Go Programming

Go Programming


Module Bundlers Explained... Webpack, Rollup, Parcel, and Snowpack

What is a Module Bundler? And why do I need one? Learn how tools like Webpack, Rollup, Parcel, and Snowpack can package your code as a production-ready web application.

Webpack https://webpack.js.org/
Snowpack https://www.snowpack.dev/

#webpack #parcel #programming #developer

What is GEEK

Buddha Community

Module Bundlers Explained... Webpack, Rollup, Parcel, and Snowpack
Go Programming

Go Programming


Module Bundlers Explained... Webpack, Rollup, Parcel, and Snowpack

What is a Module Bundler? And why do I need one? Learn how tools like Webpack, Rollup, Parcel, and Snowpack can package your code as a production-ready web application.

Webpack https://webpack.js.org/
Snowpack https://www.snowpack.dev/

#webpack #parcel #programming #developer

Carmen  Grimes

Carmen Grimes


An Introduction to the Rollup.js JavaScript Bundler

Snowpack, Webpack and Parcel bundle your JavaScript but are hard to custom configure. Rollup.js is faster and more configurable. Learn how to set it up!

Rollup.js is a next-generation JavaScript module bundler from Rich Harris, the author of Svelte. It compiles multiple source files into a single bundle.

The benefits include:

  • development is easier to manage when using smaller, self-contained source files
  • the source can be linted, prettified, and syntax-checked during bundling
  • tree-shaking removes unused functions
  • transpiling to ES5 for backward compatibility is possible
  • multiple output files can be generated — for example, your library could be provided in ES5, ES6 modules, and Node.js-compatible CommonJS
  • production bundles can be minified and have logging removed

Other bundler options, such as webpack, Snowpack, and Parcel, attempt to magically handle everything: HTML templating, image optimization, CSS processing, JavaScript bundling, and more. This works well when you’re happy with the default settings, but custom configurations can be difficult and processing is slower.

Rollup.js primarily concentrates on JavaScript (although there are plugins for HTML templates and CSS). It has a daunting number of options, but it’s easy to get started and bundling is fast. This tutorial explains how to use typical configurations within your own projects.

#javascript #rollup #snowpack #webpack #parcel

Meggie  Flatley

Meggie Flatley


Benchmarking Bundlers 2020: Rollup vs. Parcel vs. Webpack

Bundlers serve as a cornerstone technology for all modern web apps. We’ve benchmarked Rollup, Parcel.js, and webpack across multiple criteria.

Bundlers serve as a cornerstone technology for all modern web apps — or, more specifically, all JavaScript apps. As the frontend world progressed with more client-side-rendered apps, ideas began to emerge about how to efficiently bundle our tons of JS.

Cognitively, as the number of options increase, selection becomes difficult. Here, we will analyze the tech and non-tech competencies of the top bundlers available today to make your decision easy and well informed.

We’ll be covering:

For comparing technical competencies, we have picked up React Facebook Pixel as a library and a very basic React app as a sample to benchmark each of these bundlers.

This comparison is not to establish a single winner from amongst these great tools; rather, it is to help you more easily make your decision. All of these bundlers are definitely great tools managed by great people, and they are all super awesome in one way or another. To all the maintainers, contributors, sponsors, and backers, cheers


Configuring a bundle has been one of the most cursed yet most sophisticated areas in the frontend world. For small-scale applications, one might feel this should be very straightforward. Still, as the application’s size grows, we need more sophisticated configurations to keep our apps efficient and performant.

We have witnessed many debates among developers about how tedious it is to configure a modern-day tech stack for a small app. These debates and the common patterns subsequently adopted by a majority of the community have led many bundlers to offer zero-config solutions.

Though it’s claimed by almost all of these bundlers, being zero-config is not possible for any of them. It is more about being quickly configurable and keeping the configuration guides as comfortable as possible.

All of these bundlers have their reds and blues in this area. Here, we are sharing configs for generating distribution packages for React Facebook Pixel. It will give you a glimpse of how it looks like for each of these bundlers.


const path = require('path');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
  entry: ['./src/index.js'],
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'fb-pixel-webpack.js',
    libraryTarget: 'umd',
    library: 'ReactPixel',
  module: {
    rules: [
        use: 'babel-loader',
        test: /\.js$/,
        exclude: /node_modules/,
  resolve: {
    extensions: ['.js'],
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          warnings: false,
          compress: {
            comparisons: false,
          parse: {},
          mangle: true,
          output: {
            comments: false,
            ascii_only: true,
        parallel: true,
        cache: true,
        sourceMap: true,
    nodeEnv: 'production',
    sideEffects: true,


import babel from '@rollup/plugin-babel';
import { nodeResolve } from '@rollup/plugin-node-resolve';
import { terser } from 'rollup-plugin-terser';
import filesize from 'rollup-plugin-filesize';
import progress from 'rollup-plugin-progress';
import visualizer from 'rollup-plugin-visualizer';

export default {
  input: 'src/index.js',
  output: [
      file: 'dist/fb-pixel.js',
      format: 'cjs',
      name: 'ReactPixel',
      exports: 'named',
  plugins: [
    babel({ babelHelpers: 'bundled' }),
    // All of following are just for beautification, not required for bundling purpose


We didn’t need any configs for Parcel, as the default configs were enough to handle our library. Here is the command we used:

    "bundle:parcel": "parcel build src/index.js --experimental-scope-hoisting --out-file fb-pixel-parcel.js",

Here is my conclusion for this:

  • webpack still requires us to use ES5 syntax, which makes it a little problematic
  • Rollup has simpler syntax and looks ideal for managing libraries
  • Parcel v2 is coming up with configuration file support with awesome default configs to extend for sophisticated apps

#webpack #parcel #rollup #javascript #web-development

Modesto  Corwin

Modesto Corwin


Webpack, Rollup and Parcel Compared

Let’s build a React app using Webpack, Rollup and Parcel to compare these three bundlers.

