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Parcel VS RequireJS

Compare Parcel VS RequireJS and see what are their differences

Parcel logo Parcel

Blazing fast, zero configuration web application bundler

RequireJS logo RequireJS

RequireJS is a JavaScript file and module loader.
  • Parcel Landing page
    Landing page //
    2021-12-13
  • RequireJS Landing page
    Landing page //
    2019-09-19

Parcel features and specs

  • Zero Configuration
    Parcel requires minimal to no configuration to get started, making it extremely user-friendly, especially for beginners or small projects.
  • Fast Bundling
    Parcel uses worker threads to parallelize tasks, which significantly speeds up the bundling process compared to other bundlers that do not use this approach.
  • Out-of-the-box support for many file types
    Parcel supports many file types (e.g., JavaScript, CSS, HTML, images) right out-of-the-box without needing additional plugins or configurations.
  • Hot Module Replacement (HMR)
    Parcel offers built-in HMR, allowing developers to see changes in real-time without needing to refresh the browser, leading to a faster development cycle.
  • Tree Shaking
    Parcel automatically performs tree shaking, removing unused code from the production build to reduce file sizes, which can improve loading times.
  • Code Splitting
    Parcel has automatic code splitting capabilities which help to improve performance by loading only the necessary assets.
  • Extensible via Plugins
    Parcel’s plugin system allows developers to extend its functionality easily if custom or additional features are needed.

Possible disadvantages of Parcel

  • Community and Ecosystem
    The community and ecosystem around Parcel are smaller compared to other bundlers like Webpack, so finding solutions and third-party plugins might be more challenging.
  • Limited Customization
    While the zero-config aspect is beneficial, it also means there are fewer customization options out-of-the-box, which might be limiting for complex projects needing specific configurations.
  • Performance with Large Projects
    For very large projects, Parcel's performance can become a bottleneck, particularly when it comes to initial build times.
  • Documentation
    The documentation, while improving, is not as comprehensive as some other tools, making it harder for developers to find detailed information when they encounter issues.
  • Dependency Bloat
    Parcel can sometimes include more dependencies than necessary in the final bundle, potentially increasing the final bundle size.

RequireJS features and specs

  • Modularization
    RequireJS encourages a modular approach to development by allowing developers to define dependencies between JavaScript files. This modularization leads to cleaner code and easier maintenance.
  • Asynchronous Loading
    Scripts are loaded asynchronously, which can lead to improved performance. This non-blocking nature ensures that the web page remains responsive while scripts are still being loaded.
  • Dependency Management
    RequireJS automatically manages dependencies, ensuring that each module is loaded in the correct order. This reduces the risk of runtime errors caused by missing or incorrectly ordered scripts.
  • AMD Standard
    It implements the Asynchronous Module Definition (AMD) API, which promotes compatibility between different JavaScript libraries that conform to this standard.
  • Optimization Tools
    RequireJS includes optimization tools that can concatenate and minify JavaScript files, reducing the number of HTTP requests and file size for production environments.

Possible disadvantages of RequireJS

  • Learning Curve
    For developers not familiar with AMD or module loaders, RequireJS can introduce complexity and have a steep learning curve compared to simpler script-loading methods.
  • Not ES6 Module Compatible
    RequireJS is designed around the AMD pattern and does not natively support ES6 module syntax, which has become the standard in modern JavaScript development.
  • Overhead
    Although it offers powerful features, RequireJS introduces some initial setup and configuration overhead, which can be cumbersome for small projects or scripts.
  • Compatibility Issues
    Some older libraries or scripts might not be compatible with RequireJS without modifications, leading to potential integration issues when using certain third-party libraries.
  • Declining Popularity
    With the adoption of native ES6 modules and modern build tools like Webpack and Parcel, RequireJS is less commonly used, potentially reducing community support and resources.

Analysis of Parcel

Overall verdict

  • Parcel is a good choice for developers looking for a hassle-free, efficient, and beginner-friendly bundler. Its minimal configuration approach and speed make it ideal for small to medium-sized projects. However, for highly complex projects that require intricate and highly customized build processes, other bundlers might be more suitable due to their advanced configuration capabilities.

