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Module not found error even when overriding webpack config

When running npm run build I'm getting Module not found error. The extension in the request is mandatory for it to be fully specified.
This is relating to a shared package I created using create-react-library. This lib is being referenced in a new project using the latest create-react-app.
I have created a config-overrides.js file setting fullySpecified to false but this does not seem to have any affect.
Any idea what I am missing?
Module not found: Error: Can't resolve './utils' in
'C:\Users\Bob\source\repos\my-react-app\node_modules#my-lib\shared\dist\services'
Did you mean 'utils.js'? BREAKING CHANGE: The request './utils' failed
to resolve only because it was resolved as fully specified (probably
because the origin is strict EcmaScript Module, e. g. a module with
javascript mimetype, a '.mjs' file, or a '.js' file where the
package.json contains '"type": "module"'). The extension in the
request is mandatory for it to be fully specified. Add the extension
to the request.
package.json
{
"name": "myreactapp",
"version": "1.0.0",
"private": true,
"dependencies": {
"#date-io/date-fns": "^2.16.0",
"#mui/icons-material": "^5.10.9",
"#mui/material": "^5.10.9",
"#mui/x-date-pickers": "^5.0.4",
"#testing-library/jest-dom": "^5.16.5",
"#testing-library/react": "^13.4.0",
"#testing-library/user-event": "^13.5.0",
"#types/jest": "^27.5.2",
"#types/node": "^16.11.65",
"#types/react": "^18.0.21",
"#types/react-dom": "^18.0.6",
"#typescript-eslint/eslint-plugin": "^5.40.0",
"#typescript-eslint/parser": "^5.40.0",
"#mylib/shared": "^1.0.128-preview", // <-- my shared lib
"aws-amplify": "^4.3.37",
"clsx": "^1.2.1",
"date-fns": "^2.29.3",
"eslint": "^8.25.0",
"jest": "^27.5.1",
"react": "^18.2.0",
"react-app-rewired": "^2.2.1",
"react-dom": "^18.2.0",
"react-error-boundary": "^3.1.4",
"react-i18next": "^11.18.6",
"react-router-dom": "^6.4.2",
"react-scripts": "^5.0.1",
"tailwindcss": "^3.1.8",
"typescript": "^4.8.4",
"web-vitals": "^2.1.4"
},
"scripts": {
"start": "react-app-rewired start",
"build": "react-app-rewired build",
"test": "react-app-rewired test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
config-overrides.js
module.exports = {
// The Webpack config to use when compiling your react app for development or production.
webpack: function (config, env) {
const webpack = config.module.rules[1].oneOf;
webpack.splice(webpack.length - 1, 0, {
test: /\.m?js/,
resolve: {
fullySpecified: false
}
});
return config;
},
};
#mylib - package.json
{
"name": "#mylib/shared",
"version": "1.0.0-local",
"description": "Shared library",
"author": "na",
"license": "MIT",
"repository": "na",
"type": "module",
"main": "dist/index",
"module": "dist/index.modern.js",
"types": "dist/index",
"source": "src/index.js",
"engines": {
"node": ">=10"
},
"scripts": {
"build": "microbundle-crl --no-compress --format modern,cjs",
"start": "microbundle-crl watch --no-compress --format modern,cjs",
"prepare": "run-s build",
"test:all": "run-s test:unit test:lint test:build",
"test:build": "run-s build",
"test:lint": "eslint .",
"test:unit": "cross-env CI=1 react-scripts test --env=jsdom",
"test:watch": "react-scripts test --env=jsdom",
"predeploy": "cd example && npm install && npm run build",
"deploy": "gh-pages -d example/build",
"test": "jest",
"test:ci": "npm run test -- --watchAll=false --passWithNoTests --reporters=default --reporters=jest-junit --coverage --coverageReporters=cobertura"
},
"peerDependencies": {
"react": "^18.2.0"
},
"devDependencies": {
"babel-eslint": "^10.0.3",
"cross-env": "^7.0.2",
"eslint": "^7.1.0",
"eslint-config-prettier": "^6.7.0",
"eslint-config-standard": "^14.1.0",
"eslint-config-standard-react": "^9.2.0",
"eslint-plugin-import": "^2.18.2",
"eslint-plugin-node": "^11.0.0",
"eslint-plugin-prettier": "^3.1.1",
"eslint-plugin-promise": "^4.2.1",
"eslint-plugin-react": "^7.17.0",
"eslint-plugin-standard": "^4.0.1",
"gh-pages": "^2.2.0",
"jest": "^27.5.1",
"jest-junit": "^13.1.0",
"microbundle-crl": "^0.13.10",
"npm-run-all": "^4.1.5",
"prettier": "^2.7.1",
"react": "18.2.0",
"react-dom": "18.2.0",
"react-scripts": "^5.0.1",
"ts-jest": "^27.1.3",
"typescript": "4.8.4"
},
"files": [
"dist"
],
"dependencies": {
"#types/jest": "^27.4.1",
"#types/node": "^17.0.21",
"#types/react": "^17.0.39",
"#types/react-dom": "^17.0.11",
"aws-amplify": "^4.3.12",
"dotenv": "^16.0.0",
"fetch-intercept": "^2.4.0",
"object-mapper": "^6.2.0",
"react-i18next": "^11.15.6",
"typescript": "4.8.3",
"zen-observable-ts": "^1.1.0"
},
"jest-junit": {
"suiteNameTemplate": "{filepath}",
"outputDirectory": ".",
"outputName": "junit.xml"
}
}
#mylib - index.ts
import sharedUtils from './services/utils';
export {
sharedUtils,
};

