即使在安装应用程序之后，`beforeinstallprompt` 事件也会触发

Question

I'm showing a custom PWA install popup to the user using beforeinstallprompt event before showing the native install popup. For some of our users, who already installed the PWA to their desktop, are getting the custom popup again. The only way for that happening is that the beforeinstallprompt event is firing again. Is that possible?

Will browser fire beforeinstallprompt event even when PWA is installed to the user system?

Issues are reported for Google Chrome.

Answer 1

Actually, I came across this issue today. Hope I'm not late to the party. Anyway, what I did was that I listened to the event fired when a user has successfully accepted the installation of the "app" then I hid the custom install button. This is because chrome automatically launches the installed "app".

Actually, before showing the user the button to install your app, check if the app was first launched via the app itself or directly from the browser using:

 if(windows.matchMedia.("(display-mode:standalone)").matches)
{
    //do not show the button
}.

Hope this helps.