html运行实例（js_arrow_function

代码示例：（标识：js_arrow_function_5）

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript 箭头函数</h2>

<p>此例展示了，若箭头函数中只有一个参数，则可以省略括号。</p>

<p id="demo"></p>

<script>
var hello;

hello = val => "Hello " + val;

document.getElementById("demo").innerHTML = hello("Universe!");
</script>

</body>
</html>