专注前端素材！
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>素材8网教程(study.sucai8.cn)</title> </head> <body> <form action="form_action.asp"> 姓名: <input type="text" id="myText" name="fname" required> <input type="submit"> </form> <p>点击 "点我" 按钮查看文本域是否是表单提交的必填部分。</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myText").required; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
运行结果