        "name": "order",
+        "enum": ["contain", "cover", "fill", "scale-down", "none"],
+        "help": "The object-fit CSS attribute.",
+        "name": "object_fit",
         "type": "string"
       },
       {
         "allow_none": true,
         "default": null,
-        "enum": [
-          "visible",
-          "hidden",
-          "scroll",
-          "auto",
-          "inherit",
-          "initial",
-          "unset"
-        ],
-        "help": "The overflow CSS attribute.",
-        "name": "overflow",
+        "help": "The object-position CSS attribute.",
+        "name": "object_position",
         "type": "string"
       },
       {
         "allow_none": true,
         "default": null,
-        "enum": [
-          "visible",
-          "hidden",
-          "scroll",
-          "auto",
-          "inherit",
-          "initial",
-          "unset"
-        ],
-        "help": "The overflow-x CSS attribute.",
-        "name": "overflow_x",
+        "help": "The order CSS attribute.",
+        "name": "order",
         "type": "string"
       },
       {
         "allow_none": true,
         "default": null,
-        "enum": [
-          "visible",
-          "hidden",
-          "scroll",
-          "auto",
-          "inherit",
-          "initial",
-          "unset"
-        ],
-        "help": "The overflow-y CSS attribute.",
-        "name": "overflow_y",
+        "help": "The overflow CSS attribute.",
+        "name": "overflow",
         "type": "string"
       },
       {
@@ -366,12 +355,12 @@
     "model": {
       "module": "@jupyter-widgets/base",
       "name": "LayoutModel",
-      "version": "1.1.0"
+      "version": "1.2.0"
     },
     "view": {
       "module": "@jupyter-widgets/base",
       "name": "LayoutView",
-      "version": "1.1.0"
+      "version": "1.2.0"
     }
   },
   {
@@ -392,7 +381,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -416,7 +405,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -457,17 +446,31 @@
         "help": "The index of the selected page. This is either an integer selecting a particular sub-widget, or None to have no widgets selected.",
         "name": "selected_index",
         "type": "int"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "AccordionModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "AccordionView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -488,7 +491,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -506,7 +509,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -548,9 +551,23 @@
         "name": "loop",
         "type": "bool"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "b''",
-        "help": "The media data as a byte string.",
+        "help": "The media data as a memory view of bytes.",
         "name": "value",
         "type": "bytes"
       }
@@ -558,12 +575,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "AudioModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "AudioView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -584,7 +601,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -602,7 +619,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -625,13 +642,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -671,6 +681,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0.0,
         "help": "Float value",
@@ -681,12 +705,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "BoundedFloatTextModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatTextView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -707,7 +731,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -725,7 +749,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -748,13 +772,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -793,6 +810,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0,
         "help": "Int value",
@@ -803,12 +834,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "BoundedIntTextModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "IntTextView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -829,7 +860,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -847,7 +878,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -881,17 +912,31 @@
         "name": "layout",
         "type": "reference",
         "widget": "Layout"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "BoxModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "BoxView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -912,7 +957,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -930,7 +975,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -962,7 +1007,7 @@
       },
       {
         "default": "",
-        "help": "Font-awesome icon name, without the 'fa-' prefix.",
+        "help": "Font-awesome icon names, without the 'fa-' prefix.",
         "name": "icon",
         "type": "string"
       },
@@ -981,8 +1026,16 @@
         "widget": "ButtonStyle"
       },
       {
-        "default": "",
-        "help": "Tooltip caption of the button.",
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
         "name": "tooltip",
         "type": "string"
       }
@@ -990,12 +1043,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ButtonModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ButtonView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -1007,7 +1060,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1025,7 +1078,7 @@
         "type": "string"
       },
       {
-        "default": "1.1.0",
+        "default": "1.2.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1053,12 +1106,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ButtonStyleModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/base",
       "name": "StyleView",
-      "version": "1.1.0"
+      "version": "1.2.0"
     }
   },
   {
@@ -1079,7 +1132,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1097,7 +1150,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1114,13 +1167,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes.",
@@ -1147,6 +1193,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": false,
         "help": "Bool value",
@@ -1157,12 +1217,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "CheckboxModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "CheckboxView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -1183,7 +1243,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1201,7 +1261,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1224,13 +1284,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes.",
@@ -1251,6 +1304,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "black",
         "help": "The color value.",
@@ -1261,12 +1328,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ColorPickerModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ColorPickerView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -1287,13 +1354,13 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
       },
       {
-        "default": "ControllerAxisModel",
+        "default": "ComboboxModel",
         "help": "",
         "name": "_model_name",
         "type": "string"
@@ -1305,17 +1372,41 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
       },
       {
-        "default": "ControllerAxisView",
+        "default": "ComboboxView",
         "help": "",
