简单教程
提交运行
代码编辑器:
E-mail: <input type="email" id="myEmail" maxlength="30"> <p>点击按钮显示 email 字段的 maxlength 属性值</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myEmail").maxLength; document.getElementById("demo").innerHTML = x; } </script>
运行结果: