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Table of Contents
Solution:
Step 1 Import and register
Step 2 Encapsulate request
Step 3 Use async await
The native api of the mini program uses async await
Step 1 Encapsulate the native api and use Promise
Step 2 Use
Home WeChat Applet Mini Program Development How to make WeChat applet support async await?

How to make WeChat applet support async await?

Sep 18, 2021 pm 05:02 PM
WeChat applet

WeChat applet does not support async, and it is too uncomfortable to write code.
Various callbacks will cause callback hell problems, callback letters There are layers within layers, making the code difficult to read and difficult to maintain later.

Solution:

Useregenerator-runtime

regenerator- runtime is facebook's regenerator module
After the generator function, async, and await functions are compiled by babel, the regenerator-runtime module is used to provide function implementation.

Introduce packages/regenerator-runtime/runtime.js in facebook/regenerator

Step 1 Import and register

Because it is used globally, all in Introduce it into app.js and register it in the global object.

app.js

import?regeneratorRuntime?from?'./lib/runtime'

App({
????...

????regeneratorRuntime,

????onLaunch(){},

????onShow()?{},

????onHide()?{},

????...
})

Step 2 Encapsulate request

request.js

const?METHOD?=?{
????GET:?'GET',
????POST:?'POST',
????PUT:?'PUT',
????DELETE:?'DELETE'
}

let?baseUrl?=?''
const?interceptors?=?[]

class?Request?{
????/**
?????*?response?interceptor
?????*/
????intercept(res,?resolve,?reject)?{
????????return?interceptors
????????????.filter((f)?=>?typeof?f?===?'function')
????????????.every((f)?=>?f(res,?resolve,?reject))
????}

????/**
?????*?request
?????*/
????request(option)?{
????????const?header?=?{
????????????'content-type':?'application/x-www-form-urlencoded'
????????}
????????const?{?url,?method,?data?=?{}?}?=?option

????????return?new?Promise((resolve,?reject)?=>?{
????????????try?{
????????????????wx.request({
????????????????????url:?baseUrl?+?url,
????????????????????method:?method?||?METHOD.GET,
????????????????????data,
????????????????????header,
????????????????????success:?(res)?=>?this.intercept(res,?resolve,?reject),
????????????????????fail:?(err)?=>?{
????????????????????????if?(
????????????????????????????err?&&
????????????????????????????err.errMsg?&&
????????????????????????????err.errMsg.indexOf('request:fail')?!==?-1
????????????????????????)?{
????????????????????????????console.error('wx?request?error:?',?err)
????????????????????????}?else?{
????????????????????????????wx.showToast({
????????????????????????????????title:?JSON.stringify(err),
????????????????????????????????icon:?'none',
????????????????????????????????duration:?10000
????????????????????????????})
????????????????????????}
????????????????????}
????????????????})
????????????}?catch?(err)?{
????????????????wx.showToast({?title:?err.message,?icon:?'none'?})
????????????}
????????})
????}

????get(url,?data)?{
????????return?this.request({?url,?method:?METHOD.GET,?data?})
????}

????post(url,?data)?{
????????return?this.request({?url,?method:?METHOD.POST,?data?})
????}

????put(url,?data)?{
????????return?this.request({?url,?method:?METHOD.PUT,?data?})
????}

????delete(url,?data)?{
????????return?this.request({?url,?method:?METHOD.DELETE,?data?})
????}

????all(tasks)?{
????????return?Promise.all(tasks)
????}
}

/**
?*?設(shè)置base?URL
?*/
function?setBaseUrl(url)?{
????baseUrl?=?url
}

/**
?*?默認(rèn)response攔截器
?*/
function?addDefaultInterceptor()?{
????interceptors.push((res,?resolve,?reject)?=>?{
????????const?status?=?res.statusCode
????????if?(status?!==?200)?{
????????????return?reject(new?Error(`internet?error:?${status}`))
????????}
????????const?body?=?res.data
????????if?(body.errno?!==?0)?{
????????????return?reject({
????????????????message:?body.error,
????????????????body
????????????})
????????}
????????return?resolve(body.data)
????})
}

const?request?=?new?Request()

export?{?setBaseUrl,?addDefaultInterceptor,?request?}

Step 3 Use async await

For example: 

import?{?request,?setBaseUrl,?addDefaultInterceptor?}?from?'./lib/request'

addDefaultInterceptor()

App({
????...

