DEV Community: Erfan Ebrahimnia

What Actually Triggers Suspense in React?

Erfan Ebrahimnia — Sat, 18 Jul 2026 13:55:19 +0000

React Suspense Docs Update

Aurora Scharff has been working on the React Suspense docs, which now include a full list of what can activate a Suspense boundary, along with live demos for each case. She also shared a thread showing the demos on X

⚡️ Sponsor: Tigris Data

Get the universal API for storage

Snapshot = tag. Fork = branch. Announcing StorageSDK, bringing this Git-like model to storage, making it easier to build reproducible AI-agent workflows in TypeScript.

📙 Articles / Tutorials / News

I let React Compiler handle memoization: Here’s what actually broke

What happens when you let React Compiler take over memoization in a Next.js app? The article shows that you can remove many manual memo hooks, but not always all of them, especially when third-party tools depend on stable function references.

Hidden Cost of Hydration Mismatches

If you’ve ever ignored a hydration mismatch warning, this article is worth reading. It explains in simple terms how mismatches can force React to recreate DOM and make Largest Contentful Paint much worse than it should be

► Async React with Vercel's Aurora Scharff

Aurora Scharff returns to PodRocket to discuss Async React and the React 19 features built around it. She looks at why these patterns matter for real users, how Next.js is improving caching with cache components and the App Router, and why fast-feeling apps matter as much as stable layouts

📦 Projects / Packages / Tools

env.style

If you often work across different Next.js environments, this package makes them easier to recognize at a glance. You can assign colors, add custom icons, and adjust settings so important colors stay untouched

Vinext 1.0 (Beta)

vinext, the project that lets you run Next.js apps on Vite, has reached its first beta release. This update adds a new create-vinext-app starter, improves Cloudflare support with cache warming and prerendered route caching, and now requires Vite 8. There are also several fixes for App Router behavior, config handling, and build performance

shadcn/ui July 2026 - Base UI as the Default

New shadcn/ui projects now use Base UI by default, while Radix remains fully supported. The change comes after strong adoption, with Base UI now stable, widely used, and the default choice in newer shadcn/create projects

shadcn/typeset

A CSS tool for making markdown look good with less work. Instead of styling each element one by one, it styles everything inside a typeset wrapper and lets you adjust the look with three simple variables

⚡️ Sponsor: Expo

How is your app performing in production?

Most teams learn about performance regressions from user complaints. Observe surfaces them within hours of the release that caused it.

🌈 Related

Can't Maintain: A React Component API Game

A collection of learning apps where you compare two options and pick the better one. It covers topics like React, TypeScript, SEO for Next.js, testing, Git, and more, with each app adding its own tools like playgrounds, inspectors, and visual viewer

Reverse Engineering ChatGPT Web: How OpenAI Built for a Billion Users

Yes, it's partly a story about moving away from Next.js, but it's still a very interesting read. It breaks down how ChatGPT's web app is built, from fast server rendering and streaming responses to feature flags, bot checks, and a strong focus on getting users typing as quickly as possible

Vercel and Shopify are rebuilding Hydrogen

Hydrogen is Shopify's framework for creating headless storefronts. Vercel and Shopify have announced a full rebuild to make it more open and easier to use across different frameworks, including Next.js

When React Hooks Stop Scaling: Moving Complex State to Zustand

This is a nice example of an architecture problem showing up as a bug. Oren Farhi explains how a speech recognition hook worked well at first, but became hard to reason about once transcript updates needed to come from outside the component tree

Better Auth Joins Vercel

Erfan Ebrahimnia — Fri, 10 Jul 2026 10:20:54 +0000

📣 A quick note before we get started: I'm moving this newsletter from Kit to a new platform soon. You don't need to do anything, if you want to keep receiving Next.js Weekly. During the switch, I'll also tidy up the mailing list. Anyone who hasn't interacted with the newsletter in the last 3 months will be unsubscribed automatically

Better Auth is joining Vercel

Better Auth, the open source auth framework, is joining Vercel. The goal is to give the team more support to keep building auth in the open while staying framework-agnostic. The post also shares the story behind Better Auth, from solving multi-tenant auth problems in Next.js to later taking over Auth.js / NextAuth.js. Looking ahead, the team wants to invest more in auth for AI agents, where apps need secure and revocable access on behalf of users

From Vercel Ship:

⚡️ Sponsor: Blazity

Next.js migration toolkit that eliminates guesswork and protects production and stability

Most Next.js migrations from Pages Router to App Router follow the same pattern: a developer reads the docs, starts converting files, breaks something in production, then spends weeks firefighting.

The real problem with migrations are the edge cases nobody warns you about, and the lack of systematic approach. We’ve done enough migrations to confidently say - we’ve been there and done that.

So we built Skills.md — an agent-oriented migration toolkit that gives AI coding agents (and developers) a structured, production-safe path from Pages Router to App Router.

Instead of guesswork and broken deploys you get a repeatable process built from real migration experience.
It's open source and built for Skills.sh.

