How do I mount multiple wasm components to a page?

When developing web applications, you may need to integrate multiple WebAssembly (Wasm) components into a single page to enable diverse functionalities. This can be achieved through the following steps:

1. Prepare Wasm Modules

First, ensure you have multiple compiled Wasm modules. Typically, these modules are compiled from different source codes (such as C, C++, Rust, etc.). Each module should be designed to handle a specific set of functionalities independently.

2. Load Wasm Modules

For each Wasm module, load them individually within the web page. This can be done using JavaScript's WebAssembly.instantiateStreaming method or a combination of fetch and WebAssembly.instantiate. For example:

javascript
// Load Wasm modules using fetch and WebAssembly.instantiate
async function loadWasmModule(url) {
    const response = await fetch(url);
    const buffer = await response.arrayBuffer();
    const module = await WebAssembly.instantiate(buffer);

    return module.instance.exports;
}

const module1 = loadWasmModule('path/to/module1.wasm');
const module2 = loadWasmModule('path/to/module2.wasm');

3. Use Wasm Modules in the Page

After loading the modules, invoke the exported functions of the Wasm modules in JavaScript to implement desired functionalities on the page. For instance, if a module is an image processing library, you can call it to process images directly within the page.

4. Ensure Modules Run Independently

Each Wasm module must operate independently without interfering with other modules. Guarantee that their memory spaces and any global states remain isolated.

5. Integrate Module Outputs

Display or process outputs from different Wasm modules on the page. This can be done by rendering results directly in the DOM or passing data to other Wasm modules for further processing.

Example Case

Suppose you have a Wasm module for image processing and another for audio processing. The image module adjusts the brightness and contrast of uploaded images in real-time on the web page, while the audio module manages the volume and effects of background music. Users can upload images and select music, with the web page instantly displaying the processed results.

By following these steps, you can effectively integrate both modules into the same page while maintaining non-interfering operations, providing a rich user interaction experience.

Conclusion

Integrating multiple Wasm modules into a single page is a powerful approach that leverages Wasm's performance advantages while delivering diverse web application functionalities. With proper module loading and management, you can ensure efficient and stable page operation.