         "name": "_view_name",
         "type": "string"
       },
+      {
+        "default": true,
+        "help": "Update the value as the user types. If False, update on submission, e.g., pressing Enter or navigating away.",
+        "name": "continuous_update",
+        "type": "bool"
+      },
+      {
+        "default": "",
+        "help": "Description of the control.",
+        "name": "description",
+        "type": "string"
+      },
+      {
+        "default": false,
+        "help": "Enable or disable user changes",
+        "name": "disabled",
+        "type": "bool"
+      },
+      {
+        "default": false,
+        "help": "If set, ensure value is in options. Implies continuous_update=False.",
+        "name": "ensure_option",
+        "type": "bool"
+      },
       {
         "default": "reference to new instance",
         "help": "",
@@ -1324,21 +1415,57 @@
         "widget": "Layout"
       },
       {
-        "default": 0.0,
-        "help": "The value of the axis.",
+        "default": [],
+        "help": "Dropdown options for the combobox",
+        "items": {
+          "type": "string"
+        },
+        "name": "options",
+        "type": "array"
+      },
+      {
+        "default": "\u200b",
+        "help": "Placeholder text to display when nothing has been typed",
+        "name": "placeholder",
+        "type": "string"
+      },
+      {
+        "default": "reference to new instance",
+        "help": "Styling customizations",
+        "name": "style",
+        "type": "reference",
+        "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "help": "String value",
         "name": "value",
-        "type": "float"
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
-      "name": "ControllerAxisModel",
-      "version": "1.4.0"
+      "name": "ComboboxModel",
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
-      "name": "ControllerAxisView",
-      "version": "1.4.0"
+      "name": "ComboboxView",
+      "version": "1.5.0"
     }
   },
   {
@@ -1359,13 +1486,13 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
       },
       {
-        "default": "ControllerButtonModel",
+        "default": "ControllerAxisModel",
         "help": "",
         "name": "_model_name",
         "type": "string"
@@ -1377,13 +1504,13 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
       },
       {
-        "default": "ControllerButtonView",
+        "default": "ControllerAxisView",
         "help": "",
         "name": "_view_name",
         "type": "string"
@@ -1396,27 +1523,35 @@
         "widget": "Layout"
       },
       {
-        "default": false,
-        "help": "Whether the button is pressed.",
-        "name": "pressed",
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
         "type": "bool"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0.0,
-        "help": "The value of the button.",
+        "help": "The value of the axis.",
         "name": "value",
         "type": "float"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
-      "name": "ControllerButtonModel",
-      "version": "1.4.0"
+      "name": "ControllerAxisModel",
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
-      "name": "ControllerButtonView",
-      "version": "1.4.0"
+      "name": "ControllerAxisView",
+      "version": "1.5.0"
     }
   },
   {
@@ -1437,13 +1572,13 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
       },
       {
-        "default": "ControllerModel",
+        "default": "ControllerButtonModel",
         "help": "",
         "name": "_model_name",
         "type": "string"
@@ -1455,36 +1590,128 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
       },
       {
-        "default": "ControllerView",
+        "default": "ControllerButtonView",
         "help": "",
         "name": "_view_name",
         "type": "string"
       },
       {
-        "default": [],
-        "help": "The axes on the gamepad.",
-        "items": {
-          "type": "reference",
-          "widget": "Axis"
-        },
-        "name": "axes",
-        "type": "array"
-      },
-      {
-        "default": [],
-        "help": "The buttons on the gamepad.",
-        "items": {
-          "type": "reference",
-          "widget": "Button"
-        },
-        "name": "buttons",
-        "type": "array"
+        "default": "reference to new instance",
+        "help": "",
+        "name": "layout",
+        "type": "reference",
+        "widget": "Layout"
+      },
+      {
+        "default": false,
+        "help": "Whether the button is pressed.",
+        "name": "pressed",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
+      {
+        "default": 0.0,
+        "help": "The value of the button.",
+        "name": "value",
+        "type": "float"
+      }
+    ],
+    "model": {
+      "module": "@jupyter-widgets/controls",
+      "name": "ControllerButtonModel",
+      "version": "1.5.0"
+    },
+    "view": {
+      "module": "@jupyter-widgets/controls",
+      "name": "ControllerButtonView",
+      "version": "1.5.0"
+    }
+  },
+  {
+    "attributes": [
+      {
+        "default": [],
+        "help": "CSS classes applied to widget DOM element",
+        "items": {
+          "type": "string"
+        },
+        "name": "_dom_classes",
+        "type": "array"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_model_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_model_module_version",
+        "type": "string"
+      },
+      {
+        "default": "ControllerModel",
+        "help": "",
+        "name": "_model_name",
+        "type": "string"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_view_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_view_module_version",
+        "type": "string"
+      },
+      {
+        "default": "ControllerView",
+        "help": "",
+        "name": "_view_name",
+        "type": "string"
+      },
+      {
+        "default": [],
+        "help": "The axes on the gamepad.",
+        "items": {
+          "type": "reference",
+          "widget": "Axis"
+        },
+        "name": "axes",
+        "type": "array"
+      },
+      {
+        "default": [],
+        "help": "The buttons on the gamepad.",
+        "items": {
+          "type": "reference",
+          "widget": "Button"
+        },
+        "name": "buttons",
+        "type": "array"
       },
       {
         "default": false,
@@ -1517,22 +1744,36 @@
         "name": "name",
         "type": "string"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
       {
         "default": 0.0,
         "help": "The last time the data from this gamepad was updated.",
         "name": "timestamp",
         "type": "float"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ControllerModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ControllerView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -1553,7 +1794,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1571,7 +1812,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1590,9 +1831,23 @@
         "type": "reference",
         "widget": "Layout"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "b''",
-        "help": "The media data as a byte string.",
+        "help": "The media data as a memory view of bytes.",