📙 Articles / Tutorials / News

Different hydration and rendering strategies

Covers CSR, SSR, streaming, islands, React Server Components, and more, with the pros and cons of each

RFC: WebSocket Upgrades in Route Handlers

A new draft proposal from the Next.js team wants to bring built-in WebSocket support to App Router Route Handlers

reactperf

40 steps across 11 sections covering the main parts of React performance. This guide explains common slowdowns like extra re-renders, effect problems, large lists, bundle size issues, and layout work, all in a simple order that builds from one topic to the next

📦 Projects / Packages / Tools

AI SDK 7

New features include better reasoning controls, tool and runtime context, file and skill uploads, MCP Apps, a terminal UI, tool approvals, durable workflows, and timeout support

Astryx

Meta has open sourced the design system. It includes 150+ accessible React components, brand-level theming, dark mode, ready-to-ship templates, and a CLI, all without forcing you into a styling setup. It uses StyleX under the hood

react-stinky

If your React components are getting messy, this tool aims to help. It checks for common code smells across a whole component or file, including bad state flow, weak accessibility, hook mistakes, and TypeScript issues

Unlayer Elements

A new open source React component library that lets teams create transactional emails, landing pages, and documents from the same component model

⚡️ Sponsor: Expo

How is your app performing in production?

Most teams learn about performance regressions from user complaints. Observe surfaces them within hours of the release that caused it.

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React Compiler Is A Retrofit

This article argues that React Compiler is useful, but it is still a workaround for React’s long-standing identity and memoization issues

Writing Custom Renderers for React

With React Test Renderer now deprecated, Maciej Jastrzębski explains how and why he built a new test renderer for React Native Testing Library. It’s a useful look at what React renderers actually do, how the reconciler works, and how React turns components into platform-specific UI

Why Drizzle ORM couldn't publish new releases on NPM for a month

Drizzle ORM recently hit a little-known npm limit that blocks publishing once a package’s full metadata file grows beyond 100 MB. The article explains why this happens, how older versions add up over time, and why publishing lots of dev or snapshot builds is usually a bad idea

Next.js 16.3, WebSocket on Vercel, cnfast, Instant Navigations, React Libraries for 2026, What RSCs Can Do

Erfan Ebrahimnia — Thu, 25 Jun 2026 20:59:57 +0000

Next.js 16.3: Instant Navigations

Next.js 16.3 preview introduces "Instant Navigations", a new way to make app navigations feel much faster. There are also new dev tools like Instant Insights, a Navigation Inspector, and a Playwright helper for testing instant page changes

► What RSCs Can Do in Next.js Today

Aurora Scharff shows how Next.js helps you build app-like experiences without needing to fully rely on the usual SPA model. It highlights how React Server Components, streaming, caching, fresh data, and coordinated updates can work together to make apps feel fast while keeping the component model simple as projects grow

⚡️ Sponsor: Arcjet

AI compliance controls

Protect your AI applications from prompt injection, PII leaks, and unauthorized tool calls.

📙 Articles / Tutorials / News

► Next.js 16.3 got good (if you care)

A positive look at where Next.js is heading, based on demos shown at Next.js Night in Amsterdam and London. The big theme is better, more declarative caching, plus new “instant insights” in dev mode that help spot slow parts of your app and suggest fixes

How We Cut Slow Responses by 80% Migrating to Next.js App Router

The team at Subito shares their journey migrating from Pages Router to App Router on a high-traffic site. The trickiest part wasn't Next.js itself, but getting HTML streaming to work through their entire stack (Nginx, CDN). They rolled out category by category, monitored SEO closely, and saw slow responses drop by roughly 80%

React Libraries for 2026

Robin Wieruch updated his popular article on the essential libraries and tools for building React applications in 2026. It covers everything from project setup and state management to databases, hosting, and beyond

Component Communication Patterns in React Applications

How should two React components share data? It depends on their distance and what's being shared. This guide covers every pattern from props and callbacks to Zustand, TanStack Query, URL state, and pub-sub, with clear advice on when to reach for each

📦 Projects / Packages / Tools

cnfast

If you use tailwind-merge with shadcn/ui, this one's worth a look. cnfast is a drop-in replacement that produces byte-identical output but runs 3.8x faster on average (up to 7x in component-heavy code)

Next.js SaaS Boilerplate

This starter kit helps you quickly build SaaS apps with built-in auth, teams, roles, database tools, testing, and deployment support. Recently updated for Next.js 16

eve Chat Template

A persisted Next.js chat template for eve (Vercel's latest framework for building agents), built with shadcn/ui, Tailwind CSS, Streamdown, Better Auth, Drizzle, Neon, and Upstash Redis

stylex/atoms

Added in the latest StyleX release, @stylexjs/atoms makes it easier to write inline atomic styles, similar to Tailwind. It supports both static atoms like x.display.flex and dynamic ones like x.color(color)

Sponsoring the newsletter

A quick note from me: if you’re building something for the Next.js community, consider sponsoring this newsletter and putting it in front of 7,000+ Next.js developers.

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Vercel: WebSocket support is now in Public Beta

Vercel Functions can now handle WebSocket connections, making it easier to build realtime features like chat, AI streaming, and collaborative apps on Vercel. It works with standard Node.js WebSocket libraries like ws, and higher-level tools like Socket.IO are supported too. Pricing follows normal Function usage, and with Active CPU pricing, idle connection time is not billed.

