themeSource

A string property that can be system, light or dark. It is used to override and supersede the value that Chromium has chosen to use internally.

Setting this property to system will remove the override and everything will be reset to the OS default. By default themeSource is system.

Settings this property to dark will have the following effects:

• nativeTheme.shouldUseDarkColors will be true when accessed

• Any UI Electron renders on Linux and Windows including context menus, devtools, etc. will use the dark UI.

• Any UI the OS renders on macOS including menus, window frames, etc. will use the dark UI.

• The prefers-color-scheme CSS query will match dark mode.

• The updated event will be emitted

Settings this property to light will have the following effects:

• nativeTheme.shouldUseDarkColors will be false when accessed

• Any UI Electron renders on Linux and Windows including context menus, devtools, etc. will use the light UI.

• Any UI the OS renders on macOS including menus, window frames, etc. will use the light UI.

• The prefers-color-scheme CSS query will match light mode.

• The updated event will be emitted

The usage of this property should align with a classic "dark mode" state machine in your application where the user has three options.

• Follow OS -->themeSource = 'system'

• Dark Mode -->themeSource = 'dark'

• Light Mode -->themeSource = 'light'

Your application should then always use shouldUseDarkColors to determine what CSS to apply.