babeljs

问题 When creating a standard vue app (using vue-cli v3.0) and including @feathersjs/feathers in order to implement a connection with a feathers API, I get an error with Internet Explorer 11 ( SCRIPT1010: Expected identifier ) The bottom line is to find an easy way to solve issues like this, because on bigger projects one could easily find lots of library issues and sometimes is necessary to support at least one version of Internet Explorer (at least from the business point of view) I read on

问题 Recently i have implemented Webpack 4 setup for my react app. My webpack.config.js looks like this const HtmlWebPackPlugin = require('html-webpack-plugin'); const htmlWebpackPlugin = new HtmlWebPackPlugin({ template: './src/index.js', filename: './index.html', }); module.exports = { module: { rules: [ { test: /\.js$/, exclude: /node_modules/, use: { loader: 'babel-loader', }, }, { test: /\.css$/, use: [ { loader: 'style-loader', }, { loader: 'css-loader', options: { modules: true,

问题 UPDATE: In terminal I see this file has "-rw-r--r--". What command do I need to run in order to change this to the right permission? I'm trying to run react-native run-ios and I keep getting the error shown below: return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode); ^ Error: EACCES: permission denied, open '/Users/sharatakasapu/Desktop/projects/albums/node_modules/.cache/@babel/register/.babel.7.2.2.development.json' at Object.fs.openSync (fs.js:646:18) at Object.fs

问题 has anyone been writing jasmine / jest tests using es2015 syntax? how much shimming / polyfill / gerrymandering does it require? i’m having trouble importing functions correctly. i have one module: …./utils/TweetUtils.js 'use strict'; export function getListOfTweetIds (tweets) { return Object.keys(tweets); }; and one test suite: …./__tests__/TweetUtils-test.js 'use strict'; jest.dontMock('../TweetUtils'); import * as TweetUtils from '../TweetUtils'; describe('Tweet utilities module', () => {

问题 has anyone been writing jasmine / jest tests using es2015 syntax? how much shimming / polyfill / gerrymandering does it require? i’m having trouble importing functions correctly. i have one module: …./utils/TweetUtils.js 'use strict'; export function getListOfTweetIds (tweets) { return Object.keys(tweets); }; and one test suite: …./__tests__/TweetUtils-test.js 'use strict'; jest.dontMock('../TweetUtils'); import * as TweetUtils from '../TweetUtils'; describe('Tweet utilities module', () => {

问题 has anyone been writing jasmine / jest tests using es2015 syntax? how much shimming / polyfill / gerrymandering does it require? i’m having trouble importing functions correctly. i have one module: …./utils/TweetUtils.js 'use strict'; export function getListOfTweetIds (tweets) { return Object.keys(tweets); }; and one test suite: …./__tests__/TweetUtils-test.js 'use strict'; jest.dontMock('../TweetUtils'); import * as TweetUtils from '../TweetUtils'; describe('Tweet utilities module', () => {

问题 I'm having a hard time understanding why there are some issues with the following code https://jsfiddle.net/q4w6e3n3/3/ Note: All examples are tested in chrome version 52.0.2743.116 just in case this helps const model = { someVal: 'some val', }; const obs = { ...model, get accessor() { return this.someVal; }, } // Expected: '>>> some val' // Actual: '>>> undefined' console.log('>>>', obs.accessor); But the following similar snippet works https://jsfiddle.net/q4w6e3n3/5/ const model = {

问题 This is what I have, using ExpressJS: |-- app | |-- index.js |-- node_modules | |-- babel-core | |-- babel-loader | |-- babel-preset-react | |-- express | |-- react | |-- react-dom | |-- webpack |-- public | |-- js | | |-- app.js | |-- index.html |-- .babelrc |-- index.js |-- package.json |-- webpack.config.js /webpack.config.js module.exports = { entry: [ './app/index.js' ], module: { loaders: [{ test: /\.js$/, include: __dirname + '/app', loader: "babel-loader", query: { presets:['react'] }

问题 This code beforeEach(() => { this.asd= '123'; this.sdf= '234'; this.dfg= '345'; this.fgh= '456'; }); has been transpiled by Babel to: beforeEach(function() { undefined.asd= '123'; undefined.sdf= '234'; undefined.dfg= '345'; undefined.fgh= '456'; }); Why? 回答1: Presumably that code is at the top-level scope of a module, and so it's in strict mode (the default for modules is strict mode), or a file that is being evaluated in strict mode (because it has "use strict" or because of Babel's defaults

问题 This code beforeEach(() => { this.asd= '123'; this.sdf= '234'; this.dfg= '345'; this.fgh= '456'; }); has been transpiled by Babel to: beforeEach(function() { undefined.asd= '123'; undefined.sdf= '234'; undefined.dfg= '345'; undefined.fgh= '456'; }); Why? 回答1: Presumably that code is at the top-level scope of a module, and so it's in strict mode (the default for modules is strict mode), or a file that is being evaluated in strict mode (because it has "use strict" or because of Babel's defaults