表单属性选择器
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="Jquery/jquery-3.4.1.min.js"></script>
</head>
<body>
<script>
$(document).ready(function(){
//enabled选择器
$(':enabled').css('background','red');
//选择器<select>
$(':seletced').css('background','blue');
$(':checked').parent.css('color','yellow');
})
</script>
<form action="" method="">
<label>1<input type="" name=""/><br /></label>
<label>2<input type="" name=""disabled /> <br /></label>
<label>3<input type="" name=""/><br /></label>
<label>4<input type="" name=""/><br /></label>
<select>
<option>1</option>
<option selected="selected">2</option>
<option>3</option>
</select>
<label>游泳<input type="checkbox" checked="checked"/></label>
游泳<input type="checkbox" />
游泳<input type="checkbox" />
</form>
<button>点击</button>
</html>