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Detailed explanation of basic selector usage examples in Jquery_jquery

WBOY
WBOYOriginal
2016-05-16 15:58:221044browse

The examples in this article describe the basic selector usage in Jquery. Share it with everyone for your reference. The details are as follows: 

<!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" />
<title>Jquery 基本选择器</title>
<style type="text/css">
.myDiv{width:100px;background-color:Blue;}      
</style>
<script src="jquery-1.6.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
//JQuery选择器用于查找满足条件的元素。
//基本选择器是JQuery中最常用的选择器,也是最简单的选择器,
//它通过元素id,class和tagName来查找dom元素
//1.$("#id") : id选择器,document.getElementById("id");
//2.$("div") :元素选择器 document.getElementByTagName("div");
//3.$(".myClass") : 类选择器,返回所有class="myClass"的元素
//4.$("*") : 返回所有元素,多用于结合上下文搜索
//5.$("div,span,p.myClass") : 多条件选择器,返回所有查到的元素
$(function () {
  //-----1.id选择器
  //var $divMain = $("#main");
  //alert($divMain.get(0));
  //-----2.元素选择器
  //var $divs = $("div");
  //for (var i = 0; i < $divs.length; i++) {
  //  alert($divs.get(i).innerHTML);
  //}
  //-----3.类选择器
  //var $divs = $(".myDiv");
  //for (var i = 0; i < $divs.length; i++) {
  //  alert($divs.get(i).innerHTML);
  //}
  //-----4.返回所有元素
  //var $Elements = $("*");
  //for (var i = 0; i < $Elements.length; i++) {
  //  alert($Elements.get(i).innerHTML);
  //}
  //-----5.多条件选择器
  var $MyObjs = $("div,input,span");
  for (var i = 0; i < $MyObjs.length; i++) {
    alert($MyObjs.get(i).id);
  }
});
</script>
</head>
<body>
<input id="button1" type="button" value="我是button1" />
<div id="main">
<div id="div1" class="myDiv">我是div1
<span id="span1">我是span1</span>
</div>
<div id="div2" class="myDiv">我是div2
<span id="span2">我是span2</span>
</div>
</div>
<input id="button2" type="button" value="我是button2" />
</body>
</html>

I hope this article will be helpful to everyone’s jQuery programming.

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