You're Using React Compound Components Wrong

Compound components are a group of components that work together and share state. This post shows why they work best for layout with mostly static, different kinds of children like tabs or cards, and why data-driven lists like <Select> and <Option> are often the wrong use for them

Turbopack: add experimental React compiler support

We recently mentioned the Rust port of the React Compiler, and things have moved fast since then. The Pull Request has now been merged, and support was quickly added to Turbopack too. That means you can now try it in Next.js by enabling experimental.rustReactCompiler

Moving Linear from styled‑components to StyleX

Linear shares how they're moving from runtime CSS-in-JS to StyleX for build-time style extraction and stronger encapsulation

Security in React, React Compiler Rust Port, Server Functions in parallel, Auth book, Vercel Sandbox Docker Support

Erfan Ebrahimnia — Fri, 05 Jun 2026 11:22:16 +0000

Security in React Applications

A thorough guide to securing React apps beyond the built-in protections. Covers how to prevent XSS, sanitize HTML with DOMPurify, store auth tokens safely, validate server-side inputs using Zod with Server Functions, and set up Content Security Policy with nonces for inline scripts

PR: Port React Compiler to Rust

The React team shared an early Rust port of React Compiler not long ago, and it’s already come a long way. It now works across nearly all of Meta’s codebase with the same output as the TS version, while also running faster

⚡️ Sponsor: Tigris Data

Get the universal API for storage

Snapshot = tag. Fork = branch. Announcing StorageSDK, bringing this Git-like model to storage, making it easier to build reproducible AI-agent workflows in TypeScript.

📙 Articles / Tutorials / News

PR: Run Server Functions in parallel

The Next.js team is working on letting Server Functions run in parallel, hidden behind a parallelServerFunctions feature flag. The PR is still a draft, but let's hope this lands soon

► A Guide to React Compiler Rendering

Explains how React rendering actually works and what the new React Compiler is doing under the hood to make your app faster

React Performance: From Sluggish to Lightning

A simple visual guide to what actually makes React apps slow today. Covers state colocation, the React Compiler, useTransition, lazy loading, and a few easy-to-miss performance bugs

𝕏 The problem with React's useEffect

A quick explainer on how useEffect can cause infinite re-render loops and crash your app. The video also teases React Doctor, a tool that automatically detects these kinds of issues and helps you fix them

📦 Projects / Packages / Tools

Auth book

Pilcrow, the creator of Lucia Auth, wrote a free book covering everything you need to know about implementing authentication in web applications

Run Docker containers inside Vercel Sandbox

You can now install and run Docker containers inside Vercel Sandbox. Useful for spinning up services like Redis or Postgres for testing, validating images, or previewing containerized apps

shadcn/ui June 2026 - GitHub Registries

shadcn now lets you turn any public GitHub repository into a registry. Just add a registry.json file to the root of your repo, define your items, and anyone can install them with the shadcn CLI using shadcn add <username>/<repo>/<item>.

Legend List 3.0

A drop-in replacement for FlatList/FlashList that now works on the web too. It handles dynamic sizes automatically, supports chat and AI chat apps out of the box, and uses less CPU and memory than alternatives

⚡️ Sponsor: Expo

How is your app performing in production?

Most teams learn about performance regressions from user complaints. Observe surfaces them within hours of the release that caused it.

🌈 Related

DOM Manipulation That Kills Your 60fps

This study tested common DOM anti-patterns in Chromium and scanned 275 repos to see how often they appear. The clearest result: innerHTML += in a loop is extremely slow and can freeze the UI, while forced layout reads after writes also cause noticeable slowdowns

My Frontend Stack In 2026

A developer walks through the 15 tools they actually use in production. Next.js for content sites, Vite 8 for SPAs, Tailwind + shadcn/ui for styling, TanStack Query for data fetching, Zustand for state, Zod for validation, and more

Migrating from Radix UI to Base UI: Step-by-Step Guide

Covers why Base UI matters, key API differences like the shift from asChild to the render prop, component-specific changes for Accordion, Select, Tooltip and more, plus common pitfalls to watch out for

A Technical Deep Dive Into the New Raycast

Raycast rebuilt their app from scratch to run on both macOS and Windows. They went with a hybrid approach: React and TypeScript for UI in system WebViews, native shells in Swift and C#, Node.js for backend logic, and Rust for performance-critical parts like file indexing

RSC Component Architecture, Next.js Dev MCP, Interactive Apps Guide, React Doctor, Bklit UI, Chat SDK Community Agent, Prefetch App Shells

Erfan Ebrahimnia — Fri, 29 May 2026 06:12:34 +0000

Component Architecture for React Server Components

Traces the evolution from useEffect to React Query to route-level loaders to RSCs, using a social feed app as an example. The main takeaway: let each component fetch its own data on the server and use Suspense boundaries to design the loading experience instead of fetching all data at the top of a route and drilling it down through props

► I Tested Next.js Dev MCP (So You Don't Have To)

The video looks at Next.js DevTools MCP, a tool that helps AI editors understand your Next.js app better. It can read the latest docs, see routes and errors, and give more accurate help when building with newer Next.js features

⚡️ Sponsor: Blazity

Next.js migration toolkit that eliminates guesswork and protects production and stability

Most Next.js migrations from Pages Router to App Router follow the same pattern: a developer reads the docs, starts converting files, breaks something in production, then spends weeks firefighting.

The real problem with migrations are the edge cases nobody warns you about, and the lack of systematic approach. We’ve done enough migrations to confidently say - we’ve been there and done that.

So we built Skills.md — an agent-oriented migration toolkit that gives AI coding agents (and developers) a structured, production-safe path from Pages Router to App Router.

Instead of guesswork and broken deploys you get a repeatable process built from real migration experience.
It's open source and built for Skills.sh.

