electron/docs/api/menu.md

## Class: Menu

> Create native application menus and context menus.

Process: [Main](../glossary.md#main-process)

### `new Menu()`

Creates a new menu.

### Static Methods

The `menu` class has the following static methods:

#### `Menu.setApplicationMenu(menu)`

* `menu` Menu | null

Sets `menu` as the application menu on macOS. On Windows and Linux, the
`menu` will be set as each window's top menu.

Also on Windows and Linux, you can use a `&` in the top-level item name to
indicate which letter should get a generated accelerator. For example, using
`&File` for the file menu would result in a generated `Alt-F` accelerator that
opens the associated menu. The indicated character in the button label gets an
underline. The `&` character is not displayed on the button label.

Passing `null` will remove the menu bar on Windows and Linux but has no
effect on macOS.

**Note:** This API has to be called after the `ready` event of `app` module.

#### `Menu.getApplicationMenu()`

Returns `Menu | null` - The application menu, if set, or `null`, if not set.

**Note:** The returned `Menu` instance doesn't support dynamic addition or
removal of menu items. [Instance properties](#instance-properties) can still
be dynamically modified.

#### `Menu.sendActionToFirstResponder(action)` _macOS_

* `action` String

Sends the `action` to the first responder of application. This is used for
emulating default macOS menu behaviors. Usually you would use the
[`role`](menu-item.md#roles) property of a [`MenuItem`](menu-item.md).

See the [macOS Cocoa Event Handling Guide](https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/EventOverview/EventArchitecture/EventArchitecture.html#//apple_ref/doc/uid/10000060i-CH3-SW7)
for more information on macOS' native actions.

#### `Menu.buildFromTemplate(template)`

* `template` MenuItemConstructorOptions[]

Returns `Menu`

Generally, the `template` is an array of `options` for constructing a
[MenuItem](menu-item.md). The usage can be referenced above.

You can also attach other fields to the element of the `template` and they
will become properties of the constructed menu items.

### Instance Methods

The `menu` object has the following instance methods:

#### `menu.popup(options)`

* `options` Object (optional)
  * `window` [BrowserWindow](browser-window.md) (optional) - Default is the focused window.
  * `x` Number (optional) - Default is the current mouse cursor position.
    Must be declared if `y` is declared.
  * `y` Number (optional) - Default is the current mouse cursor position.
    Must be declared if `x` is declared.
  * `positioningItem` Number (optional) _macOS_ - The index of the menu item to
    be positioned under the mouse cursor at the specified coordinates. Default
    is -1.
  * `callback` Function (optional) - Called when menu is closed.

Pops up this menu as a context menu in the [`BrowserWindow`](browser-window.md).

#### `menu.closePopup([browserWindow])`

* `browserWindow` [BrowserWindow](browser-window.md) (optional) - Default is the focused window.

Closes the context menu in the `browserWindow`.

#### `menu.append(menuItem)`

* `menuItem` [MenuItem](menu-item.md)

Appends the `menuItem` to the menu.

#### `menu.getMenuItemById(id)`

* `id` String

Returns `MenuItem` the item with the specified `id`

#### `menu.insert(pos, menuItem)`

* `pos` Integer
* `menuItem` [MenuItem](menu-item.md)

Inserts the `menuItem` to the `pos` position of the menu.

### Instance Events

Objects created with `new Menu` emit the following events:

**Note:** Some events are only available on specific operating systems and are
labeled as such.

#### Event: 'menu-will-show'

Returns:

* `event` Event

Emitted when `menu.popup()` is called.

#### Event: 'menu-will-close'

Returns:

* `event` Event

Emitted when a popup is closed either manually or with `menu.closePopup()`.

### Instance Properties

`menu` objects also have the following properties:

#### `menu.items`

A `MenuItem[]` array containing the menu's items.

Each `Menu` consists of multiple [`MenuItem`](menu-item.md)s and each `MenuItem`
can have a submenu.

### Instance Events

Objects created with `new Menu` or returned by `Menu.buildFromTemplate` emit
the following events:

## Examples

The `Menu` class is only available in the main process, but you can also use it
in the render process via the [`remote`](remote.md) module.

