tryjsref_indexof_array 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<p id="demo">单击按钮显示“苹果”的位置：</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
    var fruits = ["香蕉", "橙子", "苹果", "甜瓜"];
    var a = fruits.indexOf("苹果")
    var x=document.getElementById("demo");
    x.innerHTML=a;
}
</script>
<p><b>注意:</b>indexOf方法是在JavaScript 1.6中引入的,在IE 8或更早的版本中不可用。</p>
</body>
</html>
 
 
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运行结果
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