hometools
Rust

Hello, World in Rust WASM

April 2026

This is a basic `Hello, World` WASM app written in rust.

Rust

Cargo.toml
[package]
name = "hello-world"
version = "0.1.0"
edition = "2024"

[lib]
crate-type = ["cdylib"]

[dependencies]
wasm-bindgen = "0.2.116"
src/lib.rs
use wasm_bindgen::prelude::*;

#[wasm_bindgen]
pub fn hello_world() -> String {
  "Hello, world!".to_string()
}
build script
#!/bin/bash

wasm-pack build --target web

HTML

page.html
<script type="module" src="/rust/wasm/hello-world/hello-world.js"></script>
<div id="output"></div>

JavaScript

hello-world.js
import init, { hello_world } from "./pkg/hello_world.js";

async function main() {
  await init();
  const el = document.querySelector("#output");
  el.innerHTML = hello_world();
}

main();

Output