Next.js & React in Production

Start here Jun 18, 2026 3 min read

Next.js Environment Variable Undefined in Production? Here's Why

Oct 13, 2026 10 min read

Next.js Data Cache Keeps Serving a Stale 200 While the Upstream API Returns 401: a Week-Old Price Labelled 'Updated 2m ago'

Oct 12, 2026 9 min read

Build Fails With next/font/google queries have exactly one entry? When Re-runs Stop Helping, Move the Fonts Into the Repo

Oct 11, 2026 10 min read

cat.trim is not a function From ?cat=a&cat=b? Next.js searchParams Holds an Array, Not a String

Oct 9, 2026 11 min read

Server Disk at 87% and .next/cache/fetch-cache Already 5.1 GB? Next.js 16.3.6 Never Deletes Fetch Entries

Oct 9, 2026 12 min read

Payload Dev Server Hangs on Every Request After a Schema Change: Drizzle Push Waits on a Rename Prompt Nobody Sees

Oct 8, 2026 11 min read

New Token in .env but the Next.js Build Still Uses the Revoked One? A Leftover .env.local on the Server Wins

Oct 7, 2026 10 min read

opengraph-image Returns 500 on Next.js 16: Unawaited params, Then Satori Rejects Two Text Nodes

Oct 7, 2026 9 min read

Private Tier Data Still in Every Page's RSC Payload? A 'use client' Menu Received Whole Payload CMS Documents

Oct 6, 2026 12 min read

Every Page no-store and x-vercel-cache: MISS? A Header That Reads the Session Forces Next.js to Render per Request

Oct 5, 2026 9 min read

Astro Kept 19 MB of Original Images in _astro With No Trace in the Build Log? One .width Read on a Glob Module

Oct 5, 2026 9 min read

draftMode() Is Still Enabled Inside Next.js after(): A Per-Process Cache Can Serve a Draft Title to the Public

Oct 5, 2026 12 min read

vercel env pull Writes [SENSITIVE], Not the Secret Value: That Text Became a Dashboard Password and a Tenant Slug

Oct 4, 2026 11 min read

"It looks like you've run Payload in dev mode" in a Vercel Build: The dev Row at Batch -1 That Turns payload migrate Into a No-Op

Oct 2, 2026 10 min read

Cannot use import statement outside a module From GSAP on Vercel: Astro On-Demand Page 500s While the Build Is Green

Oct 2, 2026 8 min read

CRLF will be replaced by LF While Moving Repos? 189 Working Tree Files Differed from Production. Copy the Git Blob

Sep 30, 2026 9 min read

Astro client:idle Still Renders on the Server? Next's ssr: false Equivalent Is client:only

Sep 30, 2026 10 min read

ngrok Tunnel Returns 200 text/plain Instead of JSON? The ngrok-skip-browser-warning Header Fails the CORS Preflight

Sep 29, 2026 8 min read

libatomic.so.1: cannot open shared object file on pnpm -v: Pinning packageManager to pnpm 11 Froze Deploys

Sep 28, 2026 11 min read

Astro Middleware Headers Show Up in Dev but Never Reach Prerendered Pages on Vercel

Sep 25, 2026 10 min read

-- in MDX Turns Into an Em Dash After Moving to Astro? smartypants Is On by Default, and Only false Turns It Off

Sep 25, 2026 8 min read

git log main..develop Still Lists 10 Commits Whose Content Is Already on Main? --squash Records Only One Parent

Sep 24, 2026 6 min read

ERR_PNPM_IGNORED_BUILDS Stopped Deploys With No Commit Behind It: pnpm 11 Only Reads allowBuilds

Aug 29, 2026 6 min read

Muddy Double Image at the Seam Between Two Pinned Sections? Dissolve Through One Base Color, Do Not Stack Two Scenes

Aug 29, 2026 4 min read

Edited default-menu.ts, Shipped It, and Staging Still Points at the Old Route: a Sanity Singleton Shadows the Code Default

Aug 18, 2026 6 min read

Sanity Webhook Fires but Per-Slug Pages Stay Stale? An Empty Projection Turns It Into revalidatePath('/glossary/[object Object]')

Aug 15, 2026 6 min read

Ticker Says $77k, Table Says $76k: Two Days Chasing a Bug That Was Just a Different Cache Key

Aug 9, 2026 6 min read

react-hooks/set-state-in-effect? 27 React Compiler Lint Errors in Next 16 and Which Ones Deserve a Disable

Aug 4, 2026 6 min read

?email=name@domain.com in the URL Bar: A Newsletter Form That Shipped Without a Handler

Aug 3, 2026 5 min read

A Page Is 200 in curl but the Browser Says couldn't load? RSC Stream 500 From revalidateTag During Render and an Exhausted Upstash Quota

Aug 3, 2026 5 min read

1 Million Sanity CDN Requests Gone Before the Month Ended? force-dynamic Turns Every Child Fetch Into no-store

Aug 3, 2026 5 min read

Still Burning 150k Sanity Requests a Day After the Cache Fix? 85% of It Was 4 layout Singletons

Aug 3, 2026 4 min read

Module not found: Can't resolve '@sanity/ui'? A Silent Turbopack Build Failure and a Deploy That Never Landed

Jul 31, 2026 4 min read

Route Only 500s in Production, pnpm dev Is Fine? DYNAMIC_SERVER_USAGE From an Empty generateStaticParams That Reads searchParams

Jul 20, 2026 4 min read

1.7 Million API Calls a Month With Zero Visitors: a 15-Second TTL Times Cache Fragmentation Times Bot Crawl

Jul 18, 2026 4 min read

Fear & Greed Index Stuck at 72 While the API Says 26: a Hardcoded Placeholder Hiding an Outage

Jul 15, 2026 5 min read

Cmd+K Search Returns "No matches" for Almost Every Keyword in Prod? The Index Was Built From Placeholders

Jul 14, 2026 4 min read

Sanity Panel 500s in Prod, API Returns 400 score() function received unexpected expression? boost() Only Takes Simple Predicates

Jul 14, 2026 4 min read

Article Page Is 200 in pnpm dev but 500 in Production? DYNAMIC_SERVER_USAGE From a Nested Server-Component Fetch

Jul 14, 2026 4 min read

Production Serving Stale HTML After a Deploy? A Cannot read properties of undefined (reading 'toFixed') Was Crashing SSR

Jul 13, 2026 4 min read

next dev Is Green but next build Fails Type-Check: Dynamic Element With ref and children Typed never

Jul 13, 2026 4 min read

Next.js 16 Works on localhost but HMR Dies Over a LAN IP? Add allowedDevOrigins

Jul 13, 2026 5 min read

next dev Turbopack Crashes With invariant expected layout router to be mounted on One Machine Only? A node_modules Junction Is the Culprit

Jun 30, 2026 6 min read

Every Article Page Rendered not-found, and the Real Cause Was a Month-End CMS Quota

Jun 28, 2026 5 min read

CSS Modules Rejects a Data-Attribute Selector: selector is not pure

Jun 28, 2026 4 min read

Background Music Dies Every Time an Anchor Link Is Clicked? window.location.href Is a Full Reload

Jun 21, 2026 5 min read

A Countdown Widget Hitting a Third-Party API Straight From the Browser Every 60 Seconds: One 8-Hour Tab Equals 480 Calls