Using Capacitor Plugins from Rust/WASM

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Mobile: A different way using Rust?

Capacitor is normally used in combination with JavaScript projects, so there is little help available if you want to use it in a Rust/WASM project. Worry not! That’s exactly what we’ll take a look at in this post.

Since Capacitor is a JS framework there will be a little extra work involved in interacting with any plugins, but it’s honestly not a lot we need to do. Let’s take a quick tour through what I’ve set up in the example repository https://github.com/Tehnix/template-mobile-wasm.

We’ve set up four crates:

• appy: Our Leptos App, Capacitor, and the XCode project
• capacitor-rs: Bridging code between the Capacitor JS library and our Rust code
• shared: Our shared code that we might use in appy, and also want to expose in Swift to use in our Widgets or watchOS App
• mobile: Where we will generate the Swift bindings from via UniFFI, reexporting everything from shared that’s made available to UniFFI via the macros

In this post we’ll focus on the capacitor-rs and appy crates, which contain our Capacitor bridge…