简单教程
提交运行
代码编辑器：
<form action="/dy/html/getpost"> 周: <input type="week" id="myWeek" name="week_year" required> <input type="submit"> </form> <p>点击 "点我" 按钮查看在表单提交前 week 字段是否为必填字段</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myWeek").required; document.getElementById("demo").innerHTML = x; } </script>
运行结果：