javascript - Webpack production JS file exceeds the recommended size limit

Question

I am getting the following warnings when I run my build-prod. I am not sure how to check what is eating so many resources or how to manage this:

WARNING in asset size limit: The following asset(s) exceed the recommended size limit (244 KiB). This can impact web performance. Assets: app.js (500 KiB)

WARNING in entrypoint size limit: The following entrypoint(s) combined asset size exceeds the recommended limit (244 KiB). This can impact web performance. Entrypoints: app (503 KiB) app.css app.js

In my package.json:

"dependencies": {
        "babel-polyfill": "^6.26.0",
        "body-parser": "^1.19.0",
        "express": "^4.17.1",
        "firebase": "^7.15.5",
        "normalize.css": "^8.0.1",
        "nunjucks": "^3.2.1",
        "puppeteer": "^5.5.0",
        "webpack": "^4.43.0",
        "webpack-cli": "^3.3.12",
        "webpack-dev-server": "^3.11.0"
    },
    "devDependencies": {
        "@babel/core": "^7.10.4",
        "@babel/preset-env": "^7.10.4",
        "babel-loader": "^8.1.0",
        "clean-webpack-plugin": "^3.0.0",
        "css-loader": "^3.6.0",
        "html-webpack-plugin": "^4.3.0",
        "mini-css-extract-plugin": "^0.9.0",
        "node-sass": "^4.14.1",
        "nunjucks-webpack-plugin": "^5.0.0",
        "optimize-css-assets-webpack-plugin": "^5.0.3",
        "sass": "^1.26.9",
        "sass-loader": "^9.0.1",
        "source-map-loader": "^1.1.3",
        "style-loader": "^1.2.1",
        "terser-webpack-plugin": "^3.0.6"
    }

In webpack.prod:

const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
    mode: 'production',
    entry: {
        polyfill: 'babel-polyfill',
        app: './src/client/index.js'
    },
    output: {
        libraryTarget: 'var',
        library: 'Client' // All js is accessible through client library - can be any name.
    },
    optimization: {
        minimizer: [new TerserPlugin({}), new OptimizeCssAssetsPlugin({})]
    },
    module: {
        rules: [
            {
                test: /.js$/,
                enforce: 'pre',
                use: [
                    { 
                        loader: 'source-map-loader',
                        options: {
                            filterSourceMappingUrl: (url, resourcePath) => {
                                if (/.*/node_modules/.*/.test(resourcePath)) {
                                    return false
                                }
                                return true
                            }
                        }
                    }],
            },
            {
                test: /.js$/,
                exclude: /node_modules/,
                loader: "babel-loader"
            },
            {
                test: /.(css|sass|scss)$/,
                use: [ 
                    MiniCssExtractPlugin.loader, 
                    'css-loader', 
                    {
                        loader: 'sass-loader',
                        options: {
                          implementation: require('sass')
                        }
                    }
                ]
            },
            {
                test: /.js$/,
                enforce: 'pre',
                use: ['source-map-loader'],
            }
        ]
    },
    plugins: [
        new HtmlWebpackPlugin({
            template: "./src/client/views/index.html",
            filename: "./index.html"
        }),
        new CleanWebpackPlugin({
            // Simulate the removal of files
            dry: true,
            // Write Logs to Console
            verbose: true,
            // Automatically remove all unused webpack assets on rebuild
            cleanStaleWebpackAssets: true,
            protectWebpackAssets: false
        }),
        new MiniCssExtractPlugin({filename: '[name].css'}),
    ]
}

In webpack.dev:

const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const { CleanWebpackPlugin } = require('clean-webpack-plugin');

module.exports = {
    mode: 'development',
    entry: {
        polyfill: 'babel-polyfill',
        app: './src/client/index.js'
    },
    output: {
        libraryTarget: 'var',
        library: 'Client' // All js is accessible through client library - can be any name.
    },
    module: {
        rules: [
            {
                test: /.js$/,
                exclude: /node_modules/,
                loader: "babel-loader"
            },
            {
                test: /.(css|sass|scss)$/,
                use: [
                    'style-loader',
                    'css-loader', 
                    {
                        loader: 'sass-loader',
                        options: {
                          implementation: require('sass')
                        }
                    }
                ]            
            },
            {
                test: /.js$/,
                enforce: 'pre',
                use: ['source-map-loader'],
            }
        ]
    },
    stats: {
        warningsFilter: [/Failed to parse source map/],
    },
    plugins: [
        new HtmlWebpackPlugin({
            template: "./src/client/views/index.html",
            filename: "./index.html"
        }),
        new CleanWebpackPlugin({
            // Simulate the removal of files
            dry: true,
            // Write Logs to Console
            verbose: true,
            // Automatically remove all unused webpack assets on rebuild
            cleanStaleWebpackAssets: true,
            protectWebpackAssets: false
        }),
    ],
}

Not sure what is going on, is there any command I can use to check how much size each is using?

Answer 1

等待大神答复