jquery第二期:三个例子带你走进jquery
jquery是完全支持css的,我们举个例子来看看使用jquery的方便之处,这功劳是属于选择器的:
例1:
[html]
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="jquery-1.10.1.js"></script>
<script type="text/javascript">
$(function()
{
$("li.abc").css("color","red");
});
</script>
</head>
<body>
<div id="hello">
<ul>
<li>niujiabin</li>
<li class="abc">maybe</li>
<li>gossipgo</li>
</ul>
</div>
</body>
</html>
我们想要做到改变maybe字体颜色为红色
[html]
$("li.abc")
利用选择器可以直接获取到,非常方便,如果利用javascript获取就很麻烦
[html]
.css("color","red");
<li>之间的文本就会变成红色
运行结果:
例2:
[html]
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="jquery-1.10.1.js"></script>
<script type="text/javascript">
$(function()
{
$("#hello ul li:even").css("background","grey").css("color","red");
});
</script>
</head>
<body>
<div id="hello">
<ul>
<li>niujiabin</li>
<li class="abc">maybe</li>
<li>gossipgo</li>
</ul>
</div>
</body>
</html>
[html]
$("#hello ul li:even")
选取id为hello下的ul下的li的奇数行。
[html]
<span style="font-size:18px">.css("color","red");</span>
改变奇数行的颜色
运行结果:
例3:
[html]
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
.bg{
background:#f00;
color:#fff;
}
</style>
<script type="text/javascript" src="jquery-1.10.1.js"></script>
<script type="text/javascript">
$(function()
{
$("li").mouseover(setColor).mouseout(setColor);
function setColor()
{
$(this).toggleClass("bg");
}
});
</script>
</head>
<body>
<div id="hello">
<ul>
<li>niujiabin</li>
<li class="abc">maybe</li>
<li>gossipgo</li>
</ul>
</div>
</body>
</html>
[html]
<style type="text/css">
.bg{
background:#f00;
color:#fff;
}
</style>
css样式,设置背景色和颜色
$("li").mouseover(setColor).mouseout(setColor);
为li添加事件
运行结果是鼠标放到哪就会显示变化,离开就会消失。
补充:web前端 , JavaScript ,