electron/docs/api/auto-updater.md

autoUpdater

Enable apps to automatically update themselves.

The autoUpdater module provides an interface for the Squirrel framework.

You can quickly launch a multi-platform release server for distributing your application by using one of these projects:

• electron-release-server: A fully featured, self-hosted release server for electron applications, compatible with auto-updater
• squirrel-updates-server: A simple node.js server for Squirrel.Mac and Squirrel.Windows which uses GitHub releases

Platform notices

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

OS X

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.

Note: Your application must be signed for automatic updates on Mac OS X. This is a requirement of Squirrel.Mac.

Windows

On Windows, you have to install your app into a user's machine before you can use the autoUpdater, so it is recommended that you use the electron-winstaller module or the grunt-electron-installer package 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.

Linux

There is no built-in support for auto-updater on Linux, so it is recommended to use the distribution's package manager to update your app.

Events

The autoUpdater object emits the following events:

Event: 'error'

Returns:

• 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'

Returns:

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

Emitted when an update has been downloaded.

On Windows only releaseName is available.

Methods

The autoUpdater object has the following methods:

autoUpdater.setFeedURL(url)

• url String

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

autoUpdater.checkForUpdates()

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

autoUpdater.quitAndInstall()

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