Javascript to check if PWA or Mobile Web

Question

I was curious if anyone knew a javascript based method for detecting whether the web experience was being run as a PWA (progressive web app) or it was simply being run as a

Answer 1

Edit 11 Oct 2019: Added an extra switch to check if the app is launched via TWA - document.referrer.includes('android-app://')

This works for all - TWA, Chrome & Safari:

const isInStandaloneMode = () =>
      (window.matchMedia('(display-mode: standalone)').matches) || (window.navigator.standalone) || document.referrer.includes('android-app://');

 if (isInStandaloneMode()) {
    console.log("webapp is installed")
}