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creating bundle of vuejs app using rollup -- TypeError: Cannot read property 'reactivityTransform' of undefined

I am trying to bundle vue app using rollup. When calling the rollup command I get a pretty strange error:
[!] (plugin vue) TypeError: Cannot read property 'reactivityTransform' of undefined
src/scripts/modules/app.vue
TypeError: Cannot read property 'reactivityTransform' of undefined
at Object.compileScript (/home/kabira/SkunkWorks/rollup/atoz_again/node_modules/#vue/compiler-sfc/dist/compiler-sfc.cjs.js:3300:49)
at getScriptCode (/home/kabira/SkunkWorks/rollup/atoz_again/node_modules/rollup-plugin-vue/dist/index.js:326:48)
at transformVueSFC (/home/kabira/SkunkWorks/rollup/atoz_again/node_modules/rollup-plugin-vue/dist/index.js:285:26)
at Object.transform (/home/kabira/SkunkWorks/rollup/atoz_again/node_modules/rollup-plugin-vue/dist/index.js:212:32)
at /home/kabira/SkunkWorks/rollup/atoz_again/node_modules/rollup/dist/shared/rollup.js:22779:37
Not sure if I am missing crucial plugins or have installed wrong versions of the dependencies. Any help would be great.
Below is my package.json
{
"name": "atoz_again",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"rollup:help": "rollup --help",
"rollup": "rollup -c -w --environment BUILD:development"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"#rollup/plugin-commonjs": "^21.0.3",
"#rollup/plugin-inject": "^4.0.4",
"#rollup/plugin-json": "^4.1.0",
"#rollup/plugin-node-resolve": "^13.1.3",
"#rollup/plugin-replace": "^4.0.0",
"autoprefixer": "^10.4.4",
"postcss": "^8.4.12",
"rollup": "^2.70.1",
"rollup-plugin-cleaner": "^1.0.0",
"rollup-plugin-node-polyfills": "^0.2.1",
"rollup-plugin-postcss": "^4.0.2",
"rollup-plugin-purgecss": "^4.1.3",
"rollup-plugin-terser": "^7.0.2",
"rollup-plugin-vue-inline-svg": "^1.1.2",
"tailwindcss": "^3.0.23"
},
"dependencies": {
"rollup-plugin-vue": "^6.0.0-beta.10",
"vue": "^3.2.31"
}
}
and rollup.config.js
import postcss from 'rollup-plugin-postcss';
import { terser } from 'rollup-plugin-terser';
import json from '#rollup/plugin-json';
import resolve from '#rollup/plugin-node-resolve';
import commonjs from '#rollup/plugin-commonjs';
import replace from '#rollup/plugin-replace';
import autoprefixer from 'autoprefixer';
import tailwind from 'tailwindcss';
//import svg from 'rollup-plugin-vue-inline-svg';
import builtins from 'rollup-plugin-node-polyfills';
import purgecss from 'rollup-plugin-purgecss';
import vue from 'rollup-plugin-vue';
const production = !process.env.ROLLUP_WATCH;
const NODE_ENV = process.env.NODE_ENV || 'development';
module.exports = {
input: 'src/main.js',
output: {
file: 'build/dist.js',
name: 'app',
format: 'iife',
sourcemap: process.env.BUILD === 'development',
},
plugins: [
builtins(),
replace({
'process.env.NODE_ENV': JSON.stringify(NODE_ENV)
}),
postcss({
extract: true,
plugins: [
autoprefixer(),
tailwind(),
production && purgecss({
content: ['./static/index.html', './src/**/*.vue'],
defaultExtractor: content => content.match(/[\w-/:]+(?<!:)/g) || []
}),
]
}),
//svg(),
vue({
css: false
}),
json(),
resolve(),
commonjs(),
production && terser()
]
};

ERROR in ./src/index.js Module build failed (from ./node_modules/babel-loader/lib/index.js):

