Closes the app without prompting the user. To the user, it appears as though the app has crashed.
Syntaxvar retval = window.close();
This method has no parameters.
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
There are no standards that apply here.
When a function fired by an event on any object calls the close method, the window.close method is implied.
When an event on any object calls the close method, the document.close method is implied.
<button onclick="close();"> Click this button and document.close() is called. </button>
It is against Windows Store policy to programmatically close your app. The only time an app should programmatically close is when there is an unrecoverable error, in which case the app should throw an unhandled exception or use the MSApp.terminateApp method.
In you use window.close, it appears as a crash to the user is logged as a crash in the developer’s telemetry data on the Windows Store dashboard.