How to use Map objects in WeChat applet development

let localMap = new Map(),// 定义一个全局的MAP对象 
typeCode = ''; // 点击分类里面的细分选项卡
handleClickTabs(e) { let id = e.target.dataset.index,
 code = e.target.dataset.id; 
typeCode = code;// 这里定义code，在请求回调里面使用 
this.setData({ leftTab : id }); 
if (localMap!=null) {// map对象 
let list = localMap.get(typeCode);//获取对应分类的type的code 
if (list!=null) {//map里面有值，渲染页面 
this.setData({ tabSonList:list }) }else {//map里面没有值，去请求接口 const data = { goodsTypeCode: code }; 
utils.sendRequest(api.ClassifySon, data, this.handleGoodsSon.bind(this)); }
 }else { const data = { goodsTypeCode: code }; 
utils.sendRequest(api.ClassifySon, data, this.handleGoodsSon.bind(this)); } }, //分类里面的内容 handleGoodsSon(res) { let list = res.data; localMap.set(typeCode,list)//存对应typeCode的list 
this.setData({ tabSonList:list }) },

In this way, the optimization of the tab will be reassigned if the interface data becomes too much. Although I am adding drama to myself, this is also my work attitude. I have learned new things and optimized the project.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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