I'm trying to set up ReactJs from scratch but npm start, dev, build, and watch are throwing the error below:
ERROR in ./src/index.js
Module build failed (from ./node_modules/babel-loader/lib/index.js):
SyntaxError: C:\da4na4\web\stocker\src\index.js: Unexpected character '�' (1:0)
I have setup package.json, webpack.config.js, and .babelrc configurations. I have equally tried out previous answers on Stack Overflow, yet the issue persist. Below are the configurations of the respective files:
package.json
{
"name": "stocker",
"version": "1.0.0",
"description": "A product inventory web app to help you keep track of your stocks and meet demands",
"main": "webpack.config.js",
"scripts": {
"test": "jest ./src/tests",
"dev": "webpack --mode development",
"build": "webpack --mode production",
"watch": "webpack --watch",
"start": "webpack serve --mode development --open --hot"
},
"keywords": [
"products",
"Inventory"
],
"author": "Emmanuel Joshua",
"license": "MIT",
"devDependencies": {
"#babel/core": "^7.12.16",
"#babel/preset-env": "^7.12.16",
"#babel/preset-react": "^7.12.13",
"#webpack-cli/serve": "^1.3.0",
"babel-loader": "^8.2.2",
"css-loader": "^5.0.2",
"html-loader": "^1.3.2",
"html-webpack-plugin": "^5.0.0",
"jest": "^26.6.3",
"jsdom": "^16.4.0",
"sass-loader": "^11.0.1",
"style-loader": "^2.0.0",
"webpack": "^5.21.2",
"webpack-cli": "^4.5.0",
"webpack-dev-server": "^3.11.2"
},
"dependencies": {
"react": "^17.0.1",
"react-dom": "^17.0.1"
}
}
webpack.config.js
const path = require("path");
const HtmlWebpackPlugin = require('html-webpack-plugin');
const htmlPlugin = new HtmlWebpackPlugin({
template: "./src/index.html",
filename: "index.html"
});
module.exports = {
entry: "./src/index.js",
output: {
path: path.resolve(__dirname, "public"),
filename: "js/app.min.bundle.js",
},
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
use: {
loader: "babel-loader"
}
},
{
test: /\.(scss|css)$/, use: ["sass-loader", "css-loader", "style-loader"]
},
{
test: /\.(html)$/, use: ["html-loader"]
}
],
},
plugins: [htmlPlugin],
target:"node",
devServer:{
port: 3000,
contentBase: path.resolve(__dirname, "public")
},
resolve: {
extensions: ["*", ".js", ".jsx"],
},
};
.babelrc
{
"presets": [
"#babel/preset-env",
"#babel/preset-react"
]
}
These are the index.js and the App.js files
index.js
import React from 'react';
import ReactDOM from 'react-dom';
import App from './js/App';
ReactDOM.render(
<App firstname={"Joshua"} />,
document.getElementById("root")
)
js/App.js
import React, {Component} from 'react';
class App extends Component{
constructor(props){
super(props);
}
render(){
return(
<h1>Hello {this.props.firstname}, Welcome to our Website!</h1>
)
}
}
export default App;

This tripped me a while. I found out one of the reasons is because of the directory naming path.
I used # for a folder name and it gave me the same error you're reading into.
e.g. my path
C:/Users/johndoes/codes/# wip/project1/sub/
My suggestion is looking at the pathing and seeing if everything is on the right place and referred to correctly.

Webpack 4 basic React js hello world fails with "Module parse failed: Unexpected token"

Update:
Code pushed to https://github.com/gsouvik/react_spa_experiment
Initial Post:
I know there are hundreds of threads out there, some had typos in webpack config, some used the loaders in a wrong way, some got it solved, some still open. But after numerous tries I still cannot get this working, a simple "Hello World" using Webpack 4, React js.
What I did
I was following this video tutorial line by line:
React & Webpack 4 from scratch
My package.json
{
"name": "my_react_experiment_2",
"version": "1.0.0",
"description": "Basic react with webpack ",
"main": "index.js",
"scripts": {
"dev": "webpack-dev-server --mode development --hot",
"build": "webpack --mode production"
},
"author": "Souvik Ghosh",
"license": "ISC",
"dependencies": {
"react": "^16.4.2",
"react-dom": "^16.4.2"
},
"devDependencies": {
"babel-core": "^6.26.3",
"babel-loader": "^7.1.5",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1",
"html-webpack-plugin": "^3.2.0",
"webpack": "^4.17.1",
"webpack-cli": "^3.1.0",
"webpack-dev-server": "^3.1.5"
}
}
My webpack.config.js
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
module.export = {
entry: './src/index.js',
output: {
path: path.join(__dirname, '/build'),
filename: 'index_bundle.js'
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: "babel-loader"
}
}
]
},
plugins: [
new HtmlWebpackPlugin({
template: './src/templates/index.html'
})
]
};
My .babelrc
{
"presets": ["env", "react"]
}
My directory structure
Expected behaviour
I fire up the dev server npm run dev. Expected to see my shiny new React js page saying "My first React Webpack project" (from the component /components/App.js)
Actual Behavior
ERROR in ./src/index.js 5:16
Module parse failed: Unexpected token (5:16)
You may need an appropriate loader to handle this file type.
| import App from "./components/App";
|
ReactDOM.render(, document.getElementById('root'));
| //ReactDOM.render('Hello User ', document.getElementById('root'));
# multi (webpack)-dev-server/client?http://localhost:8080 (webpack)/hot/dev-server.js ./src main2
If required I can share the codebase via a git repo. Any help is greatly appreciated.

The issue is with typo in your webpack config file.
You have module.export which is not correct. It should be module.exports
Working example
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
entry: './src/index.js',
output: {
path: path.join(__dirname, '/build'),
filename: 'index_bundle.js'
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: "babel-loader"
}
}
]
},
plugins: [
new HtmlWebpackPlugin({
template: './src/templates/index.html'
})
]
};

