简单教程
提交运行
代码编辑器:
<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>
运行结果: