abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<title>jquery表单选择器</title>
</head>
<body>
<script>
$(document).ready(function(){
// 选择全部可用的元素
$(':enabled').css('background','#666');
// 选择全部不可用的元素
$(':disabled').css('background','#333');
//选择被选中的select元素
$(':selected').css('background','#888');
//
$(':checked').parent().css('color','red')
})
</script>
<input type="text"><hr>
<input type="text"><hr>
<input type="text"><hr>
<input type="text" disabled="disabled"><hr>
<input type="text"><hr>
//老师,这个地方的问题是什么?
<select name="" id="">
<option>1</option>
<option>2</option>
<option selected> 3</option>
</select>
<label for=""><input type="checkbox" checked >1111</label>
<label for=""><input type="checkbox" >2222</label>
<label for=""><input type="checkbox" >3333</label>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2019-06-21 09:28:07
Teacher's summary：<input> 中的name属性不能省略