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Home > List of blog posts > jq 选择器，#id .class element 和 parent>p prev+next prev~siblings
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jq 选择器，#id .class element 和 parent>p prev+next prev~siblings
张浩刚
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815 people have browsed it
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <meta http-equiv="X-UA-Compatible" content="ie=edge">
  7.     <title>Document</title>
  8.     <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
  9. </head>
  10. <body>
  11.     <div class="one" id='red'>div1 div1</div>
  12.     <div class="two" id='blue'>div2 div2</div>
  13.     <p id='f'>fff</p>
  14.     <div class="three" id='gray'>
  15.         <p id='a'>aaa</p>
  16.         <p id='b'>bbb</p>
  17.         <p id='c'><span>ccc</span></p>
  18.         <p id='d'>ddd</p>
  19.     </div>
  20.     <p id='e'>eee</p>
  21.     <p id='h'>hhh</p>
  22.     <p id='i'>iii</p>
  23.     <script>
  24.         console.log( $('#red') ); // 通过 #id 调出div1
  25.         console.log($('.two')); //通过 .class调出div2
  26.         console.log($('p'));  // element 调出全局p 5个
  27.         console.log($('div')); // element 调出全局div 共3个
  28.         ////////////////////////////////
  29.         console.log($('div p')); //全局div下所有p，包含子级和孙子级
  30.         console.log($('#gray p')); //调用id为gray下的所有p，包含子级和孙子级
  31.         console.log($('.three p')); //调用class为three下的所有p，包含子级和孙子级
  32.         ////////////////////////////////
  33.         console.log($('div>p')); //全局div下所有子级p
  34.         console.log($('#gray>p')); //调用id为gray下的子级p
  35.         console.log($('.three>p')); //调用class为three下的子级p
  36.         ////////////////////////////////
  37.         console.log($('div + p')); //全局div后面的平级p
  38.         console.log($('.three + p')); //class为three的后面的相邻平级p;
  39.         console.log($('#gray ~ p')); // #gray的后后面的所有平级p
  40.     </script>
  41. </body>
  42. </html>
Correction status：Uncorrected

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