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System.js

21
8
+ 1
2
Webpack

33.1K
22.4K
+ 1
750
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System.js vs Webpack: What are the differences?

System.js: Dynamic ES module loader. It is a Universal Module Loader for JavaScript. If you've used RequireJs or a CommonJs bundler in the past, you have probably created modules.Configurable module loader enabling dynamic ES module workflows in browsers and NodeJS; Webpack: A bundler for javascript and friends. A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows to load parts for the application on demand. Through "loaders" modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.

System.js and Webpack can be categorized as "JS Build Tools / JS Task Runners" tools.

System.js and Webpack are both open source tools. Webpack with 50.3K GitHub stars and 6.37K forks on GitHub appears to be more popular than System.js with 9.75K GitHub stars and 852 GitHub forks.

Airbnb, Instagram, and Pinterest are some of the popular companies that use Webpack, whereas System.js is used by Canopy, Compass Inc., and One Negócios. Webpack has a broader approval, being mentioned in 2898 company stacks & 7288 developers stacks; compared to System.js, which is listed in 3 company stacks and 4 developer stacks.

Decisions about System.js and Webpack
Aleksandr Filatov
Contract Software Engineer - Microsoft · | 4 upvotes · 134.9K views
Why migrated?

I could define the next points why we have to migrate:

  • Decrease build time of our application. (It was the main cause).
  • Also jspm install takes much more time than npm install.
  • Many config files for SystemJS and JSPM. For Webpack you can use just one main config file, and you can use some separate config files for specific builds using inheritance and merge them.
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We mostly use rollup to publish package onto NPM. For most all other use cases, we use the Meteor build tool (probably 99% of the time) for publishing packages. If you're using Node on FHIR you probably won't need to know rollup, unless you are somehow working on helping us publish front end user interface components using FHIR. That being said, we have been migrating away from Atmosphere package manager towards NPM. As we continue to migrate away, we may publish other NPM packages using rollup.

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Pros of System.js
Pros of Webpack
  • 1
    Great plugin system
  • 1
    Loads anything trough AMD with the right plugin
  • 308
    Most powerful bundler
  • 182
    Built-in dev server with livereload
  • 142
    Can handle all types of assets
  • 87
    Easy configuration
  • 21
    Laravel-mix
  • 4
    Overengineered, Underdeveloped
  • 2
    Webpack-Encore
  • 2
    Makes it easy to bundle static assets
  • 1
    Redundant
  • 1
    Better support in Browser Dev-Tools

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Cons of System.js
Cons of Webpack
    Be the first to leave a con
    • 12
      Hard to configure
    • 3
      No clear direction
    • 2
      Spaghetti-Code out of the box
    • 2
      SystemJS integration is quite lackluster
    • 2
      Loader architecture is quite a mess (unreliable/buggy)
    • 2
      Fire and Forget mentality of Core-Developers

    Sign up to add or upvote consMake informed product decisions

    What is System.js?

    It is a Universal Module Loader for JavaScript. If you've used RequireJs or a CommonJs bundler in the past, you have probably created modules.Configurable module loader enabling dynamic ES module workflows in browsers and NodeJS.

    What is Webpack?

    A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows to load parts for the application on demand. Through "loaders" modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.

    Need advice about which tool to choose?Ask the StackShare community!

    What companies use System.js?
    What companies use Webpack?
    See which teams inside your own company are using System.js or Webpack.
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    Sign up to get full access to all the companiesMake informed product decisions

    What tools integrate with System.js?
    What tools integrate with Webpack?

    Sign up to get full access to all the tool integrationsMake informed product decisions

    What are some alternatives to System.js and Webpack?
    gulp
    Build system automating tasks: minification and copying of all JavaScript files, static images. More capable of watching files to automatically rerun the task when a file changes.
    Grunt
    The less work you have to do when performing repetitive tasks like minification, compilation, unit testing, linting, etc, the easier your job becomes. After you've configured it, a task runner can do most of that mundane work for you—and your team—with basically zero effort.
    rollup
    It is a module bundler for JavaScript which compiles small pieces of code into something larger and more complex, such as a library or application. It uses the new standardized format for code modules included in the ES6 revision of JavaScript, instead of previous idiosyncratic solutions such as CommonJS and AMD.
    Parcel
    Parcel is a web application bundler, differentiated by its developer experience. It offers blazing fast performance utilizing multicore processing, and requires zero configuration.
    Vite
    It is an opinionated web dev build tool that serves your code via native ES Module imports during dev and bundles it with Rollup for production.
    See all alternatives