how to make pwa app installable code example

Example 1: pwa install

buttonInstall.addEventListener('click', (e) => {  // Hide the app provided install promotion  hideMyInstallPromotion();  // Show the install prompt  deferredPrompt.prompt();  // Wait for the user to respond to the prompt  deferredPrompt.userChoice.then((choiceResult) => {    if (choiceResult.outcome === 'accepted') {      console.log('User accepted the install prompt');    } else {      console.log('User dismissed the install prompt');    }  });});

Example 2: How to make PWAs installable js

if('serviceWorker' in navigator) {
    navigator.serviceWorker.register('./pwa-examples/js13kpwa/sw.js');
};