Detect if a PWA is installed (iOS Standalone, Trusted Web App, Chrome PWA)

pwaDetector.js

function isPWA() {
    return window.navigator.standalone == true || // iOS PWA Standalone
        document.referrer.includes('android-app://') || // Android Trusted Web App
        ["fullscreen", "standalone", "minimal-ui"].some(
            (displayMode) => window.matchMedia('(display-mode: ' + displayMode + ')').matches
        ) // Chrome PWA (supporting fullscreen, standalone, minimal-ui)
}

console.log(isPWA()) // true