📙 Articles / Tutorials / News

Docs: add Interactive Apps guide

A new draft PR to the Next.js docs walks you through building snappy, responsive UIs. It covers eight patterns including optimistic updates, streaming with Suspense, drag-and-drop, form handling, and caching for instant navigation

PR: Prefetch App Shells on the client

A new experimental feature that ensures every navigation in a Next.js app shows something instantly even if a per-link prefetch hasn't finished yet

The Flight Protocol Made Your DoS My Problem

This post looks at a React Flight bug that could let a single request slow down or freeze a Node server. It also shows how Server Components quietly turned the component tree into a network protocol, while most teams never updated their threat model to match

Migrating from Express to Next.js with AI agents

Shows how to turn a legacy Express app into a modern Next.js app using Google Antigravity and AI agents. Covers patterns, testing, and how agents fix their own mistakes

📦 Projects / Packages / Tools

React Doctor

React Doctor deterministically scans your codebase and finds issues across state & effects, performance, architecture, security, and accessibility.

sekisho

A library that uses React's error boundary mechanism to handle login redirects and access control in a clean, declarative way. Call needLogin() during render to trigger a redirect, or accessRestricted() to hide UI from unauthorized users. It's like <Suspense> but for auth

Bklit UI

A collection of Open Source charts and utility components that you can customize and extend

Chat SDK Community Agent

Open source AI-powered Slack community management bot with a built-in Next.js admin panel. Uses Chat SDK, AI SDK, and Vercel Workflow.

⚡️ Sponsor: Bluebag

Add Skills to your AI-SDK Agent in minutes

Execute Skills in runtime VMs without building infrastructure. Run complex scripts, read Skills on-demand, install dependencies, mint download links, and build predictable, specialised agents in minutes.

🌈 Related

How's Linear so fast? A technical breakdown

A deep dive into the engineering and design decisions that make Linear feel almost instant

My Thoughts on AI: Agent Setup, Workflow, and Tools

Redux maintainer Mark Erikson shares a detailed look at how he actually uses AI for day-to-day development

React Testing Library Tutorial (with Jest & Vitest)

Robin Wieruch updated his guide to React Testing Library, covering how to test components the way users interact with them

Prisma Next Early Access: Write Your Contract, Prompt Your Agent, Ship Your App

Prisma Next is a new ORM that lets you define your database in one contract file, while it handles migrations, type-safe queries, and errors for you. It is also built to work closely with AI agents, so they can help you build apps faster. Early Access is open now for Postgres and MongoDB, but it is not ready for production yet

Files SDK, React2Shell Story, Next.js Security Release, Fate, Tailwind CSS v4.3, RSC Server Functions

Erfan Ebrahimnia — Fri, 22 May 2026 12:59:51 +0000

Next.js May 2026 security release

A big security update for Next.js fixing 13 issues across auth bypass, denial of service, SSRF, cache poisoning, and XSS. One of the fixes also covers an upstream React Server Components bug. If you use affected Next.js or react-server-dom-* versions, update right away, as patching is the only full fix. Next.js 15.5.18 and 16.2.6 include the fixes

Docs Update: Data Security & Mutations

The Next.js team extended the guides for implementing data security and mutations in your apps, with a big focus on Server Actions and Server Functions. The docs now make it clearer that these functions can be called by direct POST requests, so you should always check authentication and authorization inside each one, not just at the page level

⚡️ Sponsor

Your AI shouldn't grade its own homework

Claude Code writes beautiful code. So does Codex. But here's the thing, they also think they write beautiful code. And when you ask an AI to review code it just wrote, you get the intellectual equivalent of a student grading their own exam. Shockingly, they always pass.

CodeRabbit CLI plugs into Claude Code and Codex as an external reviewer, different AI Agent, different architecture, 40+ static analyzers and zero emotional attachment to the code it's looking at. The agent writes, CodeRabbit reviews, and the agent fixes. Loop until clean.

You show up when there's actually something worth approving.

One command. Autonomous generate-review-iterate cycles. The AI still does the work. It just doesn't get to decide if the work is good anymore.

Free tier available. Try CodeRabbit's CLI.

📙 Articles / Tutorials / News

The React2Shell Story

A security researcher shares how a close look at React Flight led to finding a critical remote code execution bug in React, later fixed as CVE-2025-55182. It’s a great read if you want to learn how React Server Components and Server Functions work under the hood

Next.js Link as a Button

A simple guide to turning a library button into a real Next.js link. It keeps client-side navigation and renders a proper <a> element

RSC Server Functions Are Not An API Boundary

An interesting post on the hidden API-like risks of server functions. The main point: if something needs to stay stable across deploys, it may need a real API instead.

📦 Projects / Packages / Tools

Files SDK

A new SDK that gives you a single way to work with object and blob storage across 18 providers, including S3, R2, Vercel Blob, and Google Drive. You can upload, download, list, delete, copy, and more without changing your app code when you switch providers

fate

This new data-fetching library takes some of Relay’s best ideas, like view composition and strict data selection, and brings them to regular TypeScript apps. It also supports Suspense, optimistic updates, and live views

Tailwind CSS v4.3

Highlights include new scrollbar utilities, four new color palettes, and a first-party webpack plugin with a big speed boost for Next.js apps

Base UI v1.5.0

This release is mainly about speed and bug fixes. Popups now mount and unmount much faster, and many components got fixes for forms, focus, RTL, and browser behavior

⚡️ Sponsor: Bluebag

Add Skills to your AI-SDK Agent in minutes

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React Folder Structure Best Practices

Robin Wieruch has updated his long-running guide for 2026 with a step-by-step look at how to organize React apps as they grow

Accessibility in React: Common Mistakes and How to Fix Them

Covers common React accessibility mistakes such as bad semantics, broken focus, and hidden updates, with clear tips on how to improve them

Five Models, One React Stack: Why Every LLM Builds the Same App

An interesting post on how AI models have started to favor the same tools for building React apps

