JavaScript
4 posts
- 01September 17, 2026 · 3 min read
The `==` Trap and Type Coercion in JavaScript
Why is `"" == 0` true? Why is `[] == false` true? Yet why is `NaN == NaN` false? We break down JavaScript's most confusing mechanism—type coercion—and the only foolproof way to escape the mess.
- 02September 15, 2026 · 2 min read
What's the Difference Between Debounce and Throttle?
Typing "istanbul" into a search box sends 8 requests to the server. For 10,000 users, that means 80,000 requests. Debouncing drops this to 1, while throttling drops it to 4 — but they aren't the same thing, and using the right one matters.
- 03September 15, 2026 · 2 min read
Why 0.1 + 0.2 Doesn't Equal 0.3
Type `0.1 + 0.2` into your console, and you won't get `0.3`. It's not a JavaScript bug — you'll get the exact same result in Python, Java, or Go. IEEE 754, mantissas, and why you should never store money as a float.
- 04June 10, 2025 · 8 min read
Where Does TypeScript Type Safety End?
Just because the compiler passes doesn't mean your program is correct. Five places where you can lie to the type system without ever writing any, what strict mode misses, and how to plug the holes at the boundary.
