This module provides an interface for the Squirrel auto-updater framework.

Platform notices

Though autoUpdater provides a uniform API for different platforms, there are still some subtle differences on each platform.


On OS X, the autoUpdater module is built upon Squirrel.Mac, meaning you don't need any special setup to make it work. For server-side requirements, you can read Server Support.


On Windows, you have to install your app into a user's machine before you can use the auto-updater, so it is recommended to use grunt-electron-installer module to generate a Windows installer.

The installer generated with Squirrel will create a shortcut icon with an Application User Model ID in the format of com.squirrel.PACKAGE_ID.YOUR_EXE_WITHOUT_DOT_EXE, examples are com.squirrel.slack.Slack and com.squirrel.code.Code. You have to use the same ID for your app with app.setAppUserModelId API, otherwise Windows will not be able to pin your app properly in task bar.

The server-side setup is also different from OS X. You can read the documents of Squirrel.Windows to get more details.


There is not built-in support for auto-updater on Linux, so it is recommended to use the distribution's package manager to update your app.


The autoUpdater object emits the following events:

Event: 'error'


  • error Error

Emitted when there is an error while updating.

Event: 'checking-for-update'

Emitted when checking if an update has started.

Event: 'update-available'

Emitted when there is an available update. The update is downloaded automatically.

Event: 'update-not-available'

Emitted when there is no available update.

Event: 'update-downloaded'


  • event Event
  • releaseNotes String
  • releaseName String
  • releaseDate Date
  • updateURL String

Emitted when an update has been downloaded.

On Windows only releaseName is available.


The autoUpdater object has the following methods:


  • url String

Sets the url and initialize the auto updater. The url cannot be changed once it is set.


Asks the server whether there is an update. You must call setFeedURL before using this API.


Restarts the app and installs the update after it has been downloaded. It should only be called after update-downloaded has been emitted.