Install

npm install @wasm-fmt/zig_fmt

npx jsr add @fmt/zig-fmt

Usage

Node.js / Deno / Bun / Bundler

import { format } from "@wasm-fmt/zig_fmt";

const source = `
const std = @import("std");
pub fn main() !void {
    std.debug.print("Hello, 世界", .{});
}
`;

const formatted = format(source);
console.log(formatted);

Web

For web environments, you need to initialize WASM module manually:

import init, { format } from "@wasm-fmt/zig_fmt/web";

await init();

const source = `
const std = @import("std");
pub fn main() !void {
    std.debug.print("Hello, 世界", .{});
}
`;

const formatted = format(source);
console.log(formatted);

Vite

import init, { format } from "@wasm-fmt/zig_fmt/vite";

await init();
// ...

Entry Points

• . - Auto-detects environment (Node.js uses node, Webpack uses bundler, default is ESM)
• ./node - Node.js environment (no init required)
• ./esm - ESM environments like Deno (no init required)
• ./bundler - Bundlers like Webpack (no init required)
• ./web - Web browsers (requires manual init)
• ./vite - Vite bundler (requires manual init)

Build from source

# 1. install Zig https://ziglang.org/download/

# 2. clone this repo
git clone https://github.com/wasm-fmt/zig_fmt.git

# 3. build
npm run build

# 4. test
npm run test:node