Simple example code for small program development

Recently I am developing a WeChat applet application. I also started from scratch and sorted out the areas that needed attention during the development process.

this scope

This may not report an error because of the definition when debugging, which makes debugging very troublesome, so pay special attention to it

onLoad: function () {
        var that = this
        wx.request({
            url: 'https://域名/AppService/UserHandler.ashx', 
            data: {
                
            },
            method: 'GET',
            header: {
                'Content-Type': 'application/json'
            },
            success: function (res) {
                that.setData({
                    
                })
            },
            fail: function (res) {

            }
        })
    }

Asynchronous

request is an asynchronous request, so the return value of the same level function, a request, and a get request cannot be obtained. , you need to use the callback function

TLS version

When requesting data, you will be prompted that a TLS version cannot be higher than 1.0, put " "Development environment does not verify the requested domain name and TLS version" check

https

The mini program only supports https bound to the domain name, and in the mini program management interface request for configuration

Global variables

->Definition

//app.js
App({
  onLaunch: function () {

  },
  globalData: {
    userInfo: null
  }
})

->Assignment

//index.js
//获取应用实例
var app = getApp()
Page({
  data: {
    userInfo: {}
  }
})

->Get used

//user.js
//获取应用实例
var app = getApp()
Page({
    // 页面初始数据
    data: {
        userInfo: null
    },
    onLoad: function () {
        this.setData({
            userInfo: getApp().globalData.userInfo,
        })
    }
})

【Related recommendations】

1. Complete source code download of WeChat mini program

2. Chai Ge WeChat mini program application store source code

3. WeChat mini program demo: Yangtao

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