aaroncql/wasm-primality-test

WASM Primality Test

This is a sample web application to test out the use of WASM compiled from Rust.

Tools required

• Yarn
• Rust
• Cargo
• wasm-pack

Building the WASM files

Source is written with Rust. Assuming that we are in the /is-prime directory, build for production using wasm-pack:

wasm-pack build --out-dir ../site/src/wasm --target web --release --no-typescript

This will compile, build, and output the WASM files directly within /site/src, which the web app can then import from.

• The target web is used as Rollup does not natively support bundling WASM files yet
• The --no-typescript is a workaround since building the website using yarn build with the TypeScript files will result in type errors

To build in debug mode and to log Rust panics into the browser console:

wasm-pack build --out-dir ../site/src/wasm --target web --debug

Developing the website

Source is written with TypeScript and Svelte, and uses Snowpack as its development tool.

Assuming we are within the /site directory, install all dependencies first:

yarn

Develop locally with hot reload:

yarn start

Build for production into /site/build:

yarn build