两种不同的书写风格。
1.setTimeout(function(){})
2.setTimeout(()=>{})
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Functions</h1>
<h2>setInterval() with a Callback</h2>
<p>Wait 3 seconds (3000 milliseconds) for this page to change.</p>
<h1 id="demo"></h1>
<script>
setTimeout(function(){ myFunction("I love You !!!"); }, 3000);
setTimeout(()=>{myFunction("I'm Michael")},3000);
function myFunction(value) {
document.getElementById("demo").innerHTML += value;
}
</script>
</body>
</html>
代码在线演示。https://bamboobook.w3spaces-preview.com/setTimeout.html