         "name": "value",
         "type": "bytes"
       }
@@ -1600,12 +1855,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "DOMWidgetModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": null,
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -1626,7 +1881,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1644,7 +1899,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1661,11 +1916,139 @@
         "name": "description",
         "type": "string"
       },
+      {
+        "default": false,
+        "help": "Enable or disable user changes.",
+        "name": "disabled",
+        "type": "bool"
+      },
+      {
+        "default": "reference to new instance",
+        "help": "",
+        "name": "layout",
+        "type": "reference",
+        "widget": "Layout"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "",
+        "name": "max",
+        "type": "Date"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "",
+        "name": "min",
+        "type": "Date"
+      },
+      {
+        "default": 1,
+        "help": "The date step to use for the picker, in days, or \"any\".",
+        "name": "step",
+        "type": ["int", "string"],
+        "union_attributes": [
+          {
+            "type": "int"
+          },
+          {
+            "enum": ["any"],
+            "type": "string"
+          }
+        ]
+      },
+      {
+        "default": "reference to new instance",
+        "help": "Styling customizations",
+        "name": "style",
+        "type": "reference",
+        "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "allow_none": true,
         "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
+        "help": "",
+        "name": "value",
+        "type": "Date"
+      }
+    ],
+    "model": {
+      "module": "@jupyter-widgets/controls",
+      "name": "DatePickerModel",
+      "version": "1.5.0"
+    },
+    "view": {
+      "module": "@jupyter-widgets/controls",
+      "name": "DatePickerView",
+      "version": "1.5.0"
+    }
+  },
+  {
+    "attributes": [
+      {
+        "default": [],
+        "help": "CSS classes applied to widget DOM element",
+        "items": {
+          "type": "string"
+        },
+        "name": "_dom_classes",
+        "type": "array"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_model_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_model_module_version",
+        "type": "string"
+      },
+      {
+        "default": "DatetimeModel",
+        "help": "",
+        "name": "_model_name",
+        "type": "string"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_view_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_view_module_version",
+        "type": "string"
+      },
+      {
+        "default": "DatetimeView",
+        "help": "",
+        "name": "_view_name",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "help": "Description of the control.",
+        "name": "description",
         "type": "string"
       },
       {
@@ -1681,6 +2064,20 @@
         "type": "reference",
         "widget": "Layout"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "",
+        "name": "max",
+        "type": "Datetime"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "",
+        "name": "min",
+        "type": "Datetime"
+      },
       {
         "default": "reference to new instance",
         "help": "Styling customizations",
@@ -1688,23 +2085,37 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "allow_none": true,
         "default": null,
         "help": "",
         "name": "value",
-        "type": "Date"
+        "type": "Datetime"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
-      "name": "DatePickerModel",
-      "version": "1.4.0"
+      "name": "DatetimeModel",
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
-      "name": "DatePickerView",
-      "version": "1.4.0"
+      "name": "DatetimeView",
+      "version": "1.5.0"
     }
   },
   {
@@ -1716,7 +2127,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1734,7 +2145,7 @@
         "type": "string"
       },
       {
-        "default": "1.1.0",
+        "default": "1.2.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1755,12 +2166,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "DescriptionStyleModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/base",
       "name": "StyleView",
-      "version": "1.1.0"
+      "version": "1.2.0"
     }
   },
   {
@@ -1772,7 +2183,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1790,7 +2201,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1818,12 +2229,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "DirectionalLinkModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": null,
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -1844,7 +2255,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1871,7 +2282,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1888,25 +2299,142 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
-        "help": "Enable or disable user changes",
+        "help": "Enable or disable user changes",
+        "name": "disabled",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Selected index",
+        "name": "index",
+        "type": "int"
+      },
+      {
+        "default": "reference to new instance",
+        "help": "",
+        "name": "layout",
+        "type": "reference",
+        "widget": "Layout"
+      },
+      {
+        "default": "reference to new instance",
+        "help": "Styling customizations",
+        "name": "style",
+        "type": "reference",
+        "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      }
+    ],
+    "model": {
+      "module": "@jupyter-widgets/controls",
+      "name": "DropdownModel",
+      "version": "1.5.0"
+    },
+    "view": {
+      "module": "@jupyter-widgets/controls",
+      "name": "DropdownView",
+      "version": "1.5.0"
+    }
+  },
+  {
+    "attributes": [
+      {
+        "default": [],
+        "help": "CSS classes applied to widget DOM element",
+        "items": {
+          "type": "string"
+        },
+        "name": "_dom_classes",
+        "type": "array"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_model_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_model_module_version",
+        "type": "string"
+      },
+      {
+        "default": "FileUploadModel",
+        "help": "",
+        "name": "_model_name",
+        "type": "string"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_view_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_view_module_version",
+        "type": "string"
+      },
+      {
+        "default": "FileUploadView",
+        "help": "",
+        "name": "_view_name",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "help": "File types to accept, empty string for all",
+        "name": "accept",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "enum": ["primary", "success", "info", "warning", "danger", ""],
+        "help": "Use a predefined styling for the button.",
+        "name": "button_style",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "help": "Description of the control.",
+        "name": "description",
+        "type": "string"
+      },
+      {
