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Questions tagged [babel-loader]

718 questions
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3 answers

Parser "babylon" deprecated error - webpack build

After I have been upgrading my projects JS packages, an error has appeared when building my bundle with Webpack. It seems to appear when building a .vue-file and can appear on any .vue-file build. I don't have "babylon" in my package.json and I have…
Kris D. J.
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1 answer

Is this webpack warning safe to ignore?

I found a strange warning in webpack. While parsing process.env using babel-loader. A warning(TypeError: result.setExpression is not a function) occurred inwebpack/lib/Parser.js. I'm on a big project and want my core to be super solid. So is it safe…
addlistener
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1 answer

webpack 4 : bundle js not found

I recently upgraded to webpack 4. The page is getting loaded successfully and whenever changes happened it refreshes the page automatically using webpack-dev-server. It does very nice but in the console it shows below error GET…
Hemadri Dasari
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7
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4 answers

Create React Native App. - Plugin/Preset files are not allowed to export objects, only functions

Need some help, I'm getting a weird error out of left field that I have not been able to debug. This project was bundling successfully until yesterday after I setup my react native project on another Mac. I'm wondering if it's from versioning of npm…
hancho
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2 answers

How to get dynamic imports to work in webpack 4

I'm trying to migrate my app to webpack 4. My head hurts already. Dynamic imports - this is my method of code splitting (page by page). But I can't get it to work. Have set up very simple tester with following packages: "devDependencies": { …
Coco
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What is the location of .babelrc file when using create-react-app?

I used create-react-app to build a project and Babel comes packaged with the installation. Usually .babelrc file is located in the root of the project but I don't see one there. I need to modify one of the presets in the file but cannot seem to find…
Nicholas Porter
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4 answers

Migrating from ES5 to TS gradually

I am running on a huge project with thousands of .js files that are written in es5, and for many reasons and benefits of TS, we've decided to start migrating to TS, after a couple of days and many pieces of research, I am going to elaborate a couple…
Abdulrahman Falyoun
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6
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3 answers

Module's not resolving in typescript monorepo with Next.js projects

I have a monorepo using yarn workspaces that has 2 Next.js projects. apps ┣ app-1 ┗ app-2 app-1 needs to import components from app-2. To do this, I add the app-2 project as a dependency and set the path in our app-1 tsconfig like so: app-1…
mattmb
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1 answer

Why does my Create React App Dev Server take so long to start?

I have created a web application in React with Create React App. Somewhere in my development process, the launch time for my development server grew tremendously. It now takes about 8 minutes to launch. I am using Craco to modify my Webpack config…
JeremyEastham
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1 answer

How to use d3.js v7 with jest and babel-loader?

I have some react project that uses d3.js v6.7.0 and I am able to test it with jest 27.2.0 on windows 10. Part of my settings in jest.config.js: testEnvironment: "jsdom", testRunner: "jest-jasmine2", transform: { '^.+\\.jsx?$':…
Stefan
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Jest Test Support for the experimental syntax 'jsx' isn't currently enabled

I am writing first tests for my app and just install Jest. My test is pretty simple, so I don't think the error I am getting is coming from there. import React from 'react'; import renderer from 'react-test-renderer'; import FancyInput from…
vbotio
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6
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2 answers

How to make yarn start work inside Docker image with react-scripts 3.4 and babel-loader 8.1?

I'm building a Docker image for debugging of my React application with a separate Dockerfile FROM node:11-alpine COPY package.json . COPY yarn.lock . RUN yarn install COPY public/ ./public/ COPY src/ ./src/ EXPOSE 3000 CMD yarn run start with…
Kalle Richter
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@babel/runtime: SyntaxError: Unexpected token export @babel/runtime/helpers/esm/extends

two different checkouts of same code resulting in two different versions of @babel/runtime for the same version of babel one version of @babel/runtime is "7.6.3" which contains commonJS module exports but another version of it is "7.9.2" which…
Ashutosh Verma
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1 answer

Webpack and Babel not transpiling a dependency inside node_modules that breaks IE 11 and Edge due to ES6's spread syntax

I have a project that uses @mdx-js/runtime and it completely breaks on IE 11 or Edge (Edge 44.18362.449.0): SCRIPT1028: SCRIPT1028: Expected identifier, string or number It actually breaks because of the spread syntax here: const allNodes =…
Danziger
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1 answer

Babel with NodeJS not working spread operator

I'm using Babel (7.5.0) and NodeJS latest (12.x), so the spread operator is already handled by NodeJS and I don't want babel to mess with it. This is my .babelrc : { "plugins": [ "@babel/plugin-proposal-class-properties", …
HRK44
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