Webpack Module build failed when importing React components

I'm working on a project to integrate React and ASP.Net together. I've made the initial Hello World and every works as expected (not hard :p). I'm using webpack with babel-loader to generate my `bundle.js.
import React from 'react'
import ReactDOM from 'react-dom'
ReactDOM.render(<h1>LPMU</h1>, document.getElementById('root'))
This is my webpack.config.js file:
module.exports = {
context: __dirname,
entry: "./App.js",
output: {
path: __dirname + "/dist",
filename: "bundle.js"
},
watch: true,
module: {
rules: [
{
test: /\.js$/,
exclude: /(node_modules|bower_components)/,
use: {
loader: 'babel-loader',
options: {
presets: ['babel-preset-env', 'babel-preset-react']
}
}
}
]
}
}
After this worked out, I tried to add my App.js component and all other components into my react folder, inside Scripts on my ASP.NET project. I'm not doing the export default App since I'm using the ReactDOM.render(). I import my components into my App.js as usual:
import React, { Component } from 'react';
import ReactDOM from 'react-dom'
import './App.css';
import Header from './Header';
import Footer from './Footer';
import Landing from './Landing';
import * as lpmuGlobal from './lpmu-global';
And then I just render the App component:
ReactDOM.render(<App />, document.getElementById('root'))
Now when I run npm run webpack again, I get 2 problems, which are the following:
size name module status
704 B 0 ./App.js built failed ✖
Δt 596ms (1 asset hidden)
./App.js
0:0 error Module build failed (from ./node_modules/babel-loader/lib/index.js):
configuration
0:0 warning The 'mode' option has not been set, webpack will fallback to
'production' for this value. Set 'mode' option to 'development' or
'production' to enable defaults for each environment.
✖ 2 problems (1 error, 1 warning)
I've been searching for a solution, but since I'm really new to webpack, I don't know what happens, if I need anything else on my webpack.config.js, if I have to import my components in any other way or whatever.
ALso this is my json.package:
{
"name": "lpmu-react-app",
"version": "1.0.0",
"description": "Integración de ReactJS con ASP.NET",
"main": "App.js",
"scripts": {
"start": "react-scripts start",
"webpack": "webpack",
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "DPS",
"license": "ISC",
"dependencies": {
"react": "^16.4.0",
"react-dom": "^16.4.0",
"webpack-command": "^0.2.1"
},
"devDependencies": {
"babel-core": "^6.26.3",
"babel-loader": "^7.1.4",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1",
"webpack": "^4.12.0",
"webpack-cli": "^3.0.4"
}
}
Thanks

The error is because you have not added a .babelrc file or babel options to your package.json file to provide babel options.
In order to enable the preset you have to define it in your .babelrc
file
Add babel option to your package.json as such :
package.json:
{
"name": "lpmu-react-app",
"version": "1.0.0",
"description": "Integración de ReactJS con ASP.NET",
"main": "App.js",
"scripts": {
"start": "react-scripts start",
"webpack": "webpack",
"test": "echo \"Error: no test specified\" && exit 1"
},
"babel":{
"presets": ["env","react"]
}
"author": "DPS",
"license": "ISC",
"dependencies": {
"react": "^16.4.0",
"react-dom": "^16.4.0",
"webpack-command": "^0.2.1"
},
"devDependencies": {
"babel-core": "^6.26.3",
"babel-loader": "^7.1.4",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1",
"webpack": "^4.12.0",
"webpack-cli": "^3.0.4"
}
}
Go through the below links for further clarification:
https://babeljs.io/docs/en/babelrc.html
https://babeljs.io/en/setup/#installation
About the warning :
Webpack 4 needs you to include the mode option to your configuration, as you would usually want to have development and production configurations separate.
Go through the link below which explains in detail how to set configurations.
https://www.valentinog.com/blog/webpack-4-tutorial/
module.exports = {
context: __dirname,
entry: "./App.js",
output: {
path: __dirname + "/dist",
filename: "bundle.js"
},
watch: true,
module: {
rules: [
{
test: /\.js$/,
exclude: /(node_modules|bower_components)/,
use: {
loader: 'babel-loader',
options: {
presets: ['babel-preset-env', 'babel-preset-react']
}
}
}
]
}
}
Hope that helps :)

babel-loader 6.0.0 doesn't work correct

I am using webpack this is my
webpack.config.js
const path = require('path');
module.exports = {
entry: './src/app',
output: {
path: path.join(__dirname, '/public'),
filename: 'bundle.js'
},
watch: true,
watchOptions: {
aggregateTimeout: 100
},
devtool: 'source-map',
module: {
loaders: [{
test: /\.js$/,
loader: "babel-loader"
}]
}
}
and this my file from entry point
app.js
import React from 'react'
without anything, just simple line of code.
When i am trying to run webpack from command line and i got the next error
app.js Line 1: Unexpected token You may need an appropriate loader to
handle this file type. | import React from 'react';
package.json
{
"name": "a-b-c",
"version": "1.0.0",
"main": "server.js",
"dependencies": {
"babel-loader": "^6.0.0",
"react": "^0.14.1",
"webpack": "^1.12.2"
},
"devDependencies": {
"babel-core": "^6.0.14"
},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC",
"description": ""
}
Also, when i changed ES6 syntax in my app.js file to ES5 then it works well.
Any suggestions?
Thanks in advance.

I've found out. The problem was with babel-loader and to fix this issue you need to install
npm install babel-loader babel-core babel-preset-es2015
and add to your webpack.config.js file next lines
loader: 'babel?presets[]=es2015'
Source of information
Thanks