html运行实例（js_async_4）-搜寻教程库

代码示例：（标识：js_async_4）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript async / await</h1>

<p>请等待 3 秒（3000 毫秒）让此页面发生变化。</p>

<h1 id="demo"></h1>

<script>
async function myDisplay() {
  let myPromise = new Promise(function(myResolve, myReject) {
    setTimeout(function() { myResolve("I love You !!"); }, 3000);
  });
  document.getElementById("demo").innerHTML = await myPromise;
}

myDisplay();
</script>

</body>
</html>