Blogs

Learn how to build a streaming chat UI in React that follows the answer only while the user is at the bottom, never yanks them back when they scroll up, and tells screen reader users what is happening without reading every token aloud, using useChat from the Vercel AI SDK.

Learn how to build a Node.js SSE endpoint for LLM output that stops the model call when the user leaves, respects backpressure, times out stalled streams and reports errors after the 200 has already been sent, using the Vercel AI SDK.

Learn what a token really is, why every chat turn resends the whole conversation, how the context window caps input plus output, and how to measure and control LLM cost in TypeScript with the Vercel AI SDK.

A step-by-step model of how the browser event loop picks tasks, drains microtasks, and decides when to paint, so you can predict execution order exactly and fix long-task jank with scheduler.yield().

Learn how Chrome ships a language model inside the browser, how the Summarizer and Prompt APIs manage model download, sessions, streaming and structured output, and how to build a feature that degrades safely when the model is missing.

TC39 finalized the Temporal API for ECMAScript 2026 and it now ships natively in Chrome, Firefox, and Node.js 26. Here is exactly what was broken about Date, what Temporal fixes, and how to migrate real code.

Four non-obvious TypeScript patterns, the satisfies operator, branded types, exhaustive union checking, and template literal route types, that catch real bugs at compile time instead of in production.

A deep look at the property-level conflict resolution, tree synchronization, and fractional indexing that let Figma ship real-time multiplayer editing years before anyone else did.

A first-principles walkthrough of the eight-stage pipeline Chrome uses to turn a DOM mutation into pixels, and why that split between main thread and compositor thread decides whether your animation runs at 60fps or drops frames.

How LLM responses actually travel from server to browser as streamed chunks, and how to render them in React without janky re-renders, broken markdown, or memory leaks.

The Navigation API, CSS Anchor Positioning, and Trusted Types all reached Baseline in 2026. Here is exactly how each one works under the hood, with runnable code, so you can use them in production and speak to them confidently in interviews.

A practical walkthrough of six techniques, from Chrome DevTools heap snapshots to AbortSignal.any() and content-visibility, that working frontend engineers use to debug memory leaks, cancel async work cleanly, and ship faster UIs.

A deep look at how Linear built a sync engine that makes every interaction feel instant and keeps working offline, covering its object model, transaction queue, sync ids, and delta packets.

A precise walkthrough of what happens between calling setState and pixels changing on screen, covering Fiber nodes, the render and commit phases, priority lanes, and why React can pause mid-render.

Frontend engineering is undergoing a fundamental shift. This article breaks down how TypeScript, AI, and Server Components are redefining modern web architecture with practical insights and real-world patterns.