diff --git a/CHANGES.md b/CHANGES.md
index 74ecef559..90ea60f3f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -3,6 +3,10 @@
 * Add support for the clip-path presentation attribute
 	(#333 by Martin @MBodin Bodin)
 
+* Add support for the `popover` API and for the `name` attribute on
+  `<details>` elements
+  (#341 by @SylvainBoilard)
+
 # 4.6.0
 
 * Update for OCaml 5.0 and drop support for OCaml 4.2.0
diff --git a/lib/html_f.ml b/lib/html_f.ml
index 4e1484f99..308f31594 100644
--- a/lib/html_f.ml
+++ b/lib/html_f.ml
@@ -112,6 +112,7 @@ struct
   let a_onabort = Xml.event_handler_attrib "onabort"
   let a_onafterprint = Xml.event_handler_attrib "onafterprint"
   let a_onbeforeprint = Xml.event_handler_attrib "onbeforeprint"
+  let a_onbeforetoggle = Xml.event_handler_attrib "onbeforetoggle"
   let a_onbeforeunload = Xml.event_handler_attrib "onbeforeunload"
   let a_onblur = Xml.event_handler_attrib "onblur"
   let a_oncanplay = Xml.event_handler_attrib "oncanplay"
@@ -151,6 +152,7 @@ struct
   let a_onsubmit = Xml.event_handler_attrib "onsubmit"
   let a_onsuspend = Xml.event_handler_attrib "onsuspend"
   let a_ontimeupdate = Xml.event_handler_attrib "ontimeupdate"
+  let a_ontoggle = Xml.event_handler_attrib "ontoggle"
   let a_onundo = Xml.event_handler_attrib "onundo"
   let a_onunload = Xml.event_handler_attrib "onunload"
   let a_onvolumechange = Xml.event_handler_attrib "onvolumechange"
@@ -374,6 +376,14 @@ struct
 
   let a_placeholder = string_attrib "placeholder"
 
+  let a_popover x =
+    user_attrib C.string_of_big_variant "popover" x
+
+  let a_popovertarget = string_attrib "popovertarget"
+
+  let a_popovertargetaction x =
+    user_attrib C.string_of_big_variant "popovertargetaction" x
+
   let a_poster = uri_attrib "poster"
 
   let a_preload x =
@@ -1002,6 +1012,7 @@ struct
     | `Yes -> "yes"
     | `No -> "no"
     | `Auto -> "auto"
+    | `Manual -> "manual"
     | `Circle -> "circle"
     | `Poly -> "poly"
     | `Alternate -> "alternate"
@@ -1039,6 +1050,9 @@ struct
     | `Url -> "url"
     | `Text -> "text"
     | `Decimal -> "decimal"
+    | `Hide -> "hide"
+    | `Show -> "show"
+    | `Toggle -> "toggle"
     | `Other s -> s
 
   let string_of_input_type = function
diff --git a/lib/html_sigs.mli b/lib/html_sigs.mli
index 1cf169c8f..d3121d13c 100644
--- a/lib/html_sigs.mli
+++ b/lib/html_sigs.mli
@@ -175,6 +175,7 @@ module type T = sig
   val a_onabort : Xml.event_handler -> [> | `OnAbort] attrib
   val a_onafterprint : Xml.event_handler -> [> | `OnAfterPrint] attrib
   val a_onbeforeprint : Xml.event_handler -> [> | `OnBeforePrint] attrib
+  val a_onbeforetoggle : Xml.event_handler -> [> | `OnBeforeToggle] attrib
   val a_onbeforeunload : Xml.event_handler -> [> | `OnBeforeUnload] attrib
   val a_onblur : Xml.event_handler -> [> | `OnBlur] attrib
   val a_oncanplay : Xml.event_handler -> [> | `OnCanPlay] attrib
@@ -215,6 +216,7 @@ module type T = sig
   val a_onsubmit : Xml.event_handler -> [> | `OnSubmit] attrib
   val a_onsuspend : Xml.event_handler -> [> | `OnSuspend] attrib
   val a_ontimeupdate : Xml.event_handler -> [> | `OnTimeUpdate] attrib
+  val a_ontoggle : Xml.event_handler -> [> | `OnToggle] attrib
   val a_onundo : Xml.event_handler -> [> | `OnUndo] attrib
   val a_onunload : Xml.event_handler -> [> | `OnUnload] attrib
   val a_onvolumechange : Xml.event_handler -> [> | `OnVolumeChange] attrib
@@ -343,6 +345,12 @@ module type T = sig
 
   val a_placeholder : text wrap -> [> | `Placeholder] attrib
 
+  val a_popover : [< | `Auto | `Manual] wrap -> [> | `Popover] attrib
+
+  val a_popovertarget : text wrap -> [> | `Popovertarget] attrib
+
+  val a_popovertargetaction : [< | `Hide | `Show | `Toggle] wrap -> [> | `Popovertargetaction] attrib
+
   val a_poster : Xml.uri wrap -> [> | `Poster] attrib
 
   val a_preload : [< | `None | `Metadata | `Audio] wrap -> [> | `Preload] attrib
diff --git a/lib/html_types.mli b/lib/html_types.mli
index 7ccd3d3cc..2d80c96f5 100644
--- a/lib/html_types.mli
+++ b/lib/html_types.mli
@@ -297,6 +297,9 @@ type core =
     | `Hidden
     | `Id
     | i18n
+    | `Popover
+    | `Popovertarget
+    | `Popovertargetaction
     | `Spellcheck
     | `Style_Attr
     | `Tabindex
@@ -312,6 +315,7 @@ type core =
 type events =
   [
     | `OnAbort
+    | `OnBeforeToggle
     | `OnBlur
     | `OnCanPlay
     | `OnCanPlayThrough
@@ -357,6 +361,7 @@ type events =
     | `OnSubmit
     | `OnSuspend
     | `OnTimeUpdate
+    | `OnToggle
     | `OnTouchStart
     | `OnTouchEnd
     | `OnTouchMove
@@ -2233,7 +2238,7 @@ type details_content = [ | flow5 ]
 
 type details_content_fun = [ | flow5 ]
 
-type details_attrib = [ | common | `Open ]
+type details_attrib = [ | common | `Open | `Name ]
 
 (* NAME: summary, KIND: star, TYPE: [= common ],[= phrasing ], [=`Summary], ARG: [= phrasing ], ATTRIB:  OUT: [=`Summary] *)
 type summary = [ | `Summary ]
@@ -2401,6 +2406,7 @@ type big_variant =
   | `One
   | `Zero
   | `Auto
+  | `Manual
   | `No
   | `Yes
   | `Defer
@@ -2418,6 +2424,9 @@ type big_variant =
   | `Text
   | `Decimal
   | `Search
+  | `Hide
+  | `Show
+  | `Toggle
   ]
 
 type sandbox_token =