x-context-menu

A positioned dropdown overlay that opens on a trigger click. Items are placed in the default slot. The panel auto-flips when it would overflow the viewport.

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Tag

<x-context-menu></x-context-menu>

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Attributes

Attribute	Type	Default	Description
open	boolean	false	Whether the menu is visible
disabled	boolean	false	Disables trigger and interactions
placement	enum	"bottom-start"	Preferred panel placement: bottom-start bottom-end top-start top-end right-start left-start
offset	number	8	Distance in pixels between anchor and panel
z-index	number	1000	CSS z-index of the floating panel

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Properties

Property	Type	Reflects attribute
open	boolean	open
disabled	boolean	disabled
placement	string	placement
offset	number	offset
zIndex	number	z-index

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Events

Event	Cancelable	Detail	Description
x-context-menu-open-request	yes	{ reason }	Fired before opening
x-context-menu-open	no	{ reason }	Fired after opening
x-context-menu-close-request	yes	{ reason }	Fired before closing
x-context-menu-close	no	{ reason }	Fired after closing
x-context-menu-select	no	{ item }	Fired when a menu item is selected

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Slots

Slot	Description
(default)	Menu item elements

Slotted items with role="menuitem" are keyboard-navigable via ArrowUp / ArrowDown and selectable with Enter / Space.

The component does not own a trigger element. Use openAt(x, y) or openForElement(el) to open the menu from your own trigger handler.

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Auto-flip

The panel is positioned using pure DOM geometry. When the preferred placement overflows the viewport, the panel flips to the opposite side. The position is clamped to viewport margins.

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Keyboard

Key	Action
ArrowDown	Focus next menu item
ArrowUp	Focus previous menu item
Enter	Select focused item, close menu
Space	Select focused item, close menu
Escape	Close menu
Tab	Close menu

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Accessibility

• The panel has role="menu".
• Each role="menuitem" item is keyboard navigable.
• Set aria-haspopup="menu" and toggle aria-expanded on your own trigger element in response to the x-context-menu-open and x-context-menu-close events.

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Examples

Basic

<x-context-menu>
  <button slot="trigger">Actions ▾</button>
  <div role="menuitem">Edit</div>
  <div role="menuitem">Duplicate</div>
  <div role="menuitem" style="color:red">Delete</div>
</x-context-menu>

Custom placement

<x-context-menu placement="bottom-end" offset="4">
  <button slot="trigger">⋯</button>
  <div role="menuitem">Rename</div>
  <div role="menuitem">Move</div>
</x-context-menu>

Listening to select

document.querySelector('x-context-menu')
  .addEventListener('x-context-menu-select', e => {
    console.log('selected', e.detail.item);
  });

ClojureScript (hiccup renderer)

[:x-context-menu
 [:button {:slot "trigger"} "Actions ▾"]
 [:div {:role "menuitem"} "Edit"]
 [:div {:role "menuitem"} "Duplicate"]
 [:div {:role "menuitem" :style "color:red"} "Delete"]]