Pipe operator parrotfill based on https://hacks.mozilla.org/2019/05/javascript-and-evidence-based-language-design/

cucumber.js

"use strict";

async function pipe(initial_value, ...funcs) {
	let current = initial_value;
	for(let func of funcs) {
		current = func(current);
		// If it's thenable, then it's probably a Promise
		if(typeof current.then == "function")
			current = await current;
	}
	return current;
}


function add(a, b) { return a + b; }
function make_message(x) { return `item: ${x}`; }
async function tokenise(x) { return x.split(/\s+/g); }

pipe(
	10,
	add.bind(null, 5),
	make_message,
	tokenise
).then(console.log);