+        "default": false,
+        "help": "Enable or disable button",
         "name": "disabled",
         "type": "bool"
       },
       {
-        "allow_none": true,
-        "default": null,
-        "help": "Selected index",
-        "name": "index",
-        "type": "int"
+        "default": "",
+        "help": "Error message",
+        "name": "error",
+        "type": "string"
+      },
+      {
+        "default": "upload",
+        "help": "Font-awesome icon name, without the 'fa-' prefix.",
+        "name": "icon",
+        "type": "string"
       },
       {
         "default": "reference to new instance",
@@ -1915,23 +2443,49 @@
         "type": "reference",
         "widget": "Layout"
       },
+      {
+        "default": false,
+        "help": "If True, allow for multiple files upload",
+        "name": "multiple",
+        "type": "bool"
+      },
       {
         "default": "reference to new instance",
-        "help": "Styling customizations",
+        "help": "",
         "name": "style",
         "type": "reference",
-        "widget": "DescriptionStyle"
+        "widget": "ButtonStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
+      {
+        "default": [],
+        "help": "The file upload value",
+        "name": "value",
+        "type": "array"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
-      "name": "DropdownModel",
-      "version": "1.4.0"
+      "name": "FileUploadModel",
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
-      "name": "DropdownView",
-      "version": "1.4.0"
+      "name": "FileUploadView",
+      "version": "1.5.0"
     }
   },
   {
@@ -1952,7 +2506,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -1970,7 +2524,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -1999,13 +2553,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -2063,6 +2610,20 @@
         "type": "reference",
         "widget": "SliderStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 1.0,
         "help": "Float value",
@@ -2073,12 +2634,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatLogSliderModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatLogSliderView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2099,7 +2660,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2117,7 +2678,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2142,13 +2703,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": "reference to new instance",
         "help": "",
@@ -2182,6 +2736,20 @@
         "type": "reference",
         "widget": "ProgressStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0.0,
         "help": "Float value",
@@ -2192,12 +2760,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatProgressModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ProgressView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2218,7 +2786,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2236,7 +2804,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2259,13 +2827,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -2323,6 +2884,20 @@
         "type": "reference",
         "widget": "SliderStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": [0.0, 1.0],
         "help": "Tuple of (lower, upper) bounds",
@@ -2333,12 +2908,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatRangeSliderModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatRangeSliderView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2359,7 +2934,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2377,7 +2952,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2400,13 +2975,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -2464,6 +3032,20 @@
         "type": "reference",
         "widget": "SliderStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0.0,
         "help": "Float value",
@@ -2474,12 +3056,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatSliderModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatSliderView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2500,7 +3082,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2518,7 +3100,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2541,13 +3123,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -2575,6 +3150,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0.0,
         "help": "Float value",
@@ -2585,12 +3174,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatTextModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "FloatTextView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2611,7 +3200,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2629,7 +3218,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2663,17 +3252,31 @@
         "name": "layout",
         "type": "reference",
         "widget": "Layout"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "GridBoxModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "GridBoxView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2694,7 +3297,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2712,7 +3315,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2746,17 +3349,31 @@
         "name": "layout",
         "type": "reference",
         "widget": "Layout"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "HBoxModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "HBoxView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2777,7 +3394,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2795,7 +3412,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2812,13 +3429,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": "reference to new instance",
         "help": "",
@@ -2839,6 +3449,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "",
         "help": "String value",
@@ -2849,12 +3473,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "HTMLMathModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "HTMLMathView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2875,7 +3499,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2893,7 +3517,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -2910,13 +3534,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": "reference to new instance",
         "help": "",
@@ -2937,6 +3554,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "",
         "help": "String value",
@@ -2947,12 +3578,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "HTMLModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "HTMLView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -2973,7 +3604,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -2991,7 +3622,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3010,7 +3641,7 @@
       },
       {
         "default": "",
-        "help": "Height of the image in pixels.",
+        "help": "Height of the image in pixels. Use layout.height for styling the widget.",
         "name": "height",
         "type": "string"
       },
@@ -3021,15 +3652,29 @@
         "type": "reference",
         "widget": "Layout"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "b''",
-        "help": "The media data as a byte string.",
+        "help": "The media data as a memory view of bytes.",
         "name": "value",
         "type": "bytes"
       },
       {
         "default": "",
-        "help": "Width of the image in pixels.",
