前端 html input标签 的placeholder属性 标签上显示内容
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div style="width: 600px;margin: auto">
<input type="text" placeholder="请输入关键字">
</div> </body>
</html>
一输入文本内容 没有了
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="x-ua-compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Title</title>
</head>
<body>
<div>
<form>
<div>
<label for="user">用户名:</label>
<input id="user" name="username" type="text" placeholder="请输入用户名">
</div> <div>
<label for="pwd">密码:</label>
<input id="pwd" name="password" type="password" placeholder="请输入密码">
</div>
</form>
</div>
</body>
</html>
