I have a carousel file in which I want to get index.js
and build block.build.js
, so my webpack.config.js
is:
var config = {
entry: './index.js',
output: {
path: __dirname,
filename: 'block.build.js',
},
devServer: {
contentBase: './Carousel'
},
module : {
rules : [
{
test: /.js$/,
loader: 'babel-loader',
exclude: /node_modules/,
query: {
presets: ['react', 'es2015'],
plugins: ['transform-class-properties']
}
}
]
}
};
module.exports = config;
The package.json
which I use is below:
{
"name": "carousel",
"version": "1.0.0",
"description": "",
"main": "webpack.config.js",
"dependencies": {
"@babel/core": "^7.0.0-beta.40",
"babel-cli": "^6.26.0",
"babel-loader": "^8.0.0-beta.0",
"babel-plugin-lodash": "^3.3.2",
"babel-plugin-react-transform": "^3.0.0",
"babel-preset-react": "^6.24.1",
"cross-env": "^5.1.3",
"lodash": "^4.17.5",
"react": "^16.2.0",
"react-dom": "^16.2.0",
"react-swipeable": "^4.2.0",
"styled-components": "^3.2.1"
},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"watch": "webpack --watch",
"start": "webpack-dev-server --open",
"build": "webpack"
},
"devDependencies": {
"webpack": "^4.1.1",
"webpack-cli": "^2.0.10",
"webpack-dev-server": "^3.1.0"
},
"author": "brad traversy",
"license": "ISC"
}
… but I get this error message:
ERROR in ./index.js
Module build failed: Error: Plugin/Preset files are not allowed to export objects, only functions.
Does anyone know how to solve this?
You're using a combination of Babel 6 and Babel 7. There is no guarantee of compatibility across versions:
"@babel/core": "^7.0.0-beta.40",
"babel-cli": "^6.26.0",
"babel-loader": "^8.0.0-beta.0",
"babel-plugin-lodash": "^3.3.2",
"babel-plugin-react-transform": "^3.0.0",
"babel-preset-react": "^6.24.1",
should be
"@babel/core": "^7.0.0-beta.40",
"@babel/cli": "^7.0.0-beta.40",
"babel-loader": "^8.0.0-beta.0",
"babel-plugin-lodash": "^3.3.2",
"babel-plugin-react-transform": "^3.0.0",
"@babel/preset-react": "^7.0.0-beta.40",
and
query: {
presets: ['react', 'es2015'],
plugins: ['transform-class-properties']
}
would be
query: {
presets: ['@babel/react', '@babel/es2015'],
plugins: ['@babel/proposal-class-properties']
}
I'm also confused because you didn't mention @babel/proposal-class-properties
in your package.json
, but assuming it is in there it should also be updated.