abstract：<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>選擇器練習(xí)</title> <script type="text/javascript" src="jquery-3.3.1.min.js">
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>選擇器練習(xí)</title>
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>
</head>
<body>
<script type="text/javascript">
$(document).ready(function(){
$(":text").css("background-color","red");
})
</script>
<form >
用戶名: <input type="text" name="user"><br>
密碼: <input type="password" name="password"><br>
<button type="button">按鈕</button>
</body>
</html>
Correcting teacher：天蓬老師Correction time：2018-12-25 13:06:11
Teacher's summary：在這個(gè)案例中, 推薦在偽類前加上其它標(biāo)識符,例如id