placeholder的使用

HTML5效果

<!DOCTYPE HTML>
<html>
<body>

<form action="/example/html5/demo_form.asp" method="get">
<input type="input" name="user_search" placeholder="Search W3School" />
<input type="submit" />
</form>

</body>
</html>

  

原文地址:https://www.cnblogs.com/thebigdipper/p/3834024.html