ReScriptJs

Bindings to the JS standard library

Goals

This is an alternative library to the default Js module.

Main differences:

• Closer naming to the JS platform (e.g. Object vs Obj)
• Type-first pipe
• Consistent naming accross the bindings
• Some missing data-structures (e.g. Map, WeakMap, Set, WeakSet, BigInt, Intl)
• A DX that overall looks more like JS (if you open Js, you should feel at home)
• Simple bindings to window, document and globalThis (they're basically typed as any)

Nearly all data structures maintain compatible types with the default Js module, with the exception of Promise, for which we add a second type parameter for rejection (but don't worry, we provide interop).

Installation

Run the following in your console:

$ yarn add rescript-js

Then add rescript-js to your bsconfig.json's bs-dependencies:

 {
   "bs-dependencies": [
+    "@ryyppy/rescript-promise",
+    "rescript-js"
   ]
 }

If you want to exclusively use rescript-js:

 {
   "bsc-flags": [
+    "-open ReScriptJs",
   ]
 }

Usage

open ReScriptJs.Js

Console.log("Hello world!")

let timeout = setTimeout(() => {
  Console.log("Hello!")
}, 100)

clearTimeout(timeout)

let array = [1, 2, 3]

let sum = array
  ->Array.map(x => x * 2)
  ->Array.reduce((acc, item) => acc + item, 0)

Available modules are listed in ReScriptJs.res