description

# onVisibilityChange property Null safety

Stream<Event> onVisibilityChange
@SupportedBrowser(SupportedBrowser.CHROME), @SupportedBrowser(SupportedBrowser.FIREFOX), @SupportedBrowser(SupportedBrowser.IE, '10')

## Implementation

    @SupportedBrowser(SupportedBrowser.CHROME)
    @SupportedBrowser(SupportedBrowser.FIREFOX)
    @SupportedBrowser(SupportedBrowser.IE, '10')
    Stream<Event> get onVisibilityChange => visibilityChangeEvent.forTarget(this);