+        "help": "Width of the image in pixels. Use layout.width for styling the widget.",
         "name": "width",
         "type": "string"
       }
@@ -3037,12 +3682,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ImageModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ImageView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3063,7 +3708,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3081,7 +3726,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3105,13 +3750,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": "reference to new instance",
         "help": "",
@@ -3145,6 +3783,20 @@
         "type": "reference",
         "widget": "ProgressStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0,
         "help": "Int value",
@@ -3155,12 +3807,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "IntProgressModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ProgressView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3181,7 +3833,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3199,7 +3851,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3222,13 +3874,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -3286,6 +3931,20 @@
         "type": "reference",
         "widget": "SliderStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": [0, 1],
         "help": "Tuple of (lower, upper) bounds",
@@ -3296,12 +3955,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "IntRangeSliderModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "IntRangeSliderView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3322,7 +3981,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3340,7 +3999,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3363,13 +4022,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -3427,6 +4079,20 @@
         "type": "reference",
         "widget": "SliderStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0,
         "help": "Int value",
@@ -3437,12 +4103,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "IntSliderModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "IntSliderView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3463,7 +4129,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3481,7 +4147,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3504,13 +4170,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -3531,11 +4190,25 @@
         "type": "int"
       },
       {
-        "default": "reference to new instance",
-        "help": "Styling customizations",
-        "name": "style",
-        "type": "reference",
-        "widget": "DescriptionStyle"
+        "default": "reference to new instance",
+        "help": "Styling customizations",
+        "name": "style",
+        "type": "reference",
+        "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       },
       {
         "default": 0,
@@ -3547,12 +4220,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "IntTextModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "IntTextView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3573,7 +4246,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3591,7 +4264,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3608,13 +4281,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": "reference to new instance",
         "help": "",
@@ -3635,6 +4301,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "",
         "help": "String value",
@@ -3645,12 +4325,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "LabelModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "LabelView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3662,7 +4342,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3680,7 +4360,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3708,12 +4388,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "LinkModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": null,
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3734,7 +4414,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3752,7 +4432,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3775,13 +4455,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -3808,6 +4481,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "",
         "help": "String value",
@@ -3818,12 +4505,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "PasswordModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "PasswordView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3844,7 +4531,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3855,18 +4542,6 @@
         "name": "_model_name",
         "type": "string"
       },
-      {
-        "default": false,
-        "help": "Whether the control is currently playing.",
-        "name": "_playing",
-        "type": "bool"
-      },
-      {
-        "default": false,
-        "help": "Whether the control will repeat in a continous loop.",
-        "name": "_repeat",
-        "type": "bool"
-      },
       {
         "default": "@jupyter-widgets/controls",
         "help": "",
@@ -3874,7 +4549,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -3891,13 +4566,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -3906,7 +4574,7 @@
       },
       {
         "default": 100,
-        "help": "The maximum value for the play control.",
+        "help": "The time between two animation steps (ms).",
         "name": "interval",
         "type": "int"
       },
@@ -3929,6 +4597,18 @@
         "name": "min",
         "type": "int"
       },
+      {
+        "default": false,
+        "help": "Whether the control is currently playing.",
+        "name": "playing",
+        "type": "bool"
+      },
+      {
+        "default": false,
+        "help": "Whether the control will repeat in a continous loop.",
+        "name": "repeat",
+        "type": "bool"
+      },
       {
         "default": true,
         "help": "Show the repeat toggle button in the widget.",
@@ -3948,6 +4628,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": 0,
         "help": "Int value",
@@ -3958,12 +4652,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "PlayModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "PlayView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -3975,7 +4669,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -3993,7 +4687,7 @@
         "type": "string"
       },
       {
-        "default": "1.1.0",
+        "default": "1.2.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4021,12 +4715,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ProgressStyleModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/base",
       "name": "StyleView",
-      "version": "1.1.0"
+      "version": "1.2.0"
     }
   },
   {
@@ -4047,7 +4741,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4074,7 +4768,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4091,13 +4785,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -4124,17 +4811,31 @@
         "name": "style",
         "type": "reference",
         "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "RadioButtonsModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "RadioButtonsView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -4155,7 +4856,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4182,7 +4883,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4199,13 +4900,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -4238,17 +4932,31 @@