From latency to instant: Modernizing GitHub Issues navigation performance

A behind-the-scenes look at how GitHub sped up Issues navigation through a combination of client-side caching, prefetching, and a service worker

deepsec, vercel-openclaw, Next.js Security Releases, Adapters API, portless, shadcn/ui, Vercel Weekly

Erfan Ebrahimnia — Fri, 08 May 2026 06:51:50 +0000

Introducing deepsec: The security harness for finding vulnerabilities in your codebase

A new open source tool from Vercel that uses AI coding agents to find security vulnerabilities in your codebase. It runs locally on your laptop or on your own infrastructure using your existing AI subscriptions. The workflow involves static analysis to find security-sensitive files, agent investigation of each candidate, and includes a revalidation step to reduce false positives

𝕏 Next.js 16.2.6 & 15.5.18 Security Releases

Important security updates have landed for both Next.js 16 and 15. These patches fix multiple vulnerabilities ranging from low to high severity

⚡️ Sponsor

Your AI shouldn't grade its own homework

You show up when there's actually something worth approving.

One command. Autonomous generate-review-iterate cycles. The AI still does the work. It just doesn't get to decide if the work is good anymore.

Free tier available. Try CodeRabbit's CLI.

📙 Articles / Tutorials / News

🎧 Next.js works everywhere now

Jimmy Lai, who leads the Next.js team at Vercel, hops on the PodRocket podcast to explain the adapters API: what it is, why it exists, and how it fixes the pain of self-hosting Next.js on platforms like Cloudflare, AWS Amplify, and Netlify

Async React: Building Non-Blocking UIs with useTransition and useActionState

A practical guide to two React 19 hooks that make async work easier. useTransition keeps your UI responsive without manual loading states, while useActionState bundles state, errors, and pending status into one hook

► Stop Writing Blind Server Components

We've shared this tool before, and now Tobi Mey walks through it on video. RSC Boundary shows you exactly where server components end and client components begin in your Next.js app

📦 Projects / Packages / Tools

vercel-openclaw

A serverless approach to running OpenClaw. It comes with CLI deployment, sandbox snapshots that preserve state between messages, webhooks routed through Vercel Functions, a Redis-based control plane, and an egress firewall for domain blocking

portless v0.12.0

Portless got some awesome improvements since the last time it was featured. The big one: zero-arg mode auto-discovers your dev script so there's nothing to configure. It also now handles monorepos, giving each workspace package its own subdomain. v0.12 adds --tailscale and --funnel flags to share your local apps over Tailscale

The Agent Harness Framework

A framework that lets you build powerful AI agents (think Claude Code or Codex) in just a few lines of TypeScript. It gives you sandboxed shell access, sessions, reusable skills, and structured outputs

shadcn/ui: May 2026 updates

The shadcn CLI now lets you use package.json#imports (e.g. #components/*) instead of relying on tsconfig.json paths. It also adds target aliases so registry items can specify exactly where files get installed

⚡️ Sponsor: Bluebag

Add Skills to your AI-SDK Agent in minutes

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𝕏 Vercel Weekly - May 4, 2026

Vercel's AI Accelerator cohort finished with a Demo Day in SF. Meanwhile, Grok 4.3 landed on the AI Gateway, Stripe Projects now handle Pro plan upgrades, hobby deployments are kept for 30 days by default, and Deployment Checks are now built in

New to the web platform in April

A look at what landed in browsers last month. Highlights include contrast-color() reaching Baseline (picks black or white for best text contrast), ariaNotify() for screen reader announcements in Firefox, element-scoped view transitions in Chrome, and Math.sumPrecise

Why TSRX isn't just your Favorite Templating Language

Ryan Carniato digs into TSRX, a potential JSX successor, and explains why it matters: it uses plain JS control flow, allows state inside conditionals and loops (no hook rules), and offers cut-and-paste composability that JSX can't match

Server-Driven UI in 22 lines of TypeScript

A practical guide to letting your backend control page layouts through JSON. The article covers the JSON contract, a component registry, a tiny recursive renderer, and handling actions like navigation and tracking

How React streams UI, React Compiler Rendering, dev3000 CLI, TSRX, Replay, Scroll-Driven Animations, Ship 26 tickets

Erfan Ebrahimnia — Fri, 01 May 2026 11:42:53 +0000

How React streams UI out of order and still manages to keep order

Instead of waiting for every component to be ready, React streams what it can and leaves markers for the rest. When slow components finish, they arrive as hidden divs and get swapped into place by small scripts. This post walks through the full mechanism step by step

Ship 26 tickets just dropped

Vercel's Ship conference is heading to London, Berlin, New York, Sydney, and San Francisco. Talks and workshops focused on shipping AI agents and apps to production

⚡️ Sponsor: Blazity

Next.js migration toolkit that eliminates guesswork and protects production and stability

Most Next.js migrations from Pages Router to App Router follow the same pattern: a developer reads the docs, starts converting files, breaks something in production, then spends weeks firefighting.

The real problem with migrations are the edge cases nobody warns you about, and the lack of systematic approach. We’ve done enough migrations to confidently say - we’ve been there and done that.

So we built Skills.md — an agent-oriented migration toolkit that gives AI coding agents (and developers) a structured, production-safe path from Pages Router to App Router.

Instead of guesswork and broken deploys you get a repeatable process built from real migration experience.
It's open source and built for Skills.sh.

