CODEWITHSUNDEEP
reactjswebpack
S.M_Emamian
S.M_Emamian

Reputation: 17383

configuration.module has an unknown property 'loaders'

my output of error:

Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema. - configuration.module has an unknown property 'loaders'. These properties are valid: object { exprContextCritical?, exprContextRecursive?, exprContextRegExp?, exprContextRequest?, noParse?, rules?, defaultRules?, unknownContextCritical?, unknownContextRecursive?, unknownContextRegExp?, unknownContextRequest?, unsafeCache?, wrappedContextCritical?, wrappedContextRecursive?, wrappedContextRegExp?, strictExportPresence?, strictThisContextOnImports? } -> Options affecting the normal modules (NormalModuleFactory).

my webpack.config.js:

var webpack = require('webpack');
var path = require('path');

var BUILD_DIR = path.resolve(__dirname, 'src/client/public');
var APP_DIR = path.resolve(__dirname, 'src/client/app');

var config = {
  entry: APP_DIR + '/index.jsx',
  module : {
    loaders : [
      {
        test : /\.jsx?/,
        include : APP_DIR,
        loader : 'babel-loader'
      }
    ]
  },
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  }

};


module.exports = config;

my webpack version:

[email protected]

Upvotes: 180

Views: 107288

Answers (6)

Ambuj Khanna
Ambuj Khanna

Reputation: 1219

I am using Webpack 5 and I removed below config from my webpack.config. It worked for me after removing. It may help some other people who still facing error

        {
            test: /\.css$/,
            use: ['style-loader', 'css-loader']
        },

Upvotes: 0

Pankaj Upadhyay
Pankaj Upadhyay

Reputation: 2138

Working for me below webpack.config.js

module.exports = {
    entry: [
        '.src/index.js'
    ],
    output:{
        path: __dirname,
        filename: 'app/js/main.js'
    },
    module:{
        rules: [
          { test: /\.css$/, use: 'css-loader' },
          { test: /\.ts$/, use: 'ts-loader' }
        ]
    }
}

Upvotes: 2

S.M_Emamian
S.M_Emamian

Reputation: 17383

You should change loaders to rules in webpack 4:

change:

loaders

to:

rules

source: Loaders

Example:

module.exports = {
  module: {
    rules: [
      { test: /\.css$/, use: 'css-loader' },
      { test: /\.ts$/, use: 'ts-loader' }
    ]
  }
};

Upvotes: 404

MattG
MattG

Reputation: 6385

You should use the migration utility to migrate your webpack config files, it worked for me.

The migration documentation is also useful.

Upvotes: 4

Anshul
Anshul

Reputation: 549

Above given answers are working but we can resolve this issue by changing webpack and webpack-dev-server version to 

"webpack": "3.8.1",
"webpack-dev-server": "2.9.4"

It can also solve the issue. Hope it will help.

Upvotes: 3

Shawn Stephens
Shawn Stephens

Reputation: 161

Use rules in webpack 4 instead of loaders.

https://webpack.js.org/concepts/loaders/

Upvotes: 16

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