Under The Hood
MSPKExploring what really happens when you write frontend code
| Platform |  | Pricing | Only free issues | Publishes | Daily |
|---|---|---|---|---|---|
| Issues | 52 | Founded | 10 months ago | Last Issue | 18 days ago |
| Active | |||||
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mspk.substack.comLatest Issues
What Actually Happens When You npm install
You type npm install and a few seconds later a node_modules folder appears with thousands of files in it. Most developers treat this as a black box. It works, so why dig into it?
Because when it breaks, and it will break, you are compl...
What will-change Actually Does to Your GPU Memory
At some point you hit a janky animation, Googled the fix, and found a Stack Overflow answer that said add will-change: transform to the element. You added it. The animation got smoother. You moved on.
Most developers stop there. But what...
Hydration Isn't Magic — Here's the Exact Sequence That Breaks It
If you have used Next.js, Nuxt, Remix, or any server-rendered React framework, you have almost certainly seen this warning at some point:
Warning: Text content did not match. Server: "Hello" Client: "Hello!"
Or the page loads...
The Scroll Performance Problem CSS Solved That JavaScript Made Worse
Scroll handlers are one of those things that seem completely reasonable until you understand what actually happens when you attach one.
Every time the user scrolls, the browser fires your handler. Not once per frame. Not throttled. Every....
How the Browser Decides Your Font Is "Loaded"
You’ve seen it happen. The page loads, text appears in a fallback font, and then a fraction of a second later everything shifts as the real font kicks in. Or worse — the text is invisible for a moment, then pops in. You didn’t write any cod...
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