         "name": "style",
         "type": "reference",
         "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -4269,7 +4977,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4296,7 +5004,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4313,13 +5021,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -4354,17 +5055,31 @@
         "name": "style",
         "type": "reference",
         "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectMultipleModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectMultipleView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -4385,7 +5100,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4412,7 +5127,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4435,13 +5150,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -4480,17 +5188,31 @@
         "name": "style",
         "type": "reference",
         "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectionRangeSliderModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectionRangeSliderView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -4511,7 +5233,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4538,7 +5260,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4561,13 +5283,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -4606,17 +5321,31 @@
         "name": "style",
         "type": "reference",
         "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectionSliderModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "SelectionSliderView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -4628,7 +5357,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4646,40 +5375,150 @@
         "type": "string"
       },
       {
-        "default": "1.1.0",
+        "default": "1.2.0",
+        "help": "",
+        "name": "_view_module_version",
+        "type": "string"
+      },
+      {
+        "default": "StyleView",
+        "help": "",
+        "name": "_view_name",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "help": "Width of the description to the side of the control.",
+        "name": "description_width",
+        "type": "string"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Color of the slider handle.",
+        "name": "handle_color",
+        "type": "string"
+      }
+    ],
+    "model": {
+      "module": "@jupyter-widgets/controls",
+      "name": "SliderStyleModel",
+      "version": "1.5.0"
+    },
+    "view": {
+      "module": "@jupyter-widgets/base",
+      "name": "StyleView",
+      "version": "1.2.0"
+    }
+  },
+  {
+    "attributes": [
+      {
+        "default": [],
+        "help": "CSS classes applied to widget DOM element",
+        "items": {
+          "type": "string"
+        },
+        "name": "_dom_classes",
+        "type": "array"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_model_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_model_module_version",
+        "type": "string"
+      },
+      {
+        "default": "StackedModel",
+        "help": "",
+        "name": "_model_name",
+        "type": "string"
+      },
+      {
+        "default": {},
+        "help": "Titles of the pages",
+        "name": "_titles",
+        "type": "object"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_view_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
       },
       {
-        "default": "StyleView",
-        "help": "",
-        "name": "_view_name",
-        "type": "string"
+        "default": "StackedView",
+        "help": "",
+        "name": "_view_name",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "enum": ["success", "info", "warning", "danger", ""],
+        "help": "Use a predefined styling for the box.",
+        "name": "box_style",
+        "type": "string"
+      },
+      {
+        "default": [],
+        "help": "List of widget children",
+        "items": {
+          "type": "reference",
+          "widget": "Widget"
+        },
+        "name": "children",
+        "type": "array"
+      },
+      {
+        "default": "reference to new instance",
+        "help": "",
+        "name": "layout",
+        "type": "reference",
+        "widget": "Layout"
+      },
+      {
+        "allow_none": true,
+        "default": 0,
+        "help": "The index of the selected page. This is either an integer selecting a particular sub-widget, or None to have no widgets selected.",
+        "name": "selected_index",
+        "type": "int"
       },
       {
-        "default": "",
-        "help": "Width of the description to the side of the control.",
-        "name": "description_width",
-        "type": "string"
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
       },
       {
         "allow_none": true,
         "default": null,
-        "help": "Color of the slider handle.",
-        "name": "handle_color",
+        "help": "A tooltip caption.",
+        "name": "tooltip",
         "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
-      "name": "SliderStyleModel",
-      "version": "1.4.0"
+      "name": "StackedModel",
+      "version": "1.5.0"
     },
     "view": {
-      "module": "@jupyter-widgets/base",
-      "name": "StyleView",
-      "version": "1.1.0"
+      "module": "@jupyter-widgets/controls",
+      "name": "StackedView",
+      "version": "1.5.0"
     }
   },
   {
@@ -4700,7 +5539,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4724,7 +5563,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4765,17 +5604,31 @@
         "help": "The index of the selected page. This is either an integer selecting a particular sub-widget, or None to have no widgets selected.",
         "name": "selected_index",
         "type": "int"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "TabModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "TabView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -4796,7 +5649,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4814,7 +5667,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4837,13 +5690,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -4870,6 +5716,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "",
         "help": "String value",
@@ -4880,12 +5740,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "TextModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "TextView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -4906,7 +5766,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -4924,7 +5784,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -4947,13 +5807,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -4987,6 +5840,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "",
         "help": "String value",
@@ -4997,12 +5864,147 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "TextareaModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "TextareaView",
-      "version": "1.4.0"
+      "version": "1.5.0"
+    }
+  },
+  {
+    "attributes": [
+      {
+        "default": [],
+        "help": "CSS classes applied to widget DOM element",
+        "items": {
+          "type": "string"
+        },
+        "name": "_dom_classes",
