knockout.contextmenu

To bind a context menu to an element:

<td data-bind="contextmenu: { 'Option 1': $root.rootMethod, 'Option 2': itemMethod, 'Option 3': anotherMethod }">

You can also bind a boolean observable to the context menu, that will work as a 'check':

contextmenu: { 
    Boolean: someObservableBoolean, 
    'One method': $root.test 
}

You can also set dynamic 'text' and 'visible' values binding an object with the following values instead of a method:

text (optional): Set menu text. visible (optional): Show/hide item (result must be boolean). action (mandatory): Item method.

Example:

contextmenu: { 
    'Complex item': { text: $root.someObservableText(), visible: someMethod() == '1', action: $root.someAction }, 
    'One method': $root.test
}

To create a separator between two menus, just create an object with the property separator with true:

contextmenu: { 
    'Some item': methodOne,
    'Separator': { separator: true, visible: someMethod() },
    'Just another item': methodTwo
}