Definitive Guide to Multi-Threaded Rendering on the Web

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The web is still single-threaded, but modern apps aren’t. A practical guide to multithreaded rendering using workers, canvas, and DOM strategies.
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The DOM is single-threaded, but modern web apps demand parallelism. This article breaks down practical multithreaded rendering strategies—Web Workers, SharedArrayBuffer, Offscreen Canvas, server-side DOM creation, and parallel DOM approaches—highlighting where each works, where it fails, and how frontend engineers can combine them to push performance beyond main-thread limits.