面试测试

获取左边的值

var a=$('ul.JS_navCtn').find('a')//选择class等于JS_navCtn的ul节点的后代节点为a标签的节点
var len1=a.length
var arr1=[]
for(var i=0;i<len1;i++){
var obj={}
var key=$(a[i]).text().toString()
var value=$(a[i]).attr('href')
obj[key]=value
arr1.push(obj)
}
JSON.stringify(arr1)//以json的格式存储数据

结果

left.png

"[{"家用电器":"//jiadian.jd.com"},{"手机":"//shouji.jd.com/"},{"运营商":"//wt.jd.com"},{"数码":"//shuma.jd.com/"},{"电脑":"//diannao.jd.com/"},{"办公":"//bg.jd.com"},{"家居":"//channel.jd.com/home.html"},{"家具":"//channel.jd.com/furniture.html"},{"家装":"//channel.jd.com/decoration.html"},{"厨具":"//channel.jd.com/kitchenware.html"},{"男装":"//channel.jd.com/1315-1342.html"},{"女装":"//channel.jd.com/1315-1343.html"},{"童装":"//channel.jd.com/children.html"},{"内衣":"//channel.jd.com/1315-1345.html"},{"美妆个护":"//channel.jd.com/beauty.html"},{"宠物":"//channel.jd.com/pet.html"},{"女鞋":"//channel.jd.com/womensshoes.html"},{"箱包":"//channel.jd.com/bag.html"},{"钟表":"//channel.jd.com/watch.html"},{"珠宝":"//channel.jd.com/jewellery.html"},{"男鞋":"//channel.jd.com/mensshoes.html"},{"运动":"//channel.jd.com/yundongcheng.html"},{"户外":"//channel.jd.com/outdoor.html"},{"汽车":"//car.jd.com/"},{"汽车用品":"//che.jd.com/"},{"母婴":"//baby.jd.com"},{"玩具乐器":"//toy.jd.com/"},{"食品":"//channel.jd.com/food.html"},{"酒类":"//jiu.jd.com"},{"生鲜":"//fresh.jd.com"},{"特产":"//china.jd.com"},{"礼品鲜花":"//channel.jd.com/1672-2599.html"},{"农资绿植":"//nong.jd.com"},{"医药保健":"//health.jd.com"},{"计生情趣":"//channel.jd.com/9192-9196.html"},{"图书":"//book.jd.com/"},{"音像":"//mvd.jd.com/"},{"电子书":"//e.jd.com/ebook.html"},{"机票":"//jipiao.jd.com/"},{"酒店":"//hotel.jd.com/"},{"旅游":"//trip.jd.com/"},{"生活":"//ish.jd.com/"},{"理财":"//licai.jd.com/"},{"众筹":"//z.jd.com/"},{"白条":"//baitiao.jd.com"},{"保险":"//bao.jd.com/"}]"

获取右边的

var len2=$('.cate_pop').find('.cate_detail_tit').length
var brr=[]
for(var i=0;i<len2;i++){

var obj={};//{电视：[{曲面电视：url},{超薄电视:url}]
var key=$($('.cate_pop').find('.cate_detail_tit')[i]).text()
obj[key]=[]
var con=$($('.cate_pop').find('.cate_detail_tit')[i]).siblings('.cate_detail_con').find('.cate_detail_con_lk')
for(var j=0;j<con.length;j++){
var obj1={}
var key1=$(con[j]).text()
obj1[key1]=$(con[j]).attr('href')
obj[key].push(obj1)
}
brr.push(obj)
}

转换成json

数据格式[{电视：[{曲面电视：url},{超薄电视:url}],...},{空调：[{挂壁：url},{座机:url}],...}]

right.png