functionalscript/types/function/test.f.js

FunctionalScript is a purely functional subset of JavaScript

import { fn } from "./module.f.js";
export default () => {
    const f = x => [x];
    const g = ([x]) => [x.length];
    const w = ([x]) => x;
    const r = fn(f).then(g).then(w).result;
    const result = r('hello');
    if (result !== 5) {
        throw r;
    }
};