How to import a npm package that relies on Wasm

I'm trying to import npm:@biscuit-auth/biscuit-wasm@0.4.0 and I wrote the following script:

import * as biscuitAuth from "npm:@biscuit-auth/biscuit-wasm@0.4.0";

const root = new biscuitAuth.KeyPair();
console.log(root);

import * as biscuitAuth from "npm:@biscuit-auth/biscuit-wasm@0.4.0";

const root = new biscuitAuth.KeyPair();
console.log(root);

However, I get the following error:

error: Unable to load  ~/.cache/deno/npm/registry.npmjs.org/@biscuit-auth/biscuit-wasm/0.4.0/module/biscuit_bg.wasm imported from ~/.cache/deno/npm/registry.npmjs.org/@biscuit-auth/biscuit-wasm/0.4.0/module/biscuit.js

Caused by:
    stream did not contain valid UTF-8

error: Unable to load  ~/.cache/deno/npm/registry.npmjs.org/@biscuit-auth/biscuit-wasm/0.4.0/module/biscuit_bg.wasm imported from ~/.cache/deno/npm/registry.npmjs.org/@biscuit-auth/biscuit-wasm/0.4.0/module/biscuit.js

Caused by:
    stream did not contain valid UTF-8

Looking at this stackoverflow post https://stackoverflow.com/questions/43122335/what-does-stream-did-not-contain-valid-utf-8-mean tells me that this error message comes from rust directly. Separately, I also tried out the following in node js:

import { KeyPair } from '@biscuit-auth/biscuit-wasm';

const root = new KeyPair();

console.log(root);

import { KeyPair } from '@biscuit-auth/biscuit-wasm';

const root = new KeyPair();

console.log(root);

and ran it with

node --experimental-wasm-modules  run.js

node --experimental-wasm-modules  run.js

and it ran fine with no issues:

(node:11768) ExperimentalWarning: Importing WebAssembly modules is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
biscuit-wasm loading
KeyPair { ptr: 1539832 }

(node:11768) ExperimentalWarning: Importing WebAssembly modules is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
biscuit-wasm loading
KeyPair { ptr: 1539832 }

Could this be part of the solution? Does deno have a --experimental-wasm-modules or something similar that I need to use, or is this an issue with how Deno imports wasm packages from npm?

Stack Overflow

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