<!DOCTYPE html>
<html>
<body>
<h1>JavaScript 数组</h1>
<p>Array.shift() 方法删除数组的第一项。</p>
<p id="demo"></p>
<script>
const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.shift();
document.getElementById("demo").innerHTML = fruits;
</script>
</body>
</html>