What is WebAssembly and how do I compile code to it?

What is WebAssembly and how do I compile code to it?

WebAssembly (Wasm) is a binary instruction format for a stack-based virtual machine. It allows code written in languages like C, C++, and Rust to run in web browsers at near-native speed. To compile code to WebAssembly, you typically use a compiler like Emscripten or Rust's built-in tools.

Can you explain how to use Emscripten for this?

Sure! First, you need to install Emscripten. Once installed, you can compile your C/C++ code using the command emcc yourfile.cpp -o output.js. This will generate a JavaScript file along with a WebAssembly module.

What are the benefits of using WebAssembly?

WebAssembly offers several benefits, including faster execution times, the ability to run code in multiple languages, and improved security. It also allows developers to leverage existing codebases in web applications.

Are there any limitations I should be aware of?

Yes, WebAssembly has some limitations, such as lack of direct access to the DOM and certain APIs. It also requires a JavaScript environment to run, as it cannot be executed directly by the browser.