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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 数组方法</h1> 
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<p>删除元素会在数组中留下未定义的孔。</p>
​
<p id="demo1"></p>
<p id="demo2"></p>
​
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML =
"第一种水果是：" + fruits[0];
delete fruits[0];
document.getElementById("demo2").innerHTML =
"第一种水果是：" + fruits[0];
</script>
​
</body>
</html>
​