????async?onLaunch()?{
????????const?userInfo?=?await?request.get('/user/info')
????????console.log(userInfo)
????}

????...
})

The native api of the mini program uses async await

No need to write each Success, fail, etc. callbacks are implemented, and the code is much clearer and more readable.

Step 1 Encapsulate the native api and use Promise

wxp.js

/**
?*?promise微信API方法
?*/
function?wxPromise(api)?{
????function?func(options,?...params)?{
????????return?new?Promise((resolve,?reject)?=>?{
????????????api(
????????????????Object.assign({},?options,?{
????????????????????success:?(res)?=>?{
????????????????????????resolve(res)
????????????????????},
????????????????????fail:?reject
????????????????}),
????????????????...params
????????????)
????????})
????}

????return?func
}

export?default?{
????//?界面交互
????showToast:?wxPromise(wx.showToast),
????showLoading:?wxPromise(wx.showLoading),
????showModal:?wxPromise(wx.showModal),
????showActionSheet:?wxPromise(wx.showActionSheet),
????//?導(dǎo)航條
????setNavigationBarTitle:?wxPromise(wx.setNavigationBarTitle),
????setNavigationBarColor:?wxPromise(wx.setNavigationBarColor),
????setTopBarText:?wxPromise(wx.setTopBarText),
????//?導(dǎo)航
????navigateTo:?wxPromise(wx.navigateTo),
????redirectTo:?wxPromise(wx.redirectTo),
????switchTab:?wxPromise(wx.switchTab),
????reLaunch:?wxPromise(wx.reLaunch),

????//?用戶相關(guān)
????login:?wxPromise(wx.login),
????checkSession:?wxPromise(wx.checkSession),
????authorize:?wxPromise(wx.authorize),
????getUserInfo:?wxPromise(wx.getUserInfo),

????//?支付
????requestPayment:?wxPromise(wx.requestPayment),

????//?圖片
????chooseImage:?wxPromise(wx.chooseImage),
????previewImage:?wxPromise(wx.previewImage),
????getImageInfo:?wxPromise(wx.getImageInfo),
????saveImageToPhotosAlbum:?wxPromise(wx.saveImageToPhotosAlbum),

????//?文件
????uploadFile:?wxPromise(wx.uploadFile),
????downloadFile:?wxPromise(wx.downloadFile),

????//?錄音
????startRecord:?wxPromise(wx.startRecord),

????//?音頻播放
????playVoice:?wxPromise(wx.playVoice),

????//?音樂播放
????getBackgroundAudioPlayerState:?wxPromise(wx.getBackgroundAudioPlayerState),
????playBackgroundAudio:?wxPromise(wx.playBackgroundAudio),
????seekBackgroundAudio:?wxPromise(wx.seekBackgroundAudio),

????//?視頻
????chooseVideo:?wxPromise(wx.chooseVideo),
????saveVideoToPhotosAlbum:?wxPromise(wx.saveVideoToPhotosAlbum),

????//?文件
????saveFile:?wxPromise(wx.saveFile),
????getFileInfo:?wxPromise(wx.getFileInfo),
????getSavedFileList:?wxPromise(wx.getSavedFileList),
????getSavedFileInfo:?wxPromise(wx.getSavedFileInfo),
????removeSavedFile:?wxPromise(wx.removeSavedFile),
????openDocument:?wxPromise(wx.openDocument),

????//?數(shù)據(jù)緩存
????setStorage:?wxPromise(wx.setStorage),
????getStorage:?wxPromise(wx.getStorage),
????getStorageInfo:?wxPromise(wx.getStorageInfo),
????removeStorage:?wxPromise(wx.removeStorage),

????//?位置
????getLocation:?wxPromise(wx.getLocation),
????chooseLocation:?wxPromise(wx.chooseLocation),
????openLocation:?wxPromise(wx.openLocation),

