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Use of jQuery selectors and hierarchical selectors

高洛峰
高洛峰Original
2017-02-28 15:29:331763browse

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

Use of jQuery selectors and hierarchical selectors

<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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