### Main process

An example of creating the application menu in the main process with the
simple template API:

```javascript
const { app, Menu } = require('electron')

const template = [
  {
    label: 'Edit',
    submenu: [
      { role: 'undo' },
      { role: 'redo' },
      { type: 'separator' },
      { role: 'cut' },
      { role: 'copy' },
      { role: 'paste' },
      { role: 'pasteandmatchstyle' },
      { role: 'delete' },
      { role: 'selectall' }
    ]
  },
  {
    label: 'View',
    submenu: [
      { role: 'reload' },
      { role: 'forcereload' },
      { role: 'toggledevtools' },
      { type: 'separator' },
      { role: 'resetzoom' },
      { role: 'zoomin' },
      { role: 'zoomout' },
      { type: 'separator' },
      { role: 'togglefullscreen' }
    ]
  },
  {
    role: 'window',
    submenu: [
      { role: 'minimize' },
      { role: 'close' }
    ]
  },
  {
    role: 'help',
    submenu: [
      {
        label: 'Learn More',
        click () { require('electron').shell.openExternal('https://electronjs.org') }
      }
    ]
  }
]

if (process.platform === 'darwin') {
  template.unshift({
    label: app.getName(),
    submenu: [
      { role: 'about' },
      { type: 'separator' },
      { role: 'services', submenu: [] },
      { type: 'separator' },
      { role: 'hide' },
      { role: 'hideothers' },
      { role: 'unhide' },
      { type: 'separator' },
      { role: 'quit' }
    ]
  })

  // Edit menu
  template[1].submenu.push(
    { type: 'separator' },
    {
      label: 'Speech',
      submenu: [
        { role: 'startspeaking' },
        { role: 'stopspeaking' }
      ]
    }
  )

  // Window menu
  template[3].submenu = [
    { role: 'close' },
    { role: 'minimize' },
    { role: 'zoom' },
    { type: 'separator' },
    { role: 'front' }
  ]
}

const menu = Menu.buildFromTemplate(template)
Menu.setApplicationMenu(menu)
```

### Render process

Below is an example of creating a menu dynamically in a web page
(render process) by using the [`remote`](remote.md) module, and showing it when
the user right clicks the page:

```html
<!-- index.html -->
<script>
const { remote } = require('electron')
const { Menu, MenuItem } = remote

const menu = new Menu()
menu.append(new MenuItem({ label: 'MenuItem1', click() { console.log('item 1 clicked') } })))
menu.append(new MenuItem({ type: 'separator' }))
menu.append(new MenuItem({ label: 'MenuItem2', type: 'checkbox', checked: true }))

window.addEventListener('contextmenu', (e) => {
  e.preventDefault()
  menu.popup({ window: remote.getCurrentWindow() })
}, false)
</script>
```


## Notes on macOS Application Menu

macOS has a completely different style of application menu from Windows and
Linux. Here are some notes on making your app's menu more native-like.

### Standard Menus

On macOS there are many system-defined standard menus, like the `Services` and
`Windows` menus. To make your menu a standard menu, you should set your menu's
`role` to one of the following and Electron will recognize them and make them
become standard menus:

* `window`
* `help`
* `services`

### Standard Menu Item Actions

macOS has provided standard actions for some menu items, like `About xxx`,
`Hide xxx`, and `Hide Others`. To set the action of a menu item to a standard
action, you should set the `role` attribute of the menu item.

### Main Menu's Name

On macOS the label of the application menu's first item is always your app's
name, no matter what label you set. To change it, modify your app bundle's
`Info.plist` file. See
[About Information Property List Files][AboutInformationPropertyListFiles]
for more information.

## Setting Menu for Specific Browser Window (*Linux* *Windows*)

The [`setMenu` method][setMenu] of browser windows can set the menu of certain
browser windows.

## Menu Item Position

You can make use of `before`, `after`, `beforeGroupContaining`, `afterGroupContaining` and `id` to control how the item will be placed when building a menu with `Menu.buildFromTemplate`.

* `before` - Inserts this item before the item with the specified label. If the
  referenced item doesn't exist the item will be inserted at the end of
  the menu. Also implies that the menu item in question should be placed in the same “group” as the item.
* `after` - Inserts this item after the item with the specified label. If the
  referenced item doesn't exist the item will be inserted at the end of
  the menu. Also implies that the menu item in question should be placed in the same “group” as the item.
* `beforeGroupContaining` - Provides a means for a single context menu to declare
  the placement of their containing group before the containing group of the item with the specified label.
* `afterGroupContaining` - Provides a means for a single context menu to declare
  the placement of their containing group after the containing group of the item with the specified label.

By default, items will be inserted in the order they exist in the template unless one of the specified positioning keywords is used.

### Examples

Template:

```javascript
[
  { id: '1', label: 'one' },
  { id: '2', label: 'two' },
  { id: '3', label: 'three' },
  { id: '4', label: 'four' }
]
```

Menu:

```sh
- 1
- 2
- 3
- 4
```

Template:

```javascript
[
  { id: '1', label: 'one' },
  { type: 'separator' },
  { id: '3', label: 'three', beforeGroupContaining: ['1'] },
  { id: '4', label: 'four', afterGroupContaining: ['2'] },
  { type: 'separator' },
  { id: '2', label: 'two' }
]
```

Menu:

```sh
- 3
- 4
- ---
- 1
- ---
- 2
```

Template:

```javascript
[
  { id: '1', label: 'one', after: ['3'] },
  { id: '2', label: 'two', before: ['1'] },
  { id: '3', label: 'three' }
]
```

Menu:

```sh
- ---
- 3
- 2
- 1
```

[AboutInformationPropertyListFiles]: https://developer.apple.com/library/ios/documentation/general/Reference/InfoPlistKeyReference/Articles/AboutInformationPropertyListFiles.html
[setMenu]: https://github.com/electron/electron/blob/master/docs/api/browser-window.md#winsetmenumenu-linux-windows