How to delete a style in css

How to delete a style in css: First create an HTML sample file; then add a css style to the div; and finally delete one or more classes from the selected element through the "removeClass()" method.

The operating environment of this tutorial: Windows7 system, HTML5&&CSS3 version, Dell G3 computer.

CSS to add styles and delete styles

The code is as follows:

<style type="text/css">
div{
width:100px;
height:260px;
}
div.whiteborder{
border: 2px white solid;
}
div.redDiv{
background-color: red;
}
div.blueBorder{
border: 5px blue solid;
}
</style>

<script type="text/javascript">
$(function(){
var $divEle = $(&#39;div:first&#39;);
$(&#39;#btn01&#39;).click(function(){
//addClass() - 向被选元素添加一个或多个类
$divEle.addClass(&#39;redDiv blueBorder&#39;);
});
$(&#39;#btn02&#39;).click(function(){
//removeClass() - 从被选元素删除一个或多个类 
$divEle.removeClass();
});
$(&#39;#btn03&#39;).click(function(){
//toggleClass() - 对被选元素进行添加/删除类的切换操作 
$divEle.toggleClass(&#39;redDiv&#39;)
});
$(&#39;#btn04&#39;).click(function(){
//offset() - 返回第一个匹配元素相对于文档的位置。
var pos = $divEle.offset();
console.log(pos);
$divEle.offset({
top:100,
left:50
});
});
})
</script>

Recommended: "css Video tutorial》

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