How does WeChat Mini Programs upload files in batch by ES6 Promise.all?

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WeChat Mini Programs ES6Promise.all batch upload file implementation code

Client

Page ({onLoad: function () {wx.chooseImage ({count: 9, success: function ({tempFilePaths}) {var promise = Promise.all (tempFilePaths.map ((tempFilePath, index) = > {return new Promise (function (resolve, reject) {wx.uploadFile ({url: 'https://www.mengmeitong.com/upload', filePath: tempFilePath) Name: 'photo', formData: {filename:' foo-' + index, index: index}, success: function (res) {resolve (res.data) }, fail: function (err) {reject (new Error ('failed to upload file'));})); promise.then (function (results) {console.log (results);}) .catch (function (err) {console.log (err)) });})

Server side