<!DOCTYPE html>
<html>
<body>
<h2>JavaScript 箭头函数</h2>
<p>此例展示了箭头函数的语法以及如何使用它。</p>
<p id="demo"></p>
<script>
var hello;
hello = () => {
return "Hello World!";
}
document.getElementById("demo").innerHTML = hello();
</script>
</body>
</html>