Cloud flare worker lazy load js

lazy-load.js

addEventListener("fetch", event => {
    event.respondWith(handle(event.request));
});

const urls = {
   'certificate': 'https://static.eventials.com/evCertificate/assets/ev-certificates.$HASH.js'
}

const hashes = {
   'certificate': '79fa861b49cdc1a2f7aa'
}

function makeURL(component) {
  return urls[component].replace('$HASH', hashes[component])
}

function makeScript(url) {
    return `(function() {
    var script = document.createElement('script');
    script.src = '$URL';
    document.head.appendChild(script);
  })();`.replace('$URL', url)
}

function makeScriptAndURL(component) {
    return makeScript(makeURL(component))
}

async function handle(request) {
  const queryString = new URL(request.url).searchParams.get('name')

  var scripts = ['(function(){})();']

  if (queryString) {
      const components = queryString.split(',')

      components.forEach((name) => {
        if (name in urls) {
            scripts.push(makeScriptAndURL(name))
        }
      });
  }

  return new Response(scripts.join(''))
}