Why this product is good

  • Parcel is a web application bundler that is appreciated for its simplicity and zero-config philosophy. It automatically detects the files needed for a project without requiring a complex configuration file. Its fast performance is attributed to parallelization and efficient caching. Additionally, Parcel offers out-of-the-box support for JavaScript, CSS, HTML, asset management, and various types of file transformations, making it a versatile tool for web developers.

Recommended for

  • Developers new to module bundlers or looking for an easy-to-setup tool.
  • Projects that value speed and simplicity in their build processes.
  • Developers who need a bundler capable of handling multiple asset types with minimal configuration.
  • Teams that prefer convention over configuration and want to get started quickly without diving deep into complex bundler settings.

Analysis of RequireJS

Overall verdict

  • RequireJS is considered a robust solution for legacy projects or for teams who started their development process before JavaScript standards evolved. However, with the introduction and adoption of native ES6 modules and tools like Webpack and Rollup, RequireJS has become less relevant for new projects. It's a good solution if you are maintaining an older codebase and need consistency, but for new projects, modern alternatives may be more appropriate.

Why this product is good

  • RequireJS is a JavaScript file and module loader designed to improve the speed and quality of your code. It has been particularly beneficial in managing dependencies and loading scripts asynchronously, which helps optimize performance by loading only the necessary modules when needed. RequireJS was a popular choice when JavaScript development environments needed a reliable way to modularize code before the widespread adoption of ES6 modules.

Recommended for

    RequireJS is recommended for projects that are already using it, especially if the project is large and refactoring to a different module system would be resource-intensive. It can also be suitable for legacy web applications that have complex dependency chains which have been built with AMD (Asynchronous Module Definition) patterns. However, newer projects are better served with modern bundlers and native ES6 module syntax.

Parcel videos

Danby Parcel Guard Smart Mailbox blogger Review

More videos:

  • Review - PARCEL MOVIE REVIEW | SASWATA CHATTERJEE | RITUPARNA SENGUPTA | RUPAM'S REVIEW
  • Review - Le Parcel Box review

RequireJS videos

Optimize Your CSS With RequireJS

More videos:

  • Review - RequireJS and Magento2
  • Review - Yeoman 1.0 Backbone RequireJS - Video 2

Category Popularity

0-100% (relative to Parcel and RequireJS)
Web Application Bundler
86 86%
14% 14
JS Build Tools
72 72%
28% 28
Assets Bundler
100 100%
0% 0
Front End Package Manager

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Parcel and RequireJS

Parcel Reviews

Rollup v. Webpack v. Parcel
Parcel's caching feature sees dramatically decreases in time consumption after the initial run. For frequent, small changes, in smaller projects **Parcel*8 is a great choice.
Source: x-team.com
If you’ve ever configured Webpack, Parcel will blow your mind!
document.body.className = document.body.className.replace(/(^|\s)is-noJs(\s|$)/, "$1is-js$2")HomepageHomepageJavascriptBecome a memberSign inGet startedIf you’ve ever configured Webpack, Parcel will blow your mind!And how to hit the ground running with Parcel.Ibrahim ButtBlockedUnblockFollowFollowingMar 16, 2018Click here to share this article on LinkedIn »Zero...
Source: medium.com
First impressions with Parcel JS
The big selling point of Parcel though is that it offers a zero configuration experience. This means all the features are available out of the box! It also boasts blazing fast bundle times 👟 You won’t be configuring how Parcel works or having to draft in various plugins to get started. If you do need something, Parcel magically detects this and will pull in stuff for you on...
Source: codeburst.io
Parcel vs webpack - Jakob Lind
Parcel has made their own benchmarks of Parcel and other bundlers. Parcel has been criticized because they have not made the benchmarks open source. People cannot verify that the benchmarks are true when they are not open source.

