with with

A simple way to use the JavaScript with statement in strict mode!

This is not a sandbox do not use it as a sandbox do not try to make it a sandbox. We will try this and fail so you don't have to. Done.

Please don't use this in production... Or out of production... We just love doing things that make TC39 hire hitmen.

Installation

Node

pnpm i with-with

Deno

import withWith from "https://deno.land/x/with/mod.ts";

Bun

bun i with-with

QuickJS

Cry.

Usage

let accessible = false;
const returnValue = withWith(
	{ hello: "there" },
	({ hello }) => {
		// You can get types via destructuring like `({ hello, etc }) =>`.
		// Destructuring is not required to access anything.

		// Logs `there`.
		console.log("hello", hello);

		// Variables from the parent scope are still accessible and can be mutated.
		accessible = true;

		// You can return as well and it will get passed back to the upper scope.
		return hello;
	},
	// This lifter enables your `with` wrapped function to be able to access all variables from the parent scope.
	{ lifter: (data) => eval(data.eval) }
);
console.log(returnValue, accessible);

Binding

withWith(
	{ hello: "there" },
	function () {
		console.log(this);
	},
	// No variables from the parent scope are accessed, so there's no need for a lifter.
	{ binding: { on: "this" } }
);