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Use of jQuery selectors and hierarchical selectors

高洛峰Original: 2017-02-28 15:29:331751browse

The example in this article shares the specific implementation code of the jQuery selector for your reference. The specific content is as follows

1. Basic selector

<html>
 <head>
  <meta charset="utf-8">
  <title>jQuery基本选择器</title>
  <script type="text/javascript" src="js/jquery-1.x.js"> </script>
 </head>
 <body>
  <p id="idp">DOM对象与jQuery对象的相互转化</p>
  <p class="classp">jQuery对象不能直接使用DOM对象的方法，</p>
  <p class="classp">但可以通过将jQuery对象转换成DOM对象后再调用其方法。</p>
  <span class="classSpan">基本选择器是jQuery中最常用的选择器</span>
  <script type="text/javascript">
    $(function(e){
      $("#idp").css("color","blue");
      $(".classp").css("background-color","#dddddd");
      $("span").css("background-color","gray").css("color","white");
      $("*").css("font-size","20px");
      $("#idp,.classSpan").css("font-style","italic");
    });
  </script>
 </body>
</html>

2. Level selector

Use of jQuery selectors and hierarchical selectors

<html>
 <head>
  <meta charset="utf-8">
  <title>jQuery层次选择器</title>
  <script type="text/javascript" src="js/jquery-1.x.js"> </script>
 </head>
 <body>
  <p>
    搜索条件<input name="search" />
    <form>
     <label>用户名:</label>
     <input name="useName" />
     <fieldset>
       <label>密　码:</label>
       <input name="password" />
     </fieldset>
    </form>
    <hr/>
    身份证号：<input name="none" /><br/>
    联系电话：<input name="none" />
  </p>
  <script type="text/javascript">
    $(function(e){
      $("form input").css("width","200px");
      $("form > input").css("background","pink");
      $("label + input").css("border-color","blue");
      //$("label").next("input").css("border-color","blue");
      $("form ~ input").css("border-bottom-width","8px");
      //$("form").nextAll("input").css("border-bottom-width","4px");
      $("*").css("padding-top","3px");
    });
  </script>
 </body>
</html>

Effect Picture

Use of jQuery selectors and hierarchical selectors

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