RequireJS Reviews

We have no reviews of RequireJS yet.
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Social recommendations and mentions

Based on our record, Parcel should be more popular than RequireJS. It has been mentiond 113 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Parcel mentions (113)

  • Migrating a JavaScript Project from Prettier and ESLint to BiomeJS
    Https://parceljs.org/ is another. It even supports languages like `` out of the box which is pretty cool. IIRC it downloads necessarily plugins on the fly. - Source: Hacker News / 29 days ago
  • Create React App is Deprecated – What’s Next ?
    Parcel is another alternative that requires zero configuration and is super fast. If you want a simple React setup without any hassle, Parcel is a great choice. - Source: dev.to / 3 months ago
  • Bun 1.2 Is Released
    From its documentation [1] it looks a lot like a parceljs replacement [2], i.e. a zero config bundler which processes and bundles the dependencies in .html pages. So great for simple websites, not for replacing an entire Vite stack. [1] https://bun.sh/docs/bundler/fullstack [2] https://parceljs.org. - Source: Hacker News / 4 months ago
  • What is Evan You doing by creating VoidZero, and what are the issues with JS toolchains?
    Packagers are the ones we most frequently come into contact with, such as Webpack Vite and Parcel. The latter may not be commonly used, but it is also a well-established tool. - Source: dev.to / 6 months ago
  • Node.js: A brief history of cjs, bundlers, and esm
    Npm packages dramatically sped up the productivity of developers by being able to leverage other developers' work. However, it had a major disadvantage: cjs was not compatible with web browsers. To solve this problem, the concept of bundlers was born. Browserify was the first bundler which essentially worked by traversing an entry point and "bundling" all the require()-ed code into a single .js file compatible... - Source: dev.to / 6 months ago
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RequireJS mentions (12)

  • Why hasn't JavaScript implemented namespaces yet?
    There is a library called requirejs (https://requirejs.org/) that accomplishes what I am referring to. However, this is essentially similar to the situation in PHP prior to version 5.3 - a solution implemented at the level of a separate library rather than at the language level. Source: about 2 years ago
  • Getting Started With Parcel.js: A Web Application Bundler in 2022
    Webpack is the most popular bundler and it followed on the heels of Require.js, Rollup, and similar solutions. But the learning curve for a tool like webpack is steep. Getting started with webpack isn’t easy due to its complex configurations. As a result, in recent years another solution has emerged. This tool is not necessarily a front-runner, but an easier-to-digest alternative on the front-end module bundler... - Source: dev.to / over 2 years ago
  • RequireJS: How to define modules that contain a single "class"?
    I have a number of JavaScript "classes" each implemented in its own JavaScript file. For development those files are loaded individually, and for production they are concatenated, but in both cases I have to manually define a loading order, making sure that B comes after A if B uses A. I am planning to use RequireJS as an implementation of CommonJS Modules/AsynchronousDefinition to solve this problem for me... Source: about 3 years ago
  • When to use Requirejs and when to use bundled javascript?
    This may be a dumb question for web guys. But I am a little confused over this. Now, I have an application where I am using a couple of Javascript files to perform different tasks. Now, I am using Javascript bundler to combine and minify all the files. So, at runtime there will be only one app.min.js file. Now, Requirejs is used to load modules or files at runtime. So, the question is if I already have all things... Source: about 3 years ago
  • JavaScript Module Formats and Tools
    AMD (Asynchronous Module Definition), is a pattern to define and consume module. It is implemented by RequireJS library. AMD provides a define function to define module, which accepts the module name, dependent modules’ names, and a factory function:. - Source: dev.to / about 3 years ago
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What are some alternatives?

When comparing Parcel and RequireJS, you can also consider the following products

Webpack - Webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset.

JSHint - New JSHint website. Anton Kovalyov Oct 1st, 2013. For the last couple of weeks I've been working on a new homepage for JSHint and today I'm proud to announce the new jshint. com! JSHint Website.

rollup.js - Rollup is a module bundler for JavaScript which compiles small pieces of code into a larger piece such as application.

npm - npm is a package manager for Node.

esbuild - An extremely fast JavaScript bundler and minifier

AfterShip - AfterShip is the shipment tracking API for ecommerce businesses and marketplaces.