📙 Articles / Tutorials / News

A Guide to React Compiler Rendering

Slides from Mark Erikson's React Miami 2026 talk covering how React rendering works and how the React Compiler automatically optimizes it

React Client and Server State

This guide shows how to split your state into two buckets: server state (API data) handled by TanStack Query, and client state (UI flags, themes) handled by Zustand or plain React hooks

Hacking in request body during render in Next.js

Robert Webb explored the Next.js codebase to answer the question of why you can't read the request body during render like you can with headers. He managed to hack it in by modifying how NodeNextRequest and workUnitStore work, and accidentally found a bug with cacheComponents and POST requests along the way

𝕏 Light and dark mode favicon in Next.js

A handy code snippet showing how to serve different favicons depending on whether a user is in light or dark mode

📦 Projects / Packages / Tools

d3k (dev3000)

A CLI tool that records your entire dev session: server logs, browser console messages, network requests, screenshots, and user interactions into a unified, timestamped feed that AI assistants can read and reason about

TSRX

A language extension that picks up where JSX left off. Control flow, scoped styles, and local variables sit right inside your templates

Preventing Flash Before Hydration

A demo repo showing how to avoid the flash of content that happens before React hydration kicks in. It covers patterns like using inline scripts for date formatting without hydration errors, persisting accordion state with localStorage, and a handy InlineScript helper that sidesteps React's script warning

Replay

Upload a conversation from Claude Code or Codex and get a clean, shareable link. Your session becomes a readable thread with inline diffs and tool calls

⚡️ Sponsor: Bluebag

Add Skills to your AI-SDK Agent in minutes

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The React Compiler at Eighteen Months: The Arc, the Debates, and What's Next

A retrospective on the React Compiler's journey since React 19. It handles memoization so you don't have to, but the migration story for existing apps is still messy. The piece also looks ahead at compiler-aware Server Components, useEvent, and better dev tooling

Scroll-Driven Animations

The CSS animation-timeline API maps keyframe animations to scroll progress, and this beginner-friendly guide covers everything from basic setup to advanced linked timelines

3 ways to store variables in React, and why you shouldn't sleep on useRef

Most devs know useRef for DOM access, but it's also great for storing data that should survive re-renders without touching the UI. This post walks through all three ways to store variables in React: plain variables, state, and refs with clear examples showing how each behaves

Backend for Frontend (BFF): What It Is and When to Use It

Instead of one generic API for all clients, a BFF gives each frontend its own small backend that fetches, combines, and shapes data from multiple services. This guide covers when it's worth it, when it's not, and common mistakes to avoid

React Email 6.0, Vercel got hacked, Prevent flash before hydration, Logging in Next.js, shader-lab, TypeScript 7.0, nextmap

Erfan Ebrahimnia — Fri, 24 Apr 2026 11:20:30 +0000

React Email 6.0

The highlight of this release is an open-source email editor that outputs inbox-ready HTML. It has a composable API for building custom blocks like image uploaders or social embeds. Also new: a unified single package for all components and a fresh set of templates for auth and e-commerce flows

Vercel April 2026 security incident

Vercel disclosed a security incident where an attacker compromised a third-party AI tool (Context.ai) used by an employee, gaining access to some internal systems and non-sensitive environment variables. No npm packages were affected. Vercel recommends rotating credentials, enabling 2FA, and reviewing activity logs

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Clerk CLI: manage auth from your terminal

The new Clerk CLI detects your framework and gets auth ready to configure. Run clerk init to scaffold, clerk config to manage sign-in methods, redirects, and session policies in code, or clerk api to query users and orgs. Try it.

📙 Articles / Tutorials / News

New Docs: How to prevent flash before hydration

New docs explaining how to avoid the visible flicker when things like dates, themes, or localStorage values differ between server and client

If You Can't See the Boundary, You Can't Reason About the System

We featured the RSC Boundary package in a previous issue. This article from its creator explains the problem it solves: When working with React Server Components, you often have to guess where the server/client split is by reading 'use client' directives and tracing imports. RSC Boundary removes that guesswork. It's a dev-only overlay that highlights which parts of your page are server-rendered and which are client components, giving you a live visual map

Next.js 16 Migration Guide: Everything That Breaks (And How to Fix It)

A thorough, hands-on migration guide covering every breaking change in Next.js 16 and how to deal with it

Logging in Next.js with LogLayer

Next.js logs can get messy across different runtimes. This post shows how to fix that with one shared logger using LogLayer, console interception in instrumentation.ts, and structured output with Pino for production

📦 Projects / Packages / Tools

@basementstudio/shader-lab

A visual tool and React runtime for creating layered shader compositions. Render directly in your app, use them as Three.js textures, or apply built-in effects like ASCII, CRT, dithering, and pixel sorting as postprocessing over your own 3D scenes. Fully open source

nextmap

A CLI tool that scans your Next.js project and shows every route as an interactive graph in your browser. It picks up pages, API routes, middleware, and HTTP methods

Animata

Handcrafted interaction animations and visual effects built with Tailwind CSS and Framer Motion. Works like shadcn/ui

Announcing TypeScript 7.0 Beta

The first beta release of TypeScript 7.0 is here, and it's a big deal. The compiler has been completely rewritten in Go, making it around 10x faster than TypeScript 6.0. It now supports parallel type-checking and parallel project builds out of the box. Despite being a beta, the team says it's stable enough for everyday use

⚡️ Sponsor: Expo

How to go from Web to Native with React

Everything that web devs need to know about building their first mobile app - You already know React. With Expo, you can use that knowledge to build fully native apps for iOS and Android without starting over or learning new tools

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Building a UI Without Breakpoints

