/***@name getOwnJssData 获取设置data-jss这种方式的数据*@param el*@param needInit*@return {Object} data
/
function getOwnJssData(el,needInit){var data = el.__jssData;if(!data){//匹配上key为data-jss适合在每个标签里面加data-jss=""这种方式var s = el.getAttribute('data-jss');if(s){//进行{}包裹if (!/^\s*{/.test(s)) {s = '{' + s + '}';}//evalExp会把字符串转换成对象 //赋值给data和el.__jssDatadata = el.__jssData =  evalExp(s);             }else if(needInit){data = el.__jssData = {};}}//返回数据对象return data;
}

/***@name getOwnJss *@param el*@param attributeName 指定对应的key为attributeName*@see getOwnJssData*/
getOwnJss:function(el,attributeName){var data = getOwnJssData(el);if(data && (attributeName in data)){return data[attributeName];}return undefined;}

结论：

• getOwnJss只是返回data-jss这种方式的数据，而且是第一个匹配元素的对应数据

/***@name setJss*@param el*@param attributeName*@param attributeValue*@see getOwnJssData*/
setJss:function(el,attributeName,attributeValue){var data = getOwnJssData(el,true);data[attributeName] = attributeValue;}

/***@name removeJss*@param el*@param attributeName*@see getOwnJssData*/
removeJss:function(el,attributeName){var data = getOwnJssData(el);if(data && (attributeName in data)){//采用delete方式删除delete data[attributeName];//返回标志位,true代表删除操作完成return true; }//返回标志位，默认falsereturn false;}

/***@name getJss*@param el*@param attributeName*@see getOwnJssData*@see getRuleData*/
getJss:function(el,attributeName){var data = getOwnJssData(el);if(data && (attributeName in data)){return data[attributeName];}//idvar getRuleData = Jss.getRuleDate,id = el.id;//id是有规范的"#"+idif(id && (data = getRuleData("#" + id)) && (attributeName in data)){return data[attributeName];}   //namevar name = el.name;//name是有规范的"@"+nameif(name && (data = getRuleData("@" + name)) && (attributeName in data)) {return data[attributeName];}//classNamevar className = el.className;//className是有规范的"."+className  if(className){//支持"classNameA classNameB classNameC"var classNames = className.split(" ");for(var i = 0;i<classNames.length;i++){if((data = getRuleData('.'+classNames[i])) && (attributeName in data)){return data[attributeName];}    }}//tagNamevar tagName = el.tagName;if(tagName && (data = getRuleData(tagName)) && (attributeName in data)){return data[attributeName];}return undefined;}

从getJss的设计得出一些结论：

1. 获取的有一定的优先顺序：data-jss >  #id > @name > .className > tagName