Transforming your codebase to include all data types and functions from dependencies may seem daunting, but it is achievable. While it may require some effort, it is definitely within reach. For instance, when dealing with Reflect.defineMetadata() from the reflect-metadata package:
#[allow(non_snake_case)]
mod Reflect {
use wasm_bindgen::prelude::*;
#[wasm_bindgen]
extern "C" {
#[wasm_bindgen(js_namespace = Reflect)]
pub fn defineMetadata(metadataKey: &str, metadataValue: JsValue, target: &JsValue);
}
}
You can adapt all functions, even ones like Node.js' require(), in a similar manner. Take cues from established libraries like js-sys and web-sys to understand how they declare functionality.
It's important to note that reflect-metadata is primarily a reflection library for JavaScript, not specifically built for WASM. Its utility may be limited when attempting to add metadata to Rust objects instead of JS objects.
Moreover, if your code heavily relies on JavaScript libraries, transitioning to WASM may not necessarily result in a speed enhancement; in fact, it could potentially slow down the process. Improved performance with Rust and WASM is typically seen in scenarios involving intensive computations or memory allocation that can be optimized efficiently.