Sure! Here's a blog draft for Dev.to titled:

Will WebAssembly Replace JavaScript? A Deep Dive 🚀

TL;DR: WebAssembly isn’t here to replace JavaScript — it’s here to empower it. But the way we build web apps is definitely evolving.

🌐 The Web Today: JavaScript Everywhere

WebAssembly is a binary format designed for safe and efficient execution on modern web browsers. Think of it as a virtual CPU for the web.

It’s:

Fast: Runs at near-native speed 🚀
Safe: Sandboxed like JS
Portable: Runs anywhere a browser runs
Language-agnostic: Compile C, C++, Rust, Go, etc., to Wasm

A Simple WebAssembly Example (in Rust)

Let’s write a simple function in Rust and compile it to Wasm:

// src/lib.rs
#[no_mangle]
pub extern fn add(a: i32, b: i32) -> i32 {
    a + b
}

Then compile with:

wasm-pack build --target web

This creates a .wasm binary and JavaScript glue code you can import into your web project.

🔗 JavaScript + Wasm = Power Duo

Here’s the kicker: Wasm doesn’t replace JS — it works with it.

// JS glue code to call Wasm function
import init, { add } from './pkg/my_wasm_module.js';

async function run() {
  await init();
  console.log(add(5, 7)); // 12
}

run();

Use Wasm for performance-heavy tasks (e.g.:

Image/video processing 🖼️
Complex math & simulations 🧮
Game engines 🎮
Cryptography 🔐

... and keep using JS for:

DOM manipulation
Event handling
Business logic

🔥 Where WebAssembly Shines

Speed: Wasm can outperform JS by up to 20x for computation-heavy tasks.
Language reuse: Bring your existing C++, Rust, Go code to the web.
Security: Wasm runs in a safe, sandboxed environment.
Cross-platform: The same Wasm binary can run on browser, server, or embedded systems.

🧩 Limitations (For Now)

🧠 Wasm has no direct access to the DOM — you still need JS as the bridge.
🛠️ Tooling is getting better, but still maturing.
🌍 Ecosystem support for Wasm isn't as rich as JavaScript... yet.