Target.type() method
Identifies what kind of target this is.
Signature:type(): 'page' | 'background_page' | 'service_worker' | 'shared_worker' | 'other' | 'browser' | 'webview';
'page' | 'background_page' | 'service_worker' | 'shared_worker' | 'other' | 'browser' | 'webview'
Remarks
See docs for more info about background pages.