????//?設(shè)備
????getSystemInfo:?wxPromise(wx.getSystemInfo),
????getNetworkType:?wxPromise(wx.getNetworkType),
????startAccelerometer:?wxPromise(wx.startAccelerometer),
????stopAccelerometer:?wxPromise(wx.stopAccelerometer),
????startCompass:?wxPromise(wx.startCompass),
????stopCompass:?wxPromise(wx.stopCompass),
????//?打電話
????makePhoneCall:?wxPromise(wx.makePhoneCall),
????//?掃碼
????scanCode:?wxPromise(wx.scanCode),
????//?剪切板
????setClipboardData:?wxPromise(wx.setClipboardData),
????getClipboardData:?wxPromise(wx.getClipboardData),
????//?藍(lán)牙
????openBluetoothAdapter:?wxPromise(wx.openBluetoothAdapter),
????closeBluetoothAdapter:?wxPromise(wx.closeBluetoothAdapter),
????getBluetoothAdapterState:?wxPromise(wx.getBluetoothAdapterState),
????startBluetoothDevicesDiscovery:?wxPromise(wx.startBluetoothDevicesDiscovery),
????stopBluetoothDevicesDiscovery:?wxPromise(wx.stopBluetoothDevicesDiscovery),
????getBluetoothDevices:?wxPromise(wx.getBluetoothDevices),
????getConnectedBluetoothDevices:?wxPromise(wx.getConnectedBluetoothDevices),
????createBLEConnection:?wxPromise(wx.createBLEConnection),
????closeBLEConnection:?wxPromise(wx.closeBLEConnection),
????getBLEDeviceServices:?wxPromise(wx.getBLEDeviceServices),
????//?iBeacon
????startBeaconDiscovery:?wxPromise(wx.startBeaconDiscovery),
????stopBeaconDiscovery:?wxPromise(wx.stopBeaconDiscovery),
????getBeacons:?wxPromise(wx.getBeacons),
????//?屏幕亮度
????setScreenBrightness:?wxPromise(wx.setScreenBrightness),
????getScreenBrightness:?wxPromise(wx.getScreenBrightness),
????setKeepScreenOn:?wxPromise(wx.setKeepScreenOn),
????//?振動(dòng)
????vibrateLong:?wxPromise(wx.vibrateLong),
????vibrateShort:?wxPromise(wx.vibrateShort),
????//?聯(lián)系人
????addPhoneContact:?wxPromise(wx.addPhoneContact),
????//?NFC
????getHCEState:?wxPromise(wx.getHCEState),
????startHCE:?wxPromise(wx.startHCE),
????stopHCE:?wxPromise(wx.stopHCE),
????sendHCEMessage:?wxPromise(wx.sendHCEMessage),
????//?Wi-Fi
????startWifi:?wxPromise(wx.startWifi),
????stopWifi:?wxPromise(wx.stopWifi),
????connectWifi:?wxPromise(wx.connectWifi),
????getWifiList:?wxPromise(wx.getWifiList),
????setWifiList:?wxPromise(wx.setWifiList),
????getConnectedWifi:?wxPromise(wx.getConnectedWifi),

????//?第三方平臺(tái)
????getExtConfig:?wxPromise(wx.getExtConfig),

????//?轉(zhuǎn)發(fā)
????showShareMenu:?wxPromise(wx.showShareMenu),
????hideShareMenu:?wxPromise(wx.hideShareMenu),
????updateShareMenu:?wxPromise(wx.updateShareMenu),
????getShareInfo:?wxPromise(wx.getShareInfo),

????//?收貨地址
????chooseAddress:?wxPromise(wx.chooseAddress),

????//?卡券
????addCard:?wxPromise(wx.addCard),
????openCard:?wxPromise(wx.openCard),

????//?設(shè)置
????openSetting:?wxPromise(wx.openSetting),
????getSetting:?wxPromise(wx.getSetting),

????//?微信運(yùn)動(dòng)
????getWeRunData:?wxPromise(wx.getWeRunData),

????//?打開小程序
????navigateToMiniProgram:?wxPromise(wx.navigateToMiniProgram),
????navigateBackMiniProgram:?wxPromise(wx.navigateBackMiniProgram),

????//?獲取發(fā)票抬頭
????chooseInvoiceTitle:?wxPromise(wx.chooseInvoiceTitle),

????//?生物認(rèn)證
????checkIsSupportSoterAuthentication:?wxPromise(wx.checkIsSupportSoterAuthentication),
????startSoterAuthentication:?wxPromise(wx.startSoterAuthentication),
????checkIsSoterEnrolledInDevice:?wxPromise(wx.checkIsSoterEnrolledInDevice)
}

The above is the basic api arrangement of the mini program, posted for everyone to use~

Step 2 Use

import?wxp?from?'./lib/wxp'

App({
????...

????wxp,

????async?onLaunch()?{
????????const?res?=?await?wxp.getSystemInfo()
????????console.log(res)
????}

????...
})

Related learning recommendations: 小program development tutorial

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