The ts-loader, antd, and typescript trio hits a stumbling block with the module index.less nowhere to

I am incorporating the antd React component library in my project and I'm using ts-loader to efficiently load the components. Currently, I am facing an issue while trying to configure webpack to transpile less files. The error I am encountering is as follows:

ERROR in ./node_modules/antd/lib/button/style/index.less
Module build failed: Error: Cannot find module 'less'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:594:15)
    at Function.Module._load (internal/modules/cjs/loader.js:520:25)
...

It seems like there might be an issue with the less-loader's installation or configuration, even though it is installed and should be configured correctly. Below is a snippet of my webpack configuration:

webpack.dev.js

module: {
    rules: [
      {
        test: /\.scss$/,
        loaders: ['style-loader', 'css-loader', 'postcss-loader', 'sass-loader']
      },
      {
        test: /\.css$/,
        loaders: ['style-loader', 'css-loader']
      },
      {
        test: /\.less$/,
        loader: 'less-loader' // compiles Less to CSS
      },
    ]
  },

common.webpack.js

const getTsLoaderRule = env => {
  const rules = [
    { loader: 'cache-loader' },
    {
      loader: 'ts-loader',
      options: {
            transpileOnly: true,
            getCustomTransformers: () => ({
            before: [ tsImportPluginFactory({
              libraryDirectory: 'es',
              libraryName: 'antd',
              style: 'css',
            })]
          }),
          compilerOptions: {
            module: 'es2015'
          }
        },
    }
  ];
  if (env === 'development') {
    rules.unshift({
      loader: 'react-hot-loader/webpack'
    });
  }
  return rules;
};
...
module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: getTsLoaderRule(options.env),
        include: [utils.root('./src/main/webapp/app')],
        exclude: ['node_modules']
      },
      {
        test: /\.(jpe?g|png|gif|svg|woff2?|ttf|eot)$/i,
        loaders: ['file-loader?hash=sha512&digest=hex&name=content/[hash].[ext]']
      },
      {
        enforce: 'pre',
        test: /\.jsx?$/,
        loader: 'source-map-loader'
      },
      {
        test: /\.tsx?$/,
        enforce: 'pre',
        loaders: 'tslint-loader',
        exclude: ['node_modules']
      }
    ]
  },

Any suggestions on how to resolve this issue?

Answer №1

The issue at hand is not related to a misconfigured less-loader. Instead, it stems from the absence of less, which is a peer dependency of this package. To resolve this, execute npm i -S less for installation.

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