Hello I tried to search in other questions but none of mentioned solutions I tried did not work for me.
When using command:
npm start
I have an error:
ERROR in ./src/index.js Module build failed (from ./node_modules/babel-loader/lib/index.js): SyntaxError: D:/Kodilla/Projekty/webpack-to-do-app/src/index.js: Unexpected > token (6:4)
5 | ReactDOM.render( 6 | <App />, | ^ 7 | document.getElementById('app') 8 | );
Defined command in package.json:
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "webpack"
},
index.js file:
import React from 'react';
import ReactDOM from 'react-dom';
import App from './containers/App';
ReactDOM.render(
<App />,
document.getElementById('app')
);
App.js file:
import React from 'react';
import uuid from 'uuid';
import style from './App.css';
class App extends React.Component {
constructor(props){
super(props);
this.state = {
data: []
};
}
addTodo(val){
const todo = {
text: val,
id: uuid.v4(),
};
const data = [...this.state.data, todo];
this.setState({data});
}
removeTodo(id) {
const remainder = this.state.data.filter(todo => todo.id !== id);
this.setState({data: remainder});
}
render() {
return (
<div className={style.TodoApp}>
Tutaj pojawią się komponenty naszej aplikacji.
</div>
);
}
}
export default App;
webpack.config.js file:
const path = require('path');
module.exports = {
entry: './src/index.js',
output: {
path: path.resolve(__dirname, 'build'),
filename: 'app.bundle.js'
},
module: {
rules: [
{
test: /\.js$/,
loader: "babel-loader"
},
{
test: /\.css$/,
use: [
{ loader: 'style-loader'},
{
loader: 'css-loader',
options: {
modules: true
}
}
]
}
]
}
};
.babelrc file:
{
"presets": [
["env", "react"]
]
}
Edit: I tried the solution from post you suggest I duplicate but copied 1:1 did not work for me. I changed my webpack config to:
module: {
loaders: [...
{
test: /\.(js|jsx)?$/,
loader: 'babel-loader',
query: {
presets: ['es2015', 'react']
}
}]
},
and problem still occurrs. I think I may be doing something wrong in other place than in mentioned example.
Edit 2:
- I use [email protected] and [email protected] because these are requirement of the project.
- React and react-dom dependencies installed.
- Presets: react. env, es2015, stage-0 installed by
npm install babel-preset-... --save-dev.
- First suggested .babelrc config done:
"presets": ["react", "es2015", "stage-0"]
- Error occurrs:
Couldn't find preset "@babel/preset-env" relative to directory "...webpack-to-do-app\node_modules\css-loader"
What am I still doing wrong?
Problem was solved.
Things that helped: 1. Update presets from babel-env, babel-react to @babel/preset-env and @babel/preset-react. @babel-core was installed but babel-core stayed on place. Final set:
"devDependencies": {
"@babel/core": "^7.2.2",
"@babel/preset-env": "^7.2.3",
"@babel/preset-react": "^7.0.0",
"babel": "^6.23.0",
"babel-core": "^6.26.3",
"babel-loader": "^8.0.4",
"css-loader": "^2.1.0",
"react": "^16.7.0",
"react-dom": "^16.7.0",
"style-loader": "^0.23.1",
"webpack": "^4.28.2",
"webpack-cli": "^3.1.2"
},
2. Uninstall and install babel-loader which caused problem with requiring wrong version of babel itself. @Alireza your suggestion was partially right. Thanks for helping.