wasm-demo

Demo of cairo-rs on WebAssembly

While cairo-rs is compatible with WebAssembly, it doesn't implement any bindings to it. Instead, create a new WebAssembly crate with cairo-rs as a dependency and implement the required functionality there.

Since mimalloc is not automatically compilable to WebAssembly, the cairo-rs dependency should disable the default features, which will in turn disable mimalloc.

A working example is provided in this repository.

Dependencies

To compile and run the example you need:

• a Cairo 0 compiler
• the wasm-pack crate
• some HTTP server (for example: the live-server npm module)

Note The first two dependencies can be installed via the repository's installation script (see "Installation script")

Building

To build the example, first compile your Cairo program:

cairo-compile src/array_sum.cairo --no_debug_info --output src/array_sum.json

And then the WebAssembly package:

wasm-pack build --target=web

This will generate a javascript module that is directly loadable by the browser.

Running

To run the example webpage, you need to run an HTTP server. For example, using the live-server npm module:

# while in <repo>/examples/wasm-demo
npx live-server

Warning Trying to run index.html directly (i.e. URL starts with file://) will result in a CORS error.