import.meta.resolve() polyfill

🎯 Standard synchronous import.meta.resolve() for anywhere
💡 Inspired by wooorm/import-meta-resolve

⏱ Completely synchronous, just like in the browser
🔃 Works with --loader stuff too!
🌳 Don't need to --experimental-import-meta-resolve
🦄 Importable as a ponyfill or polyfill
🧅 Works in Node.js, Bun, Deno, and the browser too

Installation

You can install this package from npm using npm, Yarn, pnpm, or your other favorite npm package manager. 😎

npm install @webfill/import-meta-resolve

If you're using Deno, you can use the npm: specifier or a Deno-compatible npm CDN like esm.sh

import {} from "npm:@webfill/import-meta-resolve";
import {} from "https://esm.sh/@webfill/import-meta-resolve";

If you want to use this package in the browser (🎗️ import.meta.resolve() is well supported in browsers) you can import it directly from an npm CDN like esm.sh or jsDelivr.

import {} from "https://esm.sh/@webfill/import-meta-resolve";
import {} from "https://esm.run/@webfill/import-meta-resolve";

Usage

This package exists primarily to smooth over the different names, signatures, and return values among Bun, Deno, Node.js, and the browser.

import resolve from "@webfill/import-meta-resolve";

console.log(resolve(import.meta, "is-odd"));
//=> file:///awesome-project/node_modules/is-odd/index.js
// OR using import maps in a browser:
//=> https://esm.run/is-odd

console.log(resolve(import.meta, "./lib.js"));
//=> file:///awesome-project/lib.js
// OR when in a browser:
//=> https://localhost:8080/lib.js

import polyfill from "@webfill/import-meta-resolve/polyfill.js";
polyfill(import.meta);

console.log(import.meta.resolve("is-odd"));
//=> file:///awesome-project/node_modules/is-odd/index.js
// OR using import maps in a browser:
//=> https://esm.run/is-odd

console.log(import.meta.resolve("./lib.js"));
//=> file:///awesome-project/lib.js
// OR when in a browser:
//=> https://localhost:8080/lib.js

⚠️ The two-argument import.meta.resolve(specifier, parentURL) is only supported on Node.js and Bun! This behaviour cannot be replicated (easily) elsewhere like in Deno or the browser right now. Check out whatwg/html#8077 if you're interested in the standardization discussion.

import polyfill from "@webfill/import-meta-resolve/polyfill.js";
polyfill(import.meta);

console.log(import.meta.resolve("is-odd"));
//=> file:///awesome-project/node_modules/is-odd/index.js

console.log(import.meta.resolve("is-odd", "file:///different-project/app.js"));
//=> file:///different-project/node_modules/is-odd/index.js