Jquery 点击按钮自动高亮实现原理及代码

$.extend($.fn, { 
hoverEl:function(){ 

var _this = $(this); 
var _t = setTimeout(function(){ 
_this.attr("hover", "on"); 
}, 10); 
_this.attr("hoverTimeout", _t); 

setTimeout(function(){ 
clearTimeout( _this.attr("hoverTimeout") ); 
var _t = setTimeout(function(){ 
_this.removeAttr("hover"); 
}, 100); 
_this.attr("hoverTimeout", _t); 
},200); 

} 
}); 
 
其次定义样式，当特定attr被加上时 
 代码如下:

li[hover=on]{ 
background-image:-webkit-gradient(linear, 0% 100%, 0% 0%, from(#194FDB), to(#4286F5))!important; 
background-image: -webkit-linear-gradient(top, #4286F5, #194FDB)!important; 
color: white!important; 
cursor: pointer!important; 
} 
 
调用示例： 
 代码如下:

$(e.target).hoverEl();