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What is WebAssembly (Wasm)?

A binary instruction format that enables near-native performance execution of code in web browsers alongside JavaScript.

WebAssembly runs compiled code (from C, C++, Rust, Go) in browsers at near-native speed. Unlike JavaScript, Wasm is a low-level binary format that browsers execute efficiently. It complements JavaScript rather than replacing it.

Use cases include gaming engines, image/video processing, CAD applications, scientific simulations, and running existing C/C++ libraries in browsers. WASI extends Wasm beyond browsers to server-side and edge computing.

Related Terms

DOM (Document Object Model)
A programming interface for HTML documents that represents the page structure as a tree of objects that can be manipulated with JavaScript.
CORS Headers
HTTP headers that control cross-origin resource sharing between different domains, specifying allowed origins, methods, and headers.
SPA (Single Page Application)
A web application that loads a single HTML page and dynamically updates content without full page reloads.
Responsive Design
A web design approach that makes web pages render well on all screen sizes using flexible layouts and media queries.
Progressive Web App (PWA)
A web application that uses modern web capabilities to deliver app-like experiences with offline support and push notifications.
Canonical URL
An HTML element that tells search engines which URL is the preferred version of a page when duplicate or similar content exists at multiple URLs.
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