servo/tests/wpt/web-platform-tests/common/dispatcher/executor.html

<script src="./dispatcher.js"></script>
<script>

const params = new URLSearchParams(window.location.search);
const uuid = params.get('uuid');

let executeOrders = async function() {
  while(true) {
    let task = await receive(uuid);
    eval(`(async () => {${task}})()`);
  }
};
executeOrders();

</script>