Doesn't work on latest Node

[aMyTimed]

it works with v14.8.0 with nvm, but with v18.5.0 or v19 (haven't tried others) it spits this out:

./node_modules/box2d-wasm/dist/umd/Box2D.simd.js:12

TypeError: Failed to parse URL from ./node_modules/box2d-wasm/dist/umd/Box2D.simd.wasm
    at Object.fetch (node:internal/deps/undici/undici:11413:11) {
  [cause]: TypeError [ERR_INVALID_URL]: Invalid URL

[ben-zabloski]

It appears to work with node v17.9.1 as well.

[8Observer8]

I had the same problem but @Birch-san helped me here #65

Solution:

init-box2d.js

import Box2DLib from "box2d-wasm";

export let box2d = null;

export function initBox2D() {
    return new Promise(resolve => {
        Box2DLib({
            locateFile: (url, scriptDirectory) => "file:///opt/render/project/src/node_modules/box2d-wasm/dist/umd/Box2D.simd.wasm"
        }).then((re) => {
            box2d = re;
            resolve();
        });
    });
}

app.js

import { box2d, initBox2D } from "./init-box2d.js";

async function init() {
    await initBox2D();

    const {
        b2Vec2,
        b2World
    } = box2d;

    const gravity = new b2Vec2(0, -3);
    const world = new b2World(gravity);
    const g = world.GetGravity();
    console.log("gravity = ", g);
}

init();

[ben-zabloski]

Looks good - I'll have to try it out! 😊

[8Observer8]

Small update for localhost:

import Box2DLib from "box2d-wasm";

export let box2d = null;

export function initBox2D(localhost = true) {
    return new Promise(resolve => {
        Box2DLib({
            locateFile: (url, scriptDirectory) => {
                if (url.endsWith(".wasm") && !localhost) {
                    return "file:///opt/render/project/src/node_modules/box2d-wasm/dist/umd/Box2D.simd.wasm";
                }
                return scriptDirectory + url;
            }
        }).then((re) => {
            box2d = re;
            resolve();
        });
    });
}

[8Observer8]

But my example is for deploying on Render.com hosting. You should change the path above to yours. I hope it will help.

[aMyTimed]

alright, ill add this to my fork