React build is very different from development

Thanks you want to try to help me!
When I build my React web app it looks very different from the development mode. I use serve -s build to watch when the app is build. But also on my online Digitalocean server, it won't look the same as in development. So it probably has something to do with React or how it was build.
This is in development mode:
This is when it is build:
So it looks CSS or Javacript did not compile correctly.
This is my package.json
{
"name": "websitedominique",
"version": "0.1.0",
"private": true,
"dependencies": {
"#emotion/react": "^11.7.1",
"#emotion/styled": "^11.6.0",
"#material-ui/core": "^4.12.3",
"#material-ui/icons": "^4.11.2",
"#mui/icons-material": "^5.2.1",
"#mui/material": "^5.4.2",
"#mui/styled-engine-sc": "^5.4.2",
"#react-hook/mouse-position": "^4.1.3",
"#rehooks/window-size": "^1.0.2",
"#testing-library/jest-dom": "^5.11.4",
"#testing-library/react": "^11.1.0",
"#testing-library/user-event": "^12.1.10",
"concurrently": "^7.0.0",
"cors": "^2.8.5",
"express": "^4.17.3",
"framer-motion": "^4.1.17",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-router": "^6.0.2",
"react-router-dom": "^6.0.2",
"react-scripts": "4.0.3",
"styled-components": "^5.3.3",
"swiper": "^6.8.4",
"use-react-dimensions": "^2.0.1",
"web-vitals": "^1.0.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"nodemon": "^2.0.15"
}
}
I Hope someone can help me with this. Thanks for all help!

you should add a .env file in your root and add:
REACT_APP_SC_DISABLE_SPEEDY=true
The Styled Components library uses something called the "Speedy mode" to inject styles on production. you can Google it for more info

SyntaxError: Support for the experimental syntax 'decorators-legacy' isn't currently enabled

