required修改默认提示 :
1 <form action="abc.php">
2 <input type="text" required oninvalid="setCustomValidity('写点东西')" >
3 <input type="submit" value="提交">
4 </form>
required修改默认提示 :
1 <form action="abc.php">
2 <input type="text" required oninvalid="setCustomValidity('写点东西')" >
3 <input type="submit" value="提交">
4 </form>