@noir-lang/noir_wasm

Noir Lang WASM JavaScript Package

This JavaScript package enables users to compile a Noir program, i.e. generating its artifacts, both in Node.JS environments and the browser.

The package also handles dependency management like how Nargo (Noir's CLI tool) operates, but the package is used just for compilation, not proving, verifying and simulating functions.

Usage

// Node.js

import { compile, createFileManager } from '@noir-lang/noir_wasm';

const fm = createFileManager(myProjectPath);
const myCompiledCode = await compile(fm);

// Browser

import { compile, createFileManager } from '@noir-lang/noir_wasm';

const fm = createFileManager('/');
for (const path of files) {
  await fm.writeFile(path, await getFileAsStream(path));
}
const myCompiledCode = await compile(fm);

Changelog

1.0.0-beta.11 (2025-08-19)

⚠ BREAKING CHANGES

• new semantic for bit-shifts (#9373)
• remove verify_proof from stdlib (#9472)

Features

• fuzz: Push and pop for slices (#9262) (ab345b2)
• Mark slice variants of ecdsa verification as deprecated (#9458) (5675aff)
• New semantic for bit-shifts (#9373) (f6fed8b)
• opt: Don't clone on array_len (#9440) (b7273d7)
• Remove saturating behaviour of signed bitshifts in brillig (#9532) (103f70a)
• Simplify bitshift logic to remove leftover overflow handling (#9506) (9062697)
• ssa_fuzzer: Hash blackbox functions (#9479) (4c65b51)
• ssa_fuzzer: Mode without instruction simplification + array instructions mutations + limits fix (#9438) (ea9c913)

Bug Fixes

• Allow calling private impl method defined on another module from… (#9449) (501988e)
• Assert types are not mutated in constant folding (#9481) (ee2ac1a)
• brillig_vm: Remove slice padding for foreign call inputs (#9321) (57778ea)
• brillig: Pass slice length to push and pop operations (#9507) (888f9a0)
• Guard Eq for [T] to avoid OOB on length mismatch (#9453) (b5a94e4)
• LSP: Don't crash on broken function definition (#9441) (e54057d)
• Remove shadowing in BoundedVec::any causing returning false unconditionally (#9478) (b51b616)
• Remove warning from std::verify_proof_with_type (#9474) (7503f37)
• security: Validate git references in GitHub dependency resolver (#9051) (e3a8e9f)
• ssa: Replace pop from 0-length slice with constraint and defaults (#9489) (20a6467)
• ssa: Replace side effects with defaults when disabled (#9462) (4f8dbbc)
• Sync len after map rebuilds in iter_mut/iter_keys_mut for HashMap and UHashMap (#9491) (12465f3)

Miscellaneous Chores

• Remove verify_proof from stdlib (#9472) (450ad5b)