I'm working on an electron app, using React on the front end and I'm attempting to use Jest for testing. However, when I try to run tests I get the following error:
SyntaxError: C:\Users\JimArmbruster\source\repos\cyborg_cloud_explorer\cyborg_cloud_explorer_gui\src\assets\custom_components\stylesheets\buttons.css: Support for the experimental syntax 'decorators-legacy' isn't currently enabled (1:1):
> 1 | #import "../../fonts/fonts.css";
| ^
2 |
3 | :root {
4 | --cyborgBlue: #65c8cc;
at Parser._raise (node_modules/#babel/parser/src/parser/error.js:147:45)
at Parser.raiseWithData (node_modules/#babel/parser/src/parser/error.js:142:17)
at Parser.expectOnePlugin (node_modules/#babel/parser/src/parser/util.js:198:18)
at Parser.parseDecorator (node_modules/#babel/parser/src/parser/statement.js:424:10)
at Parser.parseDecorators (node_modules/#babel/parser/src/parser/statement.js:403:30)
at Parser.parseStatement (node_modules/#babel/parser/src/parser/statement.js:228:12)
at Parser.parseBlockOrModuleBlockBody (node_modules/#babel/parser/src/parser/statement.js:966:25)
at Parser.parseBlockBody (node_modules/#babel/parser/src/parser/statement.js:942:10)
at Parser.parseProgram (node_modules/#babel/parser/src/parser/statement.js:117:10)
at Parser.parseTopLevel (node_modules/#babel/parser/src/parser/statement.js:102:25)
I realize this question has been asked many times before but the most common solution is to add "["#babel/plugin-proposal-decorators", { "legacy": true }]" to the plugins section of my .babelrc file. Unfortunately that hasn't resolved the issue.
Here's my package.json file:
"name": "cyborg_cloud_explorer",
"version": "0.2.7",
"homepage": "./",
"author": "Cyborg Inc.",
"description": "Searchable, end-to-end encrypted cloud storage manager powered by Cyborg Stealth.",
"main": "public/electron.js",
"scripts": {
"start": "electron .",
"prestart": "npm run build",
"pack": "electron-builder --dir",
"dev": "concurrently \"npm run start-browser\" \"wait-on http://localhost:3000 && electron .\"",
"start-browser": "react-scripts start",
"eject": "react-scripts eject",
"ebuild": "npm run build && /node_modules/.bin/build",
"build": "react-scripts build",
"dist": "electron-builder",
"test": "jest __tests__/ --coverage",
"marge": "marge report.json",
"electron-dev": "concurrently \"BROWSER=none npm start\" \"wait-on http://localhost:3000 && electron .\"",
"electron-pack": "build --em.main=build/electron.js",
"preelectron-pack": "npm run build"
},
"dependencies": {
"#material-ui/core": "^4.12.3",
"aws4": "^1.11.0",
"axios": "^0.21.1",
"babel-plugin-syntax-dynamic-import": "^6.18.0",
"babel-preset-env": "^1.7.0",
"base32": "0.0.6",
"convert-csv-to-json": "^1.3.1",
"convert-excel-to-json": "^1.7.0",
"dotenv": "^10.0.0",
"ffi-napi": "^3.0.1",
"franc-min": "^5.0.0",
