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.

Installation

Node/Bun

pnpm install with-with

Deno

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

QuickJS

Cry.

Usage

let accessible = false;
const returnValue = withWith(
    { hello: "there" },
    ({ hello }) => {
        // You can get types via destructuring like `() => ({ hello, etc }) =>`.

        // 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: (k) => eval(k) }
);
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" } }
);