One Line in My Root Layout Turned 158 Static Pages Into 0
Reading a cookie with cookies() in the Next.js root layout opts every route out of static rendering. What it cost this blog, measured, and how to fix a theme flash without it.
7 min read2
Understand JavaScript, React & Next.js — one short post at a time.
Practical, diagram-first explanations you can read over coffee. 48 posts and counting.
Newest
You Selected Rows 3, 8, 12, 15 and 20. JavaScript Checked 3, 1 and 8.
Why ['1', '7', '11'].map(parseInt) returns [1, NaN, 3]: map passes the index as parseInt's radix. Plus the Number('') trap hiding in the obvious fix.
4 min read2
Latest
All 48 posts →The Leaderboard That Ranked 9 Points Above 100
Why JavaScript's sort() compares numbers as strings, why a 'lazy' comparator works in Safari but breaks in Chrome, and the one-line fix.
5 min read3
I Optimized a Button From O(n) to O(1). The Speed Didn't Matter.
A bug report, a route map, and three rounds of making it faster — a story about what Big O really measures, why constants win at small n, and why the best algorithm is sometimes deleting the question.
10 min read5
CORS Explained Simply — Why Your Fetch Works in Postman but Fails in the Browser
Cross-Origin Resource Sharing in plain language: what blocks your request, what preflight means, and how to fix the errors you'll see in every frontend job.
6 min read2
Debounce vs Throttle — One Sentence to Remember Forever
Two patterns for taming fast events: debounce waits for silence, throttle limits how often. With examples, code, and interview answers.
4 min read
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