Modern interfaces are component-first, but most responsive CSS is still viewport-first. This article bridges that gap with four methods: intrinsic layouts using auto-fit and minmax(), fluid scaling with clamp(), container units for sizing relative to a component's actual space, and container queries for true structural changes

10 React tips I wish someone had told me before I mass-produced bugs

Lessons learned from production bugs and code reviews. Includes tips like replacing multiple useState calls with useReducer, keeping state close to where it's used, using key to reset components, and choosing Compound Components over prop-heavy APIs

A TypeScript Class-Based WebSocket Library for React

Explaining a different approach to WebSockets in React. Instead of putting everything in hooks, the heavy lifting lives in TypeScript classes

AI-Generated UI Is Inaccessible by Default

Breaks down exactly why LLMs produce inaccessible code and presents a practical five-layer fix: prompt constraints, static analysis with eslint-plugin-jsx-a11y, runtime testing with axe-core, CI enforcement via GitHub Actions, and using accessible component libraries like Headless UI, Radix, or React Aria

Instant Navigations, Bye Vendor Lock-in, Ultracite, Blocking Bots, Distributed 'use cache', varlock, Vertical Codebase

Erfan Ebrahimnia — Thu, 16 Apr 2026 18:55:43 +0000

🔥 Hot

Next.js Canary: Ensuring Instant Navigations

A new guide covering how to get instant client-side navigations by putting <Suspense> boundaries and use cache in the right spots. The new unstable_instant export checks your caching structure automatically, and new DevTools let you preview exactly what users see before dynamic content streams in. The feature set is currently only available in the canary branch

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📙 Articles / Tutorials / News

► Next.js Vendor Lock-in No More

The Syntax podcast sits down with Tim Neutkens and Jimmi Lai from the Next.js team to talk about the newly stable Adapters API, which lets you host Next.js on platforms like Cloudflare and Netlify without hacky workarounds. They also cover how Next.js caching works across layers, why they built Turbopack in Rust instead of using Vite, and what's new in Next.js 16.2

𝕏 Blocking WordPress Bot Scanners on Vercel to Save Costs

Random bots scan your site for WordPress files that don't exist in Next.js. They still trigger serverless functions and cost you money. A single regex rule in Vercel's Firewall stops them before they reach your app

Next.js use cache: remote: A Distributed Cache in One Line

Next.js 16 lets you add 'use cache: remote' to any async function to get a shared cache across all serverless instances. No Redis or extra setup needed. The article covers tag-based invalidation, time-based expiration, and smart cache key design.

Docs: Add Building guide

A new draft PR adds a "Building" guide to the Next.js docs. It explains what next build does, how to read build output symbols, pre-render dynamic routes, and fix common prerender errors

📦 Projects / Packages / Tools

varlock

Varlock is an open-source, schema-first approach to environment variable management. The latest update brings single-file ESM and TypeScript plugin support, a new varlock typegen command for environment-independent type generation, and handy new functions like ifs() for Excel-style conditionals. The Next.js integration also got a major update, adding full Turbopack support for both Next.js 15 and 16 alongside the existing webpack support

BetterAuth 1.6

This bridge release focuses less on flashy new features and more on making the project more solid. That said, there's plenty to note: the core package size was cut in half, password hashing is now non-blocking, OpenTelemetry tracing for auth API calls and database operations, plus passkey registration before a user even has a session

Ultracite

A production-ready preset that works with ESLint, Biome, and Oxlint so you don't have to worry about configuration. It comes with hundreds of preconfigured rules, supports monorepos, and can even generate linting rules for 40+ AI coding agents like Claude Code, Cursor, and GitHub Copilot

Base UI v1.4.0

There's a new OTP Field component, fixes for tricky edge cases in Combobox, Select, Toast, and Drawer, and general improvements to accessibility, scroll handling, and keyboard navigation

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The uphill climb of making diff lines performant

GitHub's engineering team explains how they made the pull request "Files changed" tab faster by simplifying their React code

React: Singletons aren't as evil as you think

Singletons have a bad reputation in React, but this post argues they can be clean and powerful

The Vertical Codebase

TkDodo makes a strong case against the common components/hooks/utils folder structure. Instead, group code by what it does, not what it is. He shares real examples from the Sentry codebase and tips on enforcing boundaries between modules

The Blueprint of a North Korean Attack on Open-Source

A technical walkthrough of a supply chain attack attempt on Better-Auth. Malicious code was disguised inside build configs like next.config.mjs, designed to silently steal credentials and open a backdoor. The payloads were hosted on blockchains, making them permanent and nearly impossible to remove

CVE-2026-23869, The Precompute Pattern, Boneyard, use cache migration, RSC Boundary

Erfan Ebrahimnia — Fri, 10 Apr 2026 11:04:51 +0000

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The Precompute Pattern: Encoding Dynamic Data into URLs in Next.js

The Precompute pattern solves the problem of a single cookies() or headers() call forcing your entire app into dynamic rendering. Instead of reading dynamic data inside components, you resolve it once in middleware and encode it into a hidden URL segment. This lets Next.js treat each variant as a static page. The post walks through a full implementation, covers how the Vercel Flags SDK formalizes this approach, and explains why 'use cache' in Next.js 16 makes it unnecessary for most cases

React2DoS (CVE-2026-23869): When the Flight Protocol Crashes at Takeoff

Security researchers at Imperva found a way to crash React servers with tiny requests. The bug (CVE-2026-23869) lives in the Flight protocol, which RSC uses to pass data between client and server. Also check out the Vercel summary of this vulnerability and update to the latest Next.js version

