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CoffeeScript vs ES6: What are the differences?

Introduction: In the world of web development, CoffeeScript and ES6 (also known as ECMAScript 2015) are two popular scripting languages that compile to JavaScript. Despite having similar functionalities, there are key differences that set them apart.

1. **Syntax**: CoffeeScript employs a significant whitespace syntax familiar in Python, while ES6 retains the traditional curly brace syntax found in JavaScript, allowing for developers more comfortable with JavaScript to transition seamlessly.
2. **Feature Set**: ES6 offers a wider range of features and enhancements such as classes, arrow functions, and template literals that are not as robust or comprehensive in CoffeeScript.
3. **Compatibility with JavaScript**: ES6 is a strict superset of JavaScript, meaning ES6 code can directly utilize existing JavaScript libraries and functions without any compatibility issues, whereas CoffeeScript may sometimes require workarounds or modifications.
4. **Community Support**: ES6 has gained widespread adoption and support from the developer community and tooling, while CoffeeScript's popularity has gradually waned, resulting in fewer resources, updates, and community engagement.
5. **Built-in Promises**: ES6 includes built-in Promises for asynchronous operations, providing a more seamless and standardized approach compared to CoffeeScript where similar functionality may require additional libraries or custom implementations.
6. **Tooling and Debugging**: ES6 benefits from a more mature ecosystem with enhanced tools for debugging, profiling, and static code analysis, giving developers a more refined development experience compared to CoffeeScript. 

In Summary, the key differences between CoffeeScript and ES6 lie in their syntax, feature set, compatibility with JavaScript, community support, built-in promises, and tooling capabilities.
Decisions about CoffeeScript and ES6
Amir Mousavi

This post is a bit of an obvious one, as we have a web application, we obviously need to have HTML and CSS in our stack. Though specifically though, we can talk a bit about backward compatibility and the specific approaches we want to enforce in our codebase.

HTML : Not much explanation here, you have to interact with HTML for a web app. We will stick to the latest standard: HTML 5.

CSS: Again if we want to style any of our components within he web, we have to use to style it. Though we will be taking advantage of JSS in our code base and try to minimize the # of CSS stylesheets and include all our styling within the components themselves. This leaves the codebase much cleaner and makes it easier to find styles!

Babel: We understand that not every browser is able to support the cool new features of the latest node/JS features (such as redue, filter, etc) seen in ES6. We will make sure to have the correct Babel configuration o make our application backward compatible.

Material UI (MUI): We need to make our user interface as intuitive and pretty as possible within his MVP, and the UI framework used by Google will provide us with exactly that. MUI provides pretty much all the UI components you would need and allows heavy customization as well. Its vast # of demos will allow us to add components quickly and not get too hung up on making UI components.

We will be using the latest version of create-react-app which bundles most of the above along many necessary frameworks (e.g. Jest for testing) to get started quickly.

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For our front-end, React is chosen because it is easy to develop with due to its reusable components and state functions, in addition to a lot of community support. Because React is popular, it would be easy to hire for it here at our company MusiCore. Our team also has experience with React already. React can be written with ES6 and ES6 has a lot of popularity and versatility when it comes to creating classes and efficient functions. Node.js will be used as a runtime environment to compile the code. Node.js also has many different types of open-source packages that can help automate some of the tasks we want to do for the application. CSS 3 will be used to style components and is the standard for that.

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Aleksandr Filatov
Contract Software Engineer - Microsoft · | 3 upvotes · 214.2K views
How to make your JS code faster just adding some parenthesis?

Optimize-js I will not describe this tool a lot here, because it's already good done by author on github

I just want to mention that this tool wrap up all immediately-invoked functions or likely-to-be-invoked functions in parentheses what is do a great optimization a JavaScript file for faster initial execution and parsing (based on my experience).

The performance of application where I've introduced optimize-js improved on 20% in a common (tested in Chrome and IE11).

Why it happens?

Is it maintaining now? - Unfortunately, no (but feel free to send PR)

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Pros of CoffeeScript
Pros of ES6
  • 199
    Easy to read
  • 179
    Faster to write
  • 126
    Syntactic sugar
  • 104
    Readable
  • 104
    Elegant
  • 73
    Pretty
  • 53
    Javascript the good parts
  • 48
    Open source
  • 44
    Classes
  • 35
    "it's just javascript"
  • 16
    Compact code
  • 15
    Easy
  • 13
    Simple
  • 13
    Not Javascript
  • 2
    Does the same with less code
  • 1
    I'm jobs I'm software engineer
  • 109
    ES6 code is shorter than traditional JS
  • 52
    Module System Standardized
  • 2
    Extremly compact
  • 2
    Destructuring Assignment

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Cons of CoffeeScript
Cons of ES6
  • 3
    No ES6
  • 1
    Corner cases in syntax
  • 1
    Parentheses required in 0-ary function calls
  • 1
    Unclear what will be grouped to {…}
  • 1
    Create Node.js
  • 1
    Suffers from baggage

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What is CoffeeScript?

It adds syntactic sugar inspired by Ruby, Python and Haskell in an effort to enhance JavaScript's brevity and readability. Specific additional features include list comprehension and de-structuring assignment.

What is ES6?

Goals for ECMAScript 2015 include providing better support for large applications, library creation, and for use of ECMAScript as a compilation target for other languages. Some of its major enhancements include modules, class declarations, lexical block scoping, iterators and generators, promises for asynchronous programming, destructuring patterns, and proper tail calls.

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What companies use CoffeeScript?
What companies use ES6?
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What are some alternatives to CoffeeScript and ES6?
JavaScript
JavaScript is most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic,and supports object-oriented, imperative, and functional programming styles.
TypeScript
TypeScript is a language for application-scale JavaScript development. It's a typed superset of JavaScript that compiles to plain JavaScript.
Babel
Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
jQuery
jQuery is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML.
Python
Python is a general purpose programming language created by Guido Van Rossum. Python is most praised for its elegant syntax and readable code, if you are just beginning your programming career python suits you best.
See all alternatives