jquery内容的展开与折叠

时间 2019-12-06 标签 jquery 内容展开折叠

$(function(){
var slideHeight = 10; // 默认显示的高度
var defHeight = $('#wrap').height();//原本应有的高度
if(defHeight >= slideHeight){//页面加载进入
$('#wrap').css('height' , slideHeight + 'px');
$('#read-more').append('<a href="#">点击查看更多。。</a>');
$('#read-more a').click(function(){
var curHeight = $('#wrap').height();
if(curHeight == slideHeight){
$('#wrap').animate({//动态延长高度
height: defHeight
}, "normal");
$('#read-more a').html('点击隐藏');
$('#gradient').fadeOut();//那条线淡出
}else{
$('#wrap').animate({
height: slideHeight
}, "normal");
$('#read-more a').html('点击查看更多。。');
$('#gradient').fadeIn();//那条线淡入
}
return false;
});
}

});css

<body>
<div id="container">
<h1>jQuery 控制段落文字展开折叠，点击查看更多的功能
<h2>About Billabong</h2>
<div id="wrap">
<div>
<p>Gordon developed his own stitching technique, which made the garments more durable, cost effective and less labor intensive. He employed machinists, moved the operation into a factory, set up a distribution network and sponsored a team of renowned Australian surfers. The business thrived.</p>
<p>Since those beginnings, Billabong has expanded its product range to include boardsport products such as wetsuits, watches, surfboards, snowboard outerwear and skateboarding apparel.</p>
</div>
<div id="gradient"></div>
</div>
<div id="read-more"></div>
</div>
</body>
</html>
html

css:app

html,body,div,h2,p{margin: 0;padding: 0;}
html{font: 1em Arial, Helvetica, sans-serif;color: #444;}
a{color: #0087f1;}
p{margin-bottom: 5px;}
#container{margin: 0 auto;width: 600px;}
#container h2{font-size: 20px;color: #0087f1;}
#wrap{position: relative;padding: 10px;overflow: hidden;} ---- 主要样式
#gradient{width: 100%;height: 35px;background: url() repeat-x;position: absolute;bottom: 0;left: 0;}
#read-more{padding: 5px;border-top: 4px double #ddd;background: #fff;color: #333;}
#read-more a{padding-right: 22px;background: url() no-repeat 100% 50%;font-weight: bold;text-decoration: none;}
#read-more a: hover{color: #000;}
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