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Erlang vs JavaScript: What are the differences?

Erlang: A programming language used to build massively scalable soft real-time systems with requirements on high availability. Some of Erlang's uses are in telecoms, banking, e-commerce, computer telephony and instant messaging. Erlang's runtime system has built-in support for concurrency, distribution and fault tolerance. OTP is set of Erlang libraries and design principles providing middle-ware to develop these systems; JavaScript: Lightweight, interpreted, object-oriented language with first-class functions. 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.

Erlang and JavaScript can be primarily classified as "Languages" tools.

"Real time, distributed applications" is the top reason why over 49 developers like Erlang, while over 1556 developers mention "Can be used on frontend/backend" as the leading cause for choosing JavaScript.

Erlang is an open source tool with 7.74K GitHub stars and 2.1K GitHub forks. Here's a link to Erlang's open source repository on GitHub.

Airbnb, Instagram, and ebay are some of the popular companies that use JavaScript, whereas Erlang is used by AdRoll, Grooveshark, and Heroku. JavaScript has a broader approval, being mentioned in 5080 company stacks & 6471 developers stacks; compared to Erlang, which is listed in 70 company stacks and 47 developer stacks.

- No public GitHub repository available -

What is Erlang?

Some of Erlang's uses are in telecoms, banking, e-commerce, computer telephony and instant messaging. Erlang's runtime system has built-in support for concurrency, distribution and fault tolerance. OTP is set of Erlang libraries and design principles providing middle-ware to develop these systems.

What is 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.

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    What are some alternatives to Erlang and JavaScript?
    Elixir
    Elixir leverages the Erlang VM, known for running low-latency, distributed and fault-tolerant systems, while also being successfully used in web development and the embedded software domain.
    Haskell
    Go
    Go is expressive, concise, clean, and efficient. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel type system enables flexible and modular program construction. Go compiles quickly to machine code yet has the convenience of garbage collection and the power of run-time reflection. It's a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.
    Clojure
    Clojure is designed to be a general-purpose language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming. Clojure is a compiled language - it compiles directly to JVM bytecode, yet remains completely dynamic. Clojure is a dialect of Lisp, and shares with Lisp the code-as-data philosophy and a powerful macro system.
    OCaml
    It is an industrial strength programming language supporting functional, imperative and object-oriented styles. It is the technology of choice in companies where a single mistake can cost millions and speed matters,
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    Decisions about Erlang and JavaScript
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    Interest over time
    Reviews of Erlang and JavaScript
    Review ofJavaScriptJavaScript

    excellent!!

    How developers use Erlang and JavaScript
    Avatar of Andrew Faulkner
    Andrew Faulkner uses JavaScriptJavaScript

    Almost the entire app was written in Javascript, with JSON-based configuration and data storage. The following components were written and/or configured with Javascript:

    • Most server-side scripts, all unit tests, all build tools, etc. were driven by NodeJS.
    • ExpressJS served as the 'backend' server framework.
    • MongoDB (which stores essential JSON) was the main database.
    • MongooseJS was used as the main ORM for communicating with the database, with KnexJS used for certain edge cases.
    • MochaJS, ChaiJS, and ExpectJS were used for unit testing.
    • Frontend builds were done with Gulp and Webpack.
    • Package management was done primarily with npm - with a few exceptions that required the use of Bower (also configured with JSON).
    • "Templating" was done with Javascript dialect JSX.
    • The frontend was build primarily with ReactJS (as the View) and Redux (as the Controller / Store / frontend model).
    • Configuration was done with json files.

    The only notable exceptions were the use of SCSS (augmented by Compass) for styling, Bash for a few basic 'system chores' and CLI utilities required for development of the app (most notably git and heroku's CLI interface), and a bit of custom SQL for locations where the ORM extractions leaked (the app is DB-agnostic, but a bit of SQL was required to fill gaps in the ORMs when interfacing with Postgres).

    Avatar of OutSystems
    OutSystems uses JavaScriptJavaScript

    Read more on how to extend the OutSystems UI with Javascript here.

    OutSystems provides a very simple to use AJAX mechanism. However, developers can also use JavaScript extensively to customize how users interact with their applications, to create client side custom validations and dynamic behaviors, or even to create custom, very specific, AJAX interactions. For example, each application can have an application-wide defined JavaScript file or set of files included in resources. Page-specific JavaScript can also be defined.

    Avatar of Gorka Llona
    Gorka Llona uses JavaScriptJavaScript

    This GNU/GPL licensed Javascript library allows you to draw complex organizational charts that can't be drawn using Google's tool or equivalents. Orgchart structures are specified with JSON and can be generated on-the-fly by server-side scripts and databases. Events can be attached to clicks over the boxes. Multiple options can be defined; look at the repo for examples. This 1300-code-lines software component with contributors from 8 countries (and others for which I have to integrate their works) appears in the first page of Google Search results when searching for "Javascript Organizational Chart Library".

    Avatar of Cloudcraft
    Cloudcraft uses JavaScriptJavaScript

    JavaScript gets a bad rep, quite undeservedly so in my opinion. Today, JS is closer to functional languages than to the traditional-OO languages, and when used as such provides a great development experience. The pace of development is just picking up with transpilers like Babel making future advanced language features available to the masses today. At Cloudcraft.co, we write 100% of both the front-end (with React) and the backend (with Node.js) in Javascript, using the latest ES6 and even some ES7 features. This is not your grandfather's Javascript!

    Avatar of MOKA Analytics
    MOKA Analytics uses JavaScriptJavaScript

    The application front-end is written in JavaScript (ES6). We originally selected it over TypeScript because many library typings at the time were still flaky and the transpilation time was slow.

    We are now re-considering TypeScript because 1) the tooling has improved significantly, and 2) and the root cause of the majority of our front-end bugs are related to typing (despite having PropTypes).

    Avatar of Analytical Informatics
    Analytical Informatics uses ErlangErlang

    The central business logic and ETL engine is written in Erlang.

    Avatar of Mathias Vonende
    Mathias Vonende uses ErlangErlang

    Very nice programming language, used for backend integration.

    Avatar of Ryan Jennings
    Ryan Jennings uses ErlangErlang

    foundation VM for phoenix framework

    Avatar of Software Joint
    Software Joint uses ErlangErlang

    Cowboy web server serves content

    Avatar of KongHack Inc.
    KongHack Inc. uses ErlangErlang

    Custom plugins for ejabberd

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