BangleApps/js/pwa.js

const divInstall = document.getElementById('installContainer');
const butInstall = document.getElementById('butInstall');


/* Only register a service worker if it's supported */
if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('js/service-worker.js');
}

/**
 * Warn the page must be served over HTTPS
 * The `beforeinstallprompt` event won't fire if the page is served over HTTP.
 * Installability requires a service worker with a fetch event handler, and
 * if the page isn't served over HTTPS, the service worker won't load.
 */
if (window.location.protocol === 'http:') {
    const requireHTTPS = document.getElementById('requireHTTPS');
    const link = requireHTTPS.querySelector('a');
    link.href = window.location.href.replace('http://', 'https://');
    requireHTTPS.classList.remove('hidden');
}