rails/webpacker module build fail issue from ./node_modules/mini-css-extract-plugin/dist/loader.js

Question

I have upgraded @rails/webpacker from v4 to v5 (5.72.1, to be precise). While upgrading, I got following issue

ERROR in ./node_modules/croppie/croppie.css Module build failed (from ./node_modules/@rails/webpacker/node_modules/mini-css-extract-plugin/dist/loader.js): TypeError: Cannot read property 'tap' of undefined

This is how I have setup my webpack config

const { environment } = require('@rails/webpacker');
const vue = require('./loaders/vue');
const webpack = require('webpack');
const VueLoaderPlugin = require('vue-loader/lib/plugin');
const TerserPlugin = require('terser-webpack-plugin');
const path = require('path');

const customConfig = {
  resolve: {
    fallback: {
      dgram: false,
      fs: false,
      net: false,
      tls: false,
      child_process: false,
    },
  },
  entry: {
    vendor: ['babel-polyfill', 'vue', 'moment', 'axios'],
  },
};

environment.splitChunks((config) => {
  console.log('config', environment);
  return {
    ...config,
    ...{
      optimization: {
        splitChunks: { chunks: 'all', name: '~' },
        runtimeChunk: true,
      },
    },
  };
});


environment.config.delete('node.dgram');
environment.config.delete('node.fs');
environment.config.delete('node.net');
environment.config.delete('node.tls');
environment.config.delete('node.child_process');

environment.config.merge(customConfig);

environment.plugins.append('VueLoaderPlugin', new VueLoaderPlugin());
environment.loaders.append('vue', {
  test: /\.vue$/,
  loader: 'vue-loader',
});

// Comment this if you need case-sensitive-paths-plugin in local development.
if (process.env.RAILS_ENV === 'development') {
  environment.plugins.delete('CaseSensitivePaths');

  // Only add en.js locale for local development.
  environment.plugins.append('moment', new webpack.ContextReplacementPlugin(/moment[/\\]locale/, /(en).js/));
}

environment.plugins.prepend('Environment', new webpack.EnvironmentPlugin(JSON.parse(JSON.stringify(process.env))));
environment.plugins.prepend(
  'Provide',
  new webpack.ProvidePlugin({
    $: 'jquery',
    jQuery: 'jquery',
    jquery: 'jquery',
  })
);

const config = environment.toWebpackConfig();

config.resolve.alias = {
  jquery: 'jquery/src/jquery',
};

let sassLoader = environment.loaders.get('sass').use.find(item => item.loader === 'sass-loader')
sassLoader = {
  ...sassLoader,
  options: {
    ...sassLoader.options,
    sassOptions: {
      ...sassLoader.options.sassOptions,
      includePaths: ["./node_modules"],
    }
  }
}

let miniCssExtractPlugin = environment.plugins.get('MiniCssExtract')
console.log('miniCssExtractPlugin', miniCssExtractPlugin)

environment.loaders.append('vue', vue);

environment.config.merge({
  optimization: {
    minimize: false,
    minimizer: [
      new TerserPlugin({
        test: /\.js(\?.*)?$/i,
      }),
    ],
  },
  resolve: {
    alias: {
      app: path.resolve(__dirname, '../../app/'),
    },
  },
});

module.exports = environment

This is the logs

If I comment import 'croppie/croppie.css' in the js file where it is used, the error goes away where croppie is a third party library.

Not sure if this issue is only while importing third party css file.

Answer 1

You using custom Fn Lamda that can customize is correct, I also doing by

1. Using Lamda Callback the answer will see as in below you can trails for each layer when using name.

[<KerasTensor: shape=(None, 1, 32, 32, 3) dtype=float32 (created by layer 'input_1')>]

<keras.engine.functional.Functional object at 0x0000016DB5CC51C0>

2. Lamda Fn as you do the same way you have the same answer

 [<KerasTensor: shape=(None, 1, 32, 32, 3) dtype=float32 (created by layer 'input_1')>]
<keras.engine.functional.Functional object at 0x0000016DB5CC51C0>

3. You also can do by model properties when you using sequential

model = tf.keras.models.Sequential([                    
tf.keras.layers.InputLayer(input_shape=(1, 32, 32, 3)), ...         
])

And more you can do with array and sequence properties ...