When comparing Javascript / GitHub Electron vs OCaml, the Slant community recommends OCaml for most people. In the question“What are the best languages to write a desktop Linux application in?” OCaml is ranked 9th while Javascript / GitHub Electron is ranked 17th. The most important reason people chose OCaml is:
Functional programming is based on the lambda calculus. OCaml is in its functional parts almost pure lambda calculus, in a very practical manner: useful for many daily programming tasks. The acitve development makes improvements to the type system like generalized algebraic data types (GADT) or polymorphic variants, so when learning this language you get at once a down to earth usable compiler and advanced abstraction features.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Works on Linux, Windows, Mac
Being powered by Javascript, apps build with Electron can be packed to run on all 3 platforms.
Pro Wide spread support
Javascript is a very easy language to learn, and is handy for all manner of other things. There's a good chance you already know it, or that you will need to know it in the future.
Pro WebApps without additional work
If you don't require native features and could write a web app (i.e. a website with dynamic elements), then you could just extend it and turn it into a native app. This means that people just need to type your URL to use you app and may get more by downloading and installing it.
Pro Actively-developed functional programming language at the forefront of research
Functional programming is based on the lambda calculus. OCaml is in its functional parts almost pure lambda calculus, in a very practical manner: useful for many daily programming tasks. The acitve development makes improvements to the type system like generalized algebraic data types (GADT) or polymorphic variants, so when learning this language you get at once a down to earth usable compiler and advanced abstraction features.
Pro Encourages functional style
It steers you towards a functional style, but doesn't bother you with purity and "monads everywhere" like other languages, such as Haskell.
Pro No windows!
Strong focus on *nix systems, lacking native support for MS Windows
Lacks native support for Windows systems.
Pro Sophisticated and easy-to-use package manager
OPAM is a package manager for OCaml, which is really easy to use, just like npm. It creates a .opam folder in home directory.
The documentation is great as well, and you can switch between multiple versions of OCaml for each project. You can also package your project and publish it on OPAM repositories, even if the dependencies do not exists on OPAM.
Pro One of the best for writing compilers
OCaml is compiled to native binary, so it's amazingly fast. Being a member of ML-family languages, it has expressive syntax for trees, and has great LLVM support.
Pro Stable syntax
The syntax is consistent, some syntaxic sugar but at a reasonable level, so reading code of others isn't too much confusing.
Pro Strong editor integration
The merlin
editor tool provides all you need to develop OCaml in your favourite editor.
Cons
Con Low performance
Electron applications use significantly more CPU, RAM, and disk space than applications written in almost any other framework. This results in poor battery life as well as an unpleasant user experience.
Con Backwards incompatibility between versions
Electron is growing and constantly changing, but there is no care whatsoever whether the changes in a new version will break your application or not. Even if you write and maintain one app, changes to how Electron handles JS files and functions will make maintenance of a single app your full time job. Even the development process, programming mindset and tooling changes between versions, so there is no guarantee that your app will even have a proper architecture a year from when you've built it.
Con Strong focus on *nix systems, lacking native support for MS Windows
Lacks native support for Windows systems.