WeChat applet example: How to get the user's openid (with code)

The content of this article is about the WeChat applet example: how to obtain the user's openid (with code). It has certain reference value. Friends in need can refer to it. I hope It will help you.

openid is the user’s unique identifier in the mini program. The method of obtaining it is as follows:

Mini program operation: app.js

App({
   onLaunch: function () {
    // 登录
    wx.login({
      success: res => {
        // 发送 res.code 到后台换取 openId, sessionKey, unionId
        wx.request({
          url: '后台接口',
          data: {
            code: res.code
          },
          success: function (res) {
           
          },
          fail: function (err) {
            
          }
        })
      }
    })  
  }
})

Background operation:

For detailed operations, please see the official documentation

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