Fired when the browser stops displaying a menu: for example because the user clicked outside it or selected an item.
It is only triggered for menus that can be manipulated using the
menus
API itself: this includes the context menu, the browser's tools menu, and the bookmarks menu.
This is most likely to be used in combination with the
menus.onShown
and
menus.refresh()
APIs: an extension can update the menu when it is shown, then undo the changes when it is hidden.
Firefox makes this event available via the
contextMenus
namespace as well as the
menus
名称空间。
browser.menus.onHidden.addListener(listener)
浏览器
.
menus
.
onHidden
.
removeListener
(
listener
)
浏览器
.
menus
.
onHidden
.
hasListener
(
listener
)
Events have three functions:
addListener(listener)
Adds a listener to this event.
removeListener(listener)
Stop listening to this event. The
listener
argument is the listener to remove.
hasListener(listener)
校验是否
listener
is registered for this event. Returns
true
if it is listening,
false
否则。
callback
Function that will be called when this event occurs. The function will be passed no parameters.
BCD tables only load in the browser
This example just logs a message whenever a menu is hidden:
function hidden() {
console.log("Menu was hidden");
}
browser.menus.onHidden.addListener(hidden);
最后修改： , 由 MDN 贡献者