Code: https://github.com/jherr/bundler-comparison

#webpack #parcel

Turner  Crona

Turner Crona


Webpack vs. Snowpack: Getting Started with Snowpack

Here’s a brief comparison between webpack and Snowpack and a step-by-step guide to getting started with Snowpack.

webpack has been a developer favorite for years because of its effective module bundling capabilities. However, 2019 saw the introduction of Snowpack, a lighter alternative to webpack that promised increased speed and ease of use. This article will walk you through a brief comparison between these two tools and provide a step-by-step guide to getting started with Snowpack.

What is webpack?

Since its initial release in 2012, webpack has gained widespread recognition as an essential tool for web development. Webpack is a module bundler that takes a large number of JavaScript files and transforms them into a single output file or a few smaller files that you can use to run your app.

Webpack creates a dependency graph that manages the dependency relationships between your modules. With the addition of loaders, the tool can also bundle other file types besides JavaScript, such as CSS, PNG, JPG, and more. This effectively allows you to add all of your static assets — along with your JavaScript — to the dependency graph, which saves you the extra effort it takes to manage each dependency manually.

Other benefits of webpack include:

  • Streamlining and elimination of unused assets
  • Flexible control over asset processing
  • Code splitting into several JavaScript output files for faster page loads

But the powerful complexity of webpack also comes with some drawbacks:

  • Difficult configuration process
  • Steep learning curve
  • Slow build times

What is Snowpack?

Introduced in 2019, Snowpack is a new-generation, front-end build tool for JavaScript applications. Compared to webpack, Snowpack is faster, more lightweight, and much easier to configure for beginners.

How does Snowpack compare with webpack?

Unlike webpack, Snowpack doesn’t need to go through an entire rebuild and re-bundle process every time you modify and save an asset file. Webpack’s time-intensive build process accounts for the delay you experience between saving your files and seeing your changes load in the browser. A few developers have even reported wait times as long as 12 minutes for larger apps.

Some people have devised clever workarounds for boosting the speed of webpack, such as upgrading the UglifyJsPlugin, jettisoning image loaders, rethinking caching strategies, and switching from node-sass to sass-loader, to name a few.

For those who can’t afford to take days out of your project schedule to analyze build performance and cobble together an optimization plan, Snowpack is a better option.

How does Snowpack work?

So what’s different about Snowpack? It uses JavaScript’s ES module system (ESM) to write your file changes directly and instantly to the browser with no wait time. As opposed to bundlers like webpack, Snowpack builds every one of your files once and then caches them. It only needs to rebuild a file when you make changes, and the rebuild happens for that single file only.

Snowpack lets you work in a lightning-fast, unbundled development environment and even lets you keep your final builds unbundled and runnable. You also have the option to support bundled builds when it comes time to roll your app out to production. All you have to do is add the right plugin for your favorite bundler, or even write your own using the Snowpack plugin API.

In short, Snowpack offers the following advantages over a traditional bundler tool like webpack:

  • Changes written instantly to the browser with no wait time for rebuilds
  • Efficient cache for no duplicate downloads
  • Ability to import modules from CDN servers, thanks to Snowpack’s ESM foundation
  • Simple and easy configuration process
  • Easy learning curve

To learn more about how Snowpack stacks up against webpack, check out our blog post.

Get started with Snowpack

You’ve done the research, you’ve compared the tools, and you’ve decided that Snowpack is the one for you. So how do you get started? Luckily, you’ve come to the right place.

In the rest of this article, we’ll guide you through the steps to migrate your development environment and get your app up and running with Snowpack.


Before you begin, check to ensure you have what you need to complete the setup. Thankfully, Snowpack’s requirements are minimal. To develop with the tool, you need:

  • A JavaScript app written with ESM-ready code
  • A modern browser that supports the ES module syntax, such as a recent release of Chrome, Firefox, or Edge

Tip: The modern browser requirement applies only to your development environment. Once you’ve created your final build with Snowpack and pushed it to production, users can view your site in any browser, modern or legacy.

1. Install Snowpack

You can use these installation commands:

With npm:

id="globalinstallation">global installation
npm install -g snowpack
local installation per project
npm install --save-dev snowpack

Snowpack’s creators recommend that you install locally rather than globally when possible.

With yarn:

local installation per project 
yarn add --dev snowpack

2. Start the Snowpack command-line interface (CLI)

There are three ways that you can run the Snowpack CLI locally:

  • Using the root package.json file
  • Using the npm command: npx snowpack
  • Using the yarn command: yarn snowpack

#webpack #snowpack #javascript #web-development #developer