Questions tagged [babel-core]
37 questions
53
votes
1 answer
babel vs babel-core vs babel-loader vs babel-preset-2015 vs babel-preset-react vs babel-polyfill
I was setting up Webpack for my React project and got confused between babel, babel-core, babel-loader, babel-preset-2015 and babel-preset-react. I know that Babel is needed to transform ES7 or ES6 code to ES5 but in my package.json I have installed…
ankita.gulati
- 829
- 7
- 14
21
votes
4 answers
babel@7 and jest configuration
Maybe you may help me?
I try to configure jest to use babel@7
So I have:
"jest": "^23.4.1",
"@babel/core": "^7.0.0-beta.54",
"babel-7-jest": "^21.3.3",
"babel-jest": "^20.0.3",
And jest config inside package.json
"jest": {
"transform": {
…
SilentImp
- 1,473
- 1
- 14
- 27
6
votes
1 answer
Babel throws a type error when exporting aggregates
When running my gulp task, I get the following error:
SyntaxError in plugin "gulp-babel"
Message:
/Users/******/Repos/******/src/scripts/config/index.js: Unexpected export specifier type
> 1 | export * as constants from './constants';
…
Paulos3000
- 2,717
- 7
- 30
- 63
5
votes
0 answers
What are some ways to override local babelrc configurations?
I have a .babelrc file with certain configurations that I want to override in select situations (not environment-related). Unfortunately, babel documentation is not very clear on order of precedence for configs that are passed(i.e., .babelrc,…
Hammy1409
- 61
- 2
4
votes
0 answers
@babel/core Jest error: Must export a default export when using ES6 modules
Running Jest throws this error for a simple test file:
Must export a default export when using ES6 modules.
at createDescriptor (node_modules/@babel/core/lib/config/config-descriptors.js:170:13)
at items.map…
Friendly-Robot
- 1,036
- 8
- 21
4
votes
2 answers
Error: listen EADDRINUSE when using nodemon with babel 7
nodemon -v: 1.18.6
node -v: v11.2.0
Command: nodemon --exec babel-node lib/server.js
My app starts ok with the above command. When I change the source code, I expect the nodemon restart automatically. But I got the error Error: listen EADDRINUSE:…
Long Tran
- 843
- 8
- 10
3
votes
2 answers
Can not transform code with babel transform with config file
This is the config file:
{
"presets": [
"@babel/preset-env"
],
"plugins": [
"@babel/plugin-transform-modules-commonjs"
]
}
This is the command:
npx babel src/* --out-dir build
The CLI output is
src/script.js ->…
tscpp
- 687
- 7
- 26
3
votes
1 answer
Babel plugin development for react-intl
I noticed that there are some performance gain opportunities for react-intl after comparing intl.formatMessage({ id: 'section.someid' }) vs intl.messages['section.someid'].
See more here: https://github.com/yahoo/react-intl/issues/1044
The second is…
Gustavo Huffenbacher Daud
- 175
- 2
- 9
3
votes
1 answer
Use Babel Transform inside of React code
I'm trying to convert a string to valid JSX code, and then inject it into my React component.
const babel = require('babel-core')
let result = eval(babel.transform('
Hello
').code) But am getting hit with a wall of errors,…
Ben
- 3,987
- 6
- 30
- 47
3
votes
1 answer
Using babel-polyfill in production entry file
I'm using babel to transpile ES7 js code, and everything works like a charm in dev/staging. Inside the application, I heavily rely on async/await features of ES7. My entry file looks like this:
'use…
Ivan
- 709
- 4
- 14
2
votes
0 answers
Module build failed: Error: Cannot find module 'babel-core' at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
Module build failed: Error: Cannot find module 'babel-core'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
sharing package.json file
"dependencies": {
"babel-loader": "^7.1.5",
"cli-color": "^2.0.0",
…
anu
- 31
- 2
2
votes
1 answer
react native bundling failed: Error: Requires Babel "^7.0.0-0", but was loaded with "6.26.3"
I get an error when using Expo in my react native app. When importing the following line of code. (Only part of my code where I use the import 'expo')
import {Permissions, ImagePicker} from 'expo';
I get an error. I'm all day searching for a…
Wiezalditzijn
- 131
- 9
2
votes
1 answer
I am getting a 404 error on my new Reactjs app, is it looking for a main.js file?
This app should be rendering what I have here (/Users/ldco2016/Projects/reactquiz/src/components/App.jsx:
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
class App extends Component{
render(){
return(
…
Daniel
- 9,020
- 8
- 63
- 101
1
vote
1 answer
Parcel build failed, showing babel error "Do not clone comments tha...... } could not be cloned"
I am getting following error when I was trying to create a build using parceljs. It is showing some babel file while creating build using parcel:
yarn run v1.22.5
$ parcel build app.html -d static
…
Gsmalhotra
- 11
- 1
1
vote
0 answers
Yarn --link-duplicates creates error while building
I run yarn install --link-duplicates in order to install packages. I get the following error
NOENT: no such file or directory, lstat '/.../front/node_modules/@svgr/webpack/node_modules/@babel/core/node_modules
The node_modules doesn't exist in the…
MAnast
- 51
- 6