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📙 Articles / Tutorials / News

React Rendering Strategies

A detailed guide that walks you through the full history of React rendering. It covers SPAs, SSR, SSG, and React Server Components with interactive diagrams and real-world examples

feat(next): add sitemap index support

A draft PR has been opened to add native sitemap-index.{ts|js|xml} file support to Next.js. This feature would let you dynamically generate a sitemap index following the Sitemap Index protocol, making it much easier to manage large sites with many sitemaps

Docs: add unstable_cache → use cache migration guide

The Next.js docs will soon include a guide that maps the old unstable_cache patterns to the new use cache API, showing how revalidate: 3600 becomes cacheLife('hours'), tags: ['x'] becomes cacheTag('x'), and explains that keyParts are no longer needed

‘use client’ in Next.js: What It Does, What It Costs, and When to Use It

Every use client you add comes with a price tag. This article breaks down exactly what that cost looks like: more JavaScript sent to the browser, extra hydration work blocking the main thread, and potential data-fetching waterfalls

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The world’s biggest React conference in beautiful Amsterdam and online! Learn from top React experts & connect with the community.

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📦 Projects / Packages / Tools

Boneyard

Boneyard snapshots your real UI and creates a flat list of positioned, sized rectangles that mirror your layout exactly. Just wrap your component in <Skeleton> and you get pixel-perfect skeleton screens that stay in sync with your actual design

RSC Boundary

A simple devtool that draws colored outlines around your components so you can instantly see which parts are server-rendered and which are client-side

use-form-guard

Since Next.js App Router dropped router.events, blocking navigation for unsaved forms has been a pain point. This lightweight hook (~0.8KB, no dependencies) solves it by intercepting tab close, SPA navigation, and browser back/forward

next-translate

A minimal translation library for Next.js that automatically loads only the namespaces each page needs in the current language

🌈 Related

What To Know in JavaScript (2026 Edition)

Chris Coyier's yearly roundup covering everything a JavaScript developer should have on their radar. From new ES2025 features like iterator helpers and set methods, to the Temporal API, to TypeScript v6 preparing for a massive v7 finally fixing dates

You really, really, really don't need an effect! I swear!

A practical guide to eliminating unnecessary useEffect calls in React. The post provides a clear decision tree: computed values should be derived inline, user actions belong in event handlers, state resets should use the key prop, and data fetching should use a library like TanStack Query

Test IDs are an a11y smell

If you're still reaching for data-testid in your tests, this post might change your mind. The author argues that role-based selectors (like getByRole('button', { name: 'Open Widget' })) are far better because they mirror how real users interact with your app and they double as basic accessibility checks

Why we rolled our own React Server Components framework

A team's journey of ditching Gatsby and building their own React Server Components framework in under 1,000 lines of code with React 19 and Vite's new RSC plugin

Turborepo 2.9, React Fiber explained, jal-co/ui, Next.js Mental Model, useOffline, Debug React with AI

Erfan Ebrahimnia — Fri, 03 Apr 2026 11:01:20 +0000

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How Does React Fiber Render Your UI

A single setState call kicks off a surprisingly sophisticated process. This detailed explainer covers how React Fiber organizes your component tree as a linked list, schedules work based on priority lanes, skips unchanged subtrees for efficiency, and batches DOM updates in a single commit phase

Implementing Next.js 16 'use cache' with next-intl Internationalization

This post got featured before, and it's now been updated with the proper solution. The original post covered a workaround for the incompatibility between 'use cache' and next-intl. With Next.js 16.2's new next/root-params API, the workaround is no longer needed

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📦 Projects / Packages / Tools

Turborepo 2.9

A quality-focused release for the popular monorepo build tool, bringing big performance gains and smoother adoption for large codebases:

Up to 96% faster startup: Time before your first task runs has been drastically reduced
turbo query is stable: Query your monorepo's structure with GraphQL or simple shorthands
Circular dependencies no longer block you: Adopt Turborepo incrementally in repos with package cycles
OpenTelemetry (Experimental): Send build metrics to tools like Grafana or Datadog
Structured logging (Experimental): Get machine-readable JSON output for CI and tooling
Future Flags: Start preparing for 3.0 today with gradual migration paths

json-render

Let AI generate UIs from prompts using only the components you define. Output is always predictable and schema-safe. The new @json-render/next package can generate full Next.js apps with routes, layouts, and SSR from a single JSON spec

bippy

Bypasses React's closed internals by hooking into the same mechanism React DevTools uses. Lets you traverse the fiber tree, inspect component props, state, and contexts, and even override them

jal-co/ui

A collection of polished, ready-to-use components you can install via the shadcn registry or copy straight into your project. Zero dependencies where possible and server-first

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🦋 A Better Way to Debug React with AI

Dan Abramov shares a step-by-step workflow for using AI to fix tricky bugs: reproduce it, read the code, add logs, and only then ask the AI to find the issue

Axios Supply Chain Attack Pushes Cross-Platform RAT via Compromised npm Account

Axios, the popular HTTP client, fell victim to a supply chain attack. An attacker compromised the maintainer's npm account and published two rogue versions (1.14.1 and 0.30.4) containing a hidden dependency that installs a remote access trojan across Windows, macOS, and Linux

I finally understand React hydration and why it exists

In this Reddit post a developer shares the journey of how he finally understood why React needs hydration after years of confusion

Why Node.js needs a virtual file system

Matteo Collina introduces node:vfs, a new Node.js core module that lets you create in-memory filesystems that work with import, require(), and standard fs calls