Creating a Memory Object in JavaScript to Use in the Rust App
Explore how to create a memory object in JavaScript to use with Rust applications compiled to WebAssembly. Understand the importance of explicit memory allocation and freeing, create typed arrays to interact with WebAssembly memory, and implement Rust functions to safely handle raw memory operations. This lesson guides you through integrating JavaScript memory management with Rust code for optimized WebAssembly performance.
We'll cover the following...
Unlike JavaScript, Rust is not dynamically typed. The memory created in JavaScript has no way to tell WebAssembly (or the Rust code) what to allocate and when to free the memory. We need to explicitly inform WebAssembly how to allocate the memory and, most importantly, when and how to free it (to avoid any leaks).
We use the WebAssembly.memory() constructor to create the memory in JavaScript. The memory constructor takes in an object to set the defaults. The object has the following options:
initial: The initial size of the memory.maximum: The maximum size of the memory (optional)....