tryjsref_foreach 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>
<button onclick="numbers.forEach(myFunction)">点我</button>
<p id="demo"></p>
<script>
    demoP = document.getElementById("demo");
    var numbers = [4, 9, 16, 25];
    function myFunction(item, index) { 
        demoP.innerHTML = demoP.innerHTML + "index[" + index + "]: "+ item + "</br>";
    }
</script>
</body>
</html>
 
 
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运行结果
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