+        "type": "array"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_model_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_model_module_version",
+        "type": "string"
+      },
+      {
+        "default": "TimeModel",
+        "help": "",
+        "name": "_model_name",
+        "type": "string"
+      },
+      {
+        "default": "@jupyter-widgets/controls",
+        "help": "",
+        "name": "_view_module",
+        "type": "string"
+      },
+      {
+        "default": "1.5.0",
+        "help": "",
+        "name": "_view_module_version",
+        "type": "string"
+      },
+      {
+        "default": "TimeView",
+        "help": "",
+        "name": "_view_name",
+        "type": "string"
+      },
+      {
+        "default": "",
+        "help": "Description of the control.",
+        "name": "description",
+        "type": "string"
+      },
+      {
+        "default": false,
+        "help": "Enable or disable user changes.",
+        "name": "disabled",
+        "type": "bool"
+      },
+      {
+        "default": "reference to new instance",
+        "help": "",
+        "name": "layout",
+        "type": "reference",
+        "widget": "Layout"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "",
+        "name": "max",
+        "type": "Time"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "",
+        "name": "min",
+        "type": "Time"
+      },
+      {
+        "default": 60,
+        "help": "The time step to use for the picker, in seconds, or \"any\".",
+        "name": "step",
+        "type": ["float", "string"],
+        "union_attributes": [
+          {
+            "type": "float"
+          },
+          {
+            "enum": ["any"],
+            "type": "string"
+          }
+        ]
+      },
+      {
+        "default": "reference to new instance",
+        "help": "Styling customizations",
+        "name": "style",
+        "type": "reference",
+        "widget": "DescriptionStyle"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "",
+        "name": "value",
+        "type": "Time"
+      }
+    ],
+    "model": {
+      "module": "@jupyter-widgets/controls",
+      "name": "TimeModel",
+      "version": "1.5.0"
+    },
+    "view": {
+      "module": "@jupyter-widgets/controls",
+      "name": "TimeView",
+      "version": "1.5.0"
     }
   },
   {
@@ -5023,7 +6025,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -5041,7 +6043,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -5065,13 +6067,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes.",
@@ -5099,8 +6094,16 @@
         "widget": "DescriptionStyle"
       },
       {
-        "default": "",
-        "help": "Tooltip caption of the toggle button.",
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
         "name": "tooltip",
         "type": "string"
       },
@@ -5114,12 +6117,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ToggleButtonModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ToggleButtonView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -5140,7 +6143,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -5167,7 +6170,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -5192,13 +6195,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes",
@@ -5235,6 +6231,20 @@
         "type": "reference",
         "widget": "ToggleButtonsStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": [],
         "help": "Tooltips for each button.",
@@ -5248,12 +6258,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ToggleButtonsModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ToggleButtonsView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -5265,7 +6275,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -5283,7 +6293,7 @@
         "type": "string"
       },
       {
-        "default": "1.1.0",
+        "default": "1.2.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -5316,12 +6326,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ToggleButtonsStyleModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/base",
       "name": "StyleView",
-      "version": "1.1.0"
+      "version": "1.2.0"
     }
   },
   {
@@ -5342,7 +6352,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -5360,7 +6370,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -5394,17 +6404,31 @@
         "name": "layout",
         "type": "reference",
         "widget": "Layout"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "VBoxModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "VBoxView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -5425,7 +6449,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -5443,7 +6467,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -5460,13 +6484,6 @@
         "name": "description",
         "type": "string"
       },
-      {
-        "allow_none": true,
-        "default": null,
-        "help": "Tooltip for the description (defaults to description).",
-        "name": "description_tooltip",
-        "type": "string"
-      },
       {
         "default": false,
         "help": "Enable or disable user changes.",
@@ -5493,6 +6510,20 @@
         "type": "reference",
         "widget": "DescriptionStyle"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": false,
         "help": "Bool value",
@@ -5503,12 +6534,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "ValidModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "ValidView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -5529,7 +6560,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_model_module_version",
         "type": "string"
@@ -5547,7 +6578,7 @@
         "type": "string"
       },
       {
-        "default": "1.4.0",
+        "default": "1.5.0",
         "help": "",
         "name": "_view_module_version",
         "type": "string"
@@ -5595,9 +6626,23 @@
         "name": "loop",
         "type": "bool"
       },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
+      },
       {
         "default": "b''",
-        "help": "The media data as a byte string.",
+        "help": "The media data as a memory view of bytes.",
         "name": "value",
         "type": "bytes"
       },
@@ -5611,12 +6656,12 @@
     "model": {
       "module": "@jupyter-widgets/controls",
       "name": "VideoModel",
-      "version": "1.4.0"
+      "version": "1.5.0"
     },
     "view": {
       "module": "@jupyter-widgets/controls",
       "name": "VideoView",
-      "version": "1.4.0"
+      "version": "1.5.0"
     }
   },
   {
@@ -5687,6 +6732,20 @@
         },
         "name": "outputs",
         "type": "array"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "Is widget tabbable?",
+        "name": "tabbable",
+        "type": "bool"
+      },
+      {
+        "allow_none": true,
+        "default": null,
+        "help": "A tooltip caption.",
+        "name": "tooltip",
+        "type": "string"
       }
     ],
     "model": {
diff --git a/packages/schema/jupyterwidgetmodels.latest.md b/packages/schema/jupyterwidgetmodels.latest.md
index 4b75dd3c52..5545306c1c 100644
--- a/packages/schema/jupyterwidgetmodels.latest.md
+++ b/packages/schema/jupyterwidgetmodels.latest.md
@@ -346,11 +346,35 @@ Attribute        | Type             | Default          | Help
 `description`    | string           | `''`             | Description of the control.
