菜鸟学堂
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源代码
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟学堂()</title> </head> <body> <p>点击按钮列出数组的每个元素。</p> <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>
运行结果
在线运行
菜鸟学堂 edu.jb51.net