"hyperquest": "^2.1.3",
"jssha": "^3.2.0",
"keytar": "^6.0.1",
"mammoth": "^1.4.17",
"mochawesome-report-generator": "^5.1.0",
"ndjson": "^2.0.0",
"nibbler": "^0.2.0",
"node-addon-api": "^3.1.0",
"node-html-parser": "^3.3.6",
"node-machine-id": "^1.1.12",
"node-tika": "0.0.1",
"react-beautiful-dnd": "^13.1.0",
"react-file-icon": "^1.0.0",
"react-hotkeys-hook": "^3.4.0",
"react-scripts": "^4.0.3",
"ref-napi": "^2.1.2",
"ref-struct-napi": "^1.1.1",
"version": "^0.1.2",
"xml2js": "^0.4.23"
},
"devDependencies": {
"#babel/core": "^7.1.0",
"#babel/plugin-proposal-class-properties": "^7.1.0",
"#babel/plugin-proposal-decorators": "^7.1.0",
"#babel/plugin-transform-object-assign": "^7.1.0",
"#babel/plugin-transform-runtime": "^7.1.0",
"#babel/preset-env": "^7.1.0",
"#babel/preset-react": "^7.1.0",
"babel-loader": "^8.1.0",
"babel-plugin-transform-decorators-legacy": "^1.3.5",
"chai": "^4.2.0",
"chai-as-promised": "^7.1.1",
"concurrently": "^6.0.2",
"dotenv": "^10.0.0",
"electron": "^9.4.3",
"electron-builder": "^22.9.1",
"electron-builder-squirrel-windows": "^22.10.4",
"electron-chromedriver": "^11.0.0",
"eslint": "^7.17.0",
"jest": "^26.6.0",
"mocha": "^8.2.1",
"mochawesome": "^6.2.1",
"node-key-sender": "^1.0.11",
"react": "^16.2.0",
"react-dom": "^16.2.0",
"react-redux": "^7.2.4",
"react-router-dom": "^5.2.0",
"selenium-webdriver": "^4.0.0-beta.1",
"spectron": "^11.1.0",
"spectron-keys": "0.0.1",
"wait-on": "^5.3.0"
},
"build": {
"productName": "Cyborg Cloud Explorer",
"artifactName": "CloudExplorer",
"compression": "normal",
"forceCodeSigning": false,
"copyright": "Copyright 2020 Cyborg Inc., all rights reserved.",
"asarUnpack": [
"assets/cyborg_cloud_engine/linux/x64/cyborg_cloud_engine.so"
],
"extraResources": [
"assets/vs_redist/*"
],
"files": [
"src/assets/fonts/**/*",
"src/assets/media",
"src/assets/dictionaries",
"src/assets/cyborg_cloud_engine",
"src/pages/**/*",
"src/*",
"build/**/*"
],
"directories": {
"buildResources": "assets"
},
"win": {
"target": "squirrel",
"icon": "src/assets/media/cyborg.ico"
},
"linux": {
"target": "AppImage",
"icon": "./assets/media/256x256.png",
"executableName": "CloudExplorer",
"category": "Network",
"appId": "Cyborg.Cloud.Explorer"
},
"mac": {
"target": "dmg",
"icon": "./assets/media/cyborg.icns",
"appId": "com.cloud.explorer",
"category": "public.app-category.business"
},
"squirrelWindows": {
"iconUrl": "https://cyborg-cloud-explorer-assets.s3.amazonaws.com/cyborg.ico",
"loadingGif": "src/assets/media/installing_cyborg_cloud.gif"
}
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
And my .babelrc file:
"presets": ["#babel/preset-env", "#babel/preset-react"],
"plugins": [
["#babel/plugin-proposal-decorators", { "legacy": true }],
["#babel/plugin-proposal-class-properties", { "loose": true }]
]
}```

