babel

问题 Is there a way to provide the path to the .babelrc file to babel-cli? Something like: babel src --out-dir lib --config random-folder/sub-folder/.babelrc 回答1: Considering the version you are using you may try extends or babelrc http://henryzoo.com/babel.github.io/docs/usage/options/ 回答2: You can put the .babelrc file in a shared parent directory of the other 5 modules as the lookup behavior of babel regarding the .babelrc is: Babel will look for a .babelrc in the current directory of the file

问题 Ever since upgrading to the new React Native version my tests are broken. Environment Here is my environment: React Native Environment Info: System: OS: macOS High Sierra 10.13.4 CPU: x64 Intel(R) Core(TM) i7-7920HQ CPU @ 3.10GHz Memory: 486.81 MB / 16.00 GB Shell: 3.2.57 - /bin/bash Binaries: Node: 9.4.0 - /usr/local/bin/node npm: 6.1.0 - /usr/local/bin/npm Watchman: 4.9.0 - /usr/local/bin/watchman SDKs: iOS SDK: Platforms: iOS 11.4, macOS 10.13, tvOS 11.4, watchOS 4.3 IDEs: Android Studio:

问题 I am not able to setup babel correctly for the usage of async / await. I am using babel 7 and webpack 4. I do not want to use babel-polyfill if possible! My babelrc file: { "presets": [[ "@babel/env", {"modules": false} ]], "plugins": [ "syntax-dynamic-import", "transform-async-to-generator" ] } Code: async function init() { const loaderData = await initLoader(); initCmp(loaderData) .then(initApi(loaderData.key)) .catch(); } init(); And Error: refactor.main.js:18 Uncaught ReferenceError:

问题 I have a problem with decorators in React with mobX app. And it works ok with .babelrc , but I also have babel-loader with webpack . I copy babel config to webpack config, but it doesn't work. I checked all solutions that I can found in google, but they all refers to bebelrc , not webpack config. My webpack config: const path = require('path'); const webpack = require('webpack'); module.exports = { devtool: 'cheap-module-eval-source-map', entry: [ 'webpack-hot-middleware/client', 'babel

问题 I am running a React project using npm. After hours of research and experimenting, everywhere says I have to add the following code to my ".babelrc" file, which I do not have in my directory and cannot create: { "plugins": [ ["@babel/plugin-proposal-class-properties", { "loose": true }] ] } But this leads to the following error when I run the code: ERROR in ./src/components/NavBar/Menu.js Module build failed (from ./node_modules/babel-loader/lib/index.js): SyntaxError: /Users/ymoondhra

问题 I'm trying to run a simple node.js file which needs the @babel/preset-env preset. The moment I run the js file, I get a message saying Requires Babel “7.0.0-0” but was loaded with “6.26.3” To replicate the issue, please try the following in a new folder: 1. Run the following commands npm init npm install @babel/register npm install @babel/core@^7.2.2 npm install @babel/preset-env Create a .babelrc file with the following { "presets": ["@babel/preset-env"], "plugins": [] } Create a sample emp

问题 I'm using react-native and react-relay, therefore I've the following .babelrc file: { "sourceMaps": "both", "presets": [ "./plugins/babelRelayPlugin", "react-native" ], "passPerPreset": true } Adding a dependency which uses arrow functions in their components as the MKIconToggle from react-native-material-kit (https://github.com/xinthink/react-native-material-kit) doesn't get transpiled correctly and the this reference is lost/wrong. The original code which ultimately causes the error looks

问题 I'm trying to use javascript ES7 syntax on the server using node.js with webpack and babel-loader (es2015 + stage-0 presets). I've gotten it to work with babel-node but when I run webpack I get the following error at the async keyword (9:22 is after the async keyword): ERROR in ./src/server.js Module parse failed: C:\dev\node-async-sample\src\server.js Unexpected token (9:22) You may need an appropriate loader to handle this file type. SyntaxError: Unexpected token (9:22) I've put the code on

问题 I'm adding language translation support to my project. The code is on Python and has jinja2 in the html files, and Javascript. I'm trying to use Babel to do the translation, but it doesn't recognize the extraction method of jinja2. Maybe I'm using an incorrect name for it. This is my ini file: # Extraction from Python source files [python: **.py] # Extraction from Jinja2 template files [jinja2: **.html] # Extraction from JavaScript files [javascript: **.js] extract_messages = $._, jQuery._

问题 I have error in IE11 SCRIPT1002: Syntax error (problem with class syntax). My simple code with 2 lines: import { struct } from 'superstruct'; console.log('finished'); I wan't that my babel7 compile class into ES5 code I have tried write .babelrc file : { "presets": [ [ "@babel/preset-env", { "targets": { "ie": "11" } } ] ] } and https://babeljs.io/docs/en/babel-plugin-transform-classes haven't fixed too Update : I have tried use @babel/plugin-preset-es2015 which convert class in ES5 code but