JavaScript学习笔记8-jQuery层次选择器深度解析

最新推荐文章于 2020-05-17 08:49:08 发布

原创最新推荐文章于 2020-05-17 08:49:08 发布 · 450 阅读

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本文深入探讨了CSS选择器的基础知识，通过实例演示如何使用基本选择器改变网页元素的样式，包括ID选择器、类选择器、相邻选择器、同辈选择器等，并展示了如何在实际网页中应用这些选择器。

层次选择器

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

 <link rel="stylesheet" type="text/css" href="style.css" /> 

 <script type="text/javascript" src="jquery-1.4.4.js"></script>

  <script type="text/javascript">

  $(document).ready(function()
  {
	$("#button1").click(function()
	{
		$('body div').css("background", "red");
	});

	$("#button2").click(function()
	{
		$('body > div').css("background", "blue");
	});

	$("#button3").click(function()
	{
		//$('.one + div').css("background", "green");
		$('.one').next('div').css("background", "green");
	});

	$("#button4").click(function()
	{
		//$("#two ~ div").css("background", "orange");
		//$('#two').nextAll('div').css("background", "orange");
		$('#two').siblings('div').css("background", "orange");
	});


  });
  </script>
</head>
<body>

 <h3>基本选择器.</h3>
 
<input type="button" value="test1" id="button1">
<input type="button" value="test2" id="button2">
<input type="button" value="test3" id="button3">
<input type="button" value="test4" id="button4">


   <div class="one" id="one" >
 id为one,class为one的div
      <div class="mini">class为mini</div>
  </div>

    <div class="one"  id="two" title="test" >
	 id为two,class为one,title为test的div.
      <div class="mini"  title="other">class为mini,title为other</div>
      <div class="mini"  title="test">class为mini,title为test</div>
  </div>

  <div class="one">
      <div class="mini">class为mini</div>
      <div class="mini">class为mini</div>
	  <div class="mini">class为mini</div>
	  <div class="mini"></div>
  </div>
  <div class="one">
      <div class="mini">class为mini</div>
      <div class="mini">class为mini</div>
	  <div class="mini">class为mini</div>
	  <div class="mini"  title="tesst">class为mini,title为tesst</div>
  </div>
  <div style="display:none;"  class="none">style的display为"none"的div</div>
  
  <div class="hide">class为"hide"的div</div>
 
  <div>
  包含input的type为"hidden"的div<input type="hidden" size="8"/>
  </div>

</body>
</html>