Jest won't use the babel plugins out of the box, you need to install some additional packages.
With yarn:
yarn add --dev babel-jest babel-core regenerator-runtime
With npm:
npm install babel-jest babel-core regenerator-runtime --save-dev
Jest should then pick up the configuration from your .babelrc or babel.config.js.
Source: https://archive.jestjs.io/docs/en/23.x/getting-started.html#using-babel

I think I've found the issue. When I changed the name of my .babelrc file to babel.config.json. I didn't get that error anymore.
According to Babel's docs, .babelrc files are file-relative whereas babel.config.json files are project wide.
Here's where you can read more about it: https://babeljs.io/docs/en/config-files

await function failing, is a babel compile thing missing?

I've just taken over a project from a disgruntled developer who thinks he's the best thing since sliced bread.
The error
He swears his code was running on the last commit... although, I get problems in an async/await. I vaguely remember having similar problems when not supporting the right version of babel, but that was years back. The project is created with create-react-app.
Here's the package.json file:
{
"name": "frontend",
"version": "0.1.0",
"private": true,
"jest": {
"transform": {}
},
"dependencies": {
"#makerdao/multicall": "^0.11.0",
"#material-ui/core": "^4.11.0",
"#material-ui/data-grid": "^4.0.0-alpha.8",
"#material-ui/icons": "^4.9.1",
"#testing-library/jest-dom": "^4.2.4",
"#testing-library/react": "^9.5.0",
"#testing-library/user-event": "^7.2.1",
"bignumber.js": "^9.0.1",
"bip32": "^2.0.6",
"bip38": "^3.1.1",
"bip39": "^3.0.2",
"bitcoinjs-lib": "^5.2.0",
"bs58check": "^2.1.2",
"ci": "^1.0.0",
"fake-indexeddb": "^3.1.2",
"highcharts": "^8.2.2",
"highcharts-react-official": "^3.0.0",
"jest-fetch-mock": "^3.0.3",
"json-bigint": "^1.0.0",
"json-bignumber": "^1.0.2",
"keccak256": "^1.0.2",
"node-fetch": "^2.6.1",
"puppeteer": "^5.5.0",
"qrcode-svg": "^1.1.0",
"react": "^16.14.0",
"react-dom": "^16.14.0",
"rimraf": "^2.6.3",
"secp256k1": "^4.0.2",
"typescript": "^4.0.5",
"web3": "^1.3.0",
"xmlhttprequest": "^1.8.0"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --verbose",
"eject": "react-scripts eject",
"predeploy": "npm run build",
"deploy": "gh-pages -d build"
},
"eslintConfig": {
"extends": [
"react-app",
"plugin:react/recommended"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"ansi-regex": "^4.1.0",
"eslint-plugin-react": "^7.21.5",
"gh-pages": "^3.1.0",
"react-scripts": "^3.4.4"
}
}

You are passing a promise to the function, and promise is not a function. You should do instead: await f and not execute it by await f() since the promise just needs to be called and not to be executed.

Unexpected token "{" when running mocha tests

I've created a react app that I want to test using the mocha/chai/enzyme combination, but I'm having trouble setting up the testing files.
I decided to follow a tutorial for creating the mocha tests, which can be found here: https://www.robinwieruch.de/react-testing-mocha-chai-enzyme-sinon. I have gotten to the point where I have created my script that uses the mocha command. The following
This is my package.json:
{
"name": "congressforme-app",
"version": "0.1.0",
"private": true,
"dependencies": {
"#babel/core": "^7.6.4",
"#babel/register": "^7.6.2",
"#types/react": "^16.9.4",
"#types/react-bootstrap": "^0.32.20",
"#types/react-dom": "^16.9.1",
"#types/react-router-bootstrap": "^0.24.5",
"#types/react-router-dom": "^5.1.0",
"axios": "^0.19.0",
"bootstrap": "^4.3.1",
"bootstrap-3-card": "^0.2.0",
"chai": "^4.2.0",
"enzyme": "^3.10.0",
"enzyme-adapter-react-16": "^1.15.1",
"ignore-styles": "^5.0.1",
"jquery": "^3.4.1",
"jsdom": "^15.2.0",
"mdbreact": "^4.21.0",
"mocha": "^6.2.2",
"newman": "^4.5.5",
"popper.js": "^1.15.0",
"react": "^16.10.1",
"react-bootstrap": "^1.0.0-beta.12",
"react-bootstrap-card": "^0.2.1",
"react-dom": "^16.9.0",
"react-paginate": "^6.3.0",
"react-router-bootstrap": "^0.25.0",
"react-router-dom": "^4.3.1",
"react-scripts": "3.1.2",
"react-twitter-embed": "^2.0.8",
"typescript": "^3.6.3"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"deploy": "aws s3 sync build/ s3://congressforme",
"test": "react-scripts test",
"eject": "react-scripts eject",
"my-tests": "mocha --require #babel/register --require ./test/helpers.js --require ./test/dom.js --require ignore-styles ./src/**/*.spec.js"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
And this is the error message I am receiving:
ERROR: Unexpected token {
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! congressforme-app#0.1.0 my-tests: `mocha --require `#babel/register --require ./test/helpers.js --require ./test/dom.js --require ignore-styles ./src/**/*.spec.js
I only have 1 test file in the my src folder. It is named App.spec.js
This is what it looks like:
import React from 'react';
import App from './App';
import Navbar from "react-bootstrap";
// this is a testing suite app component
describe('App Component', () => {
// this is a single test in the testing suite
it('renders the Counter wrapper', () => {
const wrapper = shallow(<App />);
expect(wrapper.find(Navbar)).to.have.length(1);
});
});
However, even if I delete the contents of App.spec.js entirely, the same error still occurs.