ECMAScript and Node requirements

The goal of the document is to list features we rely on for the runtime and the generated code. Features are grouped by ECMAScript version.

ECMAScript 2015 - ES6

rest parameters

added in Nodejs 6

Object.assign

added In Nodejs 4

ArrowFunction

for wasm_of_ocaml

TypedArray

to implement bigarray

ECMAScript 2016

Async/Await

for wasm_of_ocaml

ECMAScript 2020

globalThis

added in Nodejs 12
polyfill-ed in the repo

ECMAScript 2021

WeakRef to implement weak and ephemeron

added in Nodejs 14.6
optional

Node

Namespaced require `require("node:fs")`

added in Nodejs 16