 `disabled`       | boolean          | `false`          | Enable or disable user changes.
 `layout`         | reference to Layout widget | reference to new instance | 
+`max`            | `null` or Date   | `null`           | 
+`min`            | `null` or Date   | `null`           | 
+`step`           | number (integer) or string (one of `'any'`) | `1`              | The date step to use for the picker, in days, or "any".
 `style`          | reference to DescriptionStyle widget | reference to new instance | Styling customizations
 `tabbable`       | `null` or boolean | `null`           | Is widget tabbable?
 `tooltip`        | `null` or string | `null`           | A tooltip caption.
 `value`          | `null` or Date   | `null`           | 
 
+### DatetimeModel (@jupyter-widgets/controls, 1.5.0); DatetimeView (@jupyter-widgets/controls, 1.5.0)
+
+Attribute        | Type             | Default          | Help
+-----------------|------------------|------------------|----
+`_dom_classes`   | array of string  | `[]`             | CSS classes applied to widget DOM element
+`_model_module`  | string           | `'@jupyter-widgets/controls'` | 
+`_model_module_version` | string           | `'1.5.0'`        | 
+`_model_name`    | string           | `'DatetimeModel'` | 
+`_view_module`   | string           | `'@jupyter-widgets/controls'` | 
+`_view_module_version` | string           | `'1.5.0'`        | 
+`_view_name`     | string           | `'DatetimeView'` | 
+`description`    | string           | `''`             | Description of the control.
+`disabled`       | boolean          | `false`          | Enable or disable user changes.
+`layout`         | reference to Layout widget | reference to new instance | 
+`max`            | `null` or Datetime | `null`           | 
+`min`            | `null` or Datetime | `null`           | 
+`style`          | reference to DescriptionStyle widget | reference to new instance | Styling customizations
+`tabbable`       | `null` or boolean | `null`           | Is widget tabbable?
+`tooltip`        | `null` or string | `null`           | A tooltip caption.
+`value`          | `null` or Datetime | `null`           | 
+
 ### DescriptionStyleModel (@jupyter-widgets/controls, 1.5.0); StyleView (@jupyter-widgets/base, 1.2.0)
 
 Attribute        | Type             | Default          | Help
@@ -1022,6 +1046,28 @@ Attribute        | Type             | Default          | Help
 `tooltip`        | `null` or string | `null`           | A tooltip caption.
 `value`          | string           | `''`             | String value
 
+### TimeModel (@jupyter-widgets/controls, 1.5.0); TimeView (@jupyter-widgets/controls, 1.5.0)
+
+Attribute        | Type             | Default          | Help
+-----------------|------------------|------------------|----
+`_dom_classes`   | array of string  | `[]`             | CSS classes applied to widget DOM element
+`_model_module`  | string           | `'@jupyter-widgets/controls'` | 
+`_model_module_version` | string           | `'1.5.0'`        | 
+`_model_name`    | string           | `'TimeModel'`    | 
+`_view_module`   | string           | `'@jupyter-widgets/controls'` | 
+`_view_module_version` | string           | `'1.5.0'`        | 
+`_view_name`     | string           | `'TimeView'`     | 
+`description`    | string           | `''`             | Description of the control.
+`disabled`       | boolean          | `false`          | Enable or disable user changes.
+`layout`         | reference to Layout widget | reference to new instance | 
+`max`            | `null` or Time   | `null`           | 
+`min`            | `null` or Time   | `null`           | 
+`step`           | number (float) or string (one of `'any'`) | `60`             | The time step to use for the picker, in seconds, or "any".
+`style`          | reference to DescriptionStyle widget | reference to new instance | Styling customizations
+`tabbable`       | `null` or boolean | `null`           | Is widget tabbable?
+`tooltip`        | `null` or string | `null`           | A tooltip caption.
+`value`          | `null` or Time   | `null`           | 
+
 ### ToggleButtonModel (@jupyter-widgets/controls, 1.5.0); ToggleButtonView (@jupyter-widgets/controls, 1.5.0)
 
 Attribute        | Type             | Default          | Help