WebAssembly (Wasm)
WebAssembly (Wasm) is a binary format that lets you run code written in languages like C++, Rust, or Go directly in the browser at near-native speed. It's how Figma runs a full design tool in your browser without feeling slow, and how video editors work without installing software.
Definition
A binary format that lets you run code written in languages like C++, Rust, or Go directly in the browser at near-native speed. It's how Figma runs a full design tool in your browser without feeling slow, and how video editors work without installing software.
Related Terms
More Web Development Terms
SSR - Server Side Rendering
The server builds the full HTML page before sending it to the browser. Great for SEO and fast initial loads because users see content immediately instead of a blank screen.
CSR - Client Side Rendering
The browser downloads a minimal HTML shell, then JavaScript builds the page. Fast subsequent navigations, but users might see a loading spinner on first visit.
Hydration
When server-rendered HTML gets "activated" by JavaScript in the browser. The page looks ready instantly, then becomes interactive once the JS loads and attaches event listeners.
SPA - Single Page Application
A web app that loads once and never does a full page refresh. Navigation feels instant because it just swaps content instead of requesting new HTML from the server.
MPA - Multi Page Application
The traditional web model where each page is a separate HTML document. Click a link, server sends a new page. Simple, reliable, and SEO-friendly out of the box.