JavaScript

D

PHP Intermediate

Dark Mode End to End: OS Preference, Toggle, and No Flash of White

Respect the system setting, let users override it, remember the choice, and never flash the wrong theme on load - the complete wiring across CSS, JS and PHP.

Jun 6, 2026 3 min 119 Read →

I

PHP Intermediate

Instant Search Done Right: Debounce, Abort, Escape, Limit

Search-as-you-type touches four failure modes at once - request spam, stale responses, LIKE wildcards and unbounded scans. The complete pattern, both sides of the wire.

May 26, 2026 3 min 326 Read →

C

PHP Advanced

CSRF Protection from Scratch: What the Frameworks Are Doing for You

A hidden token, a session comparison, a header for AJAX - the whole defense is 30 lines of PHP and JS. Build it once by hand and framework CSRF errors stop being mysterious.

May 18, 2026 2 min 166 Read →

J

JavaScript Intermediate

jQuery and Vanilla JS Are Friends: The Interop Escape Hatches

You don't migrate a decade of jQuery in one heroic rewrite - you make the two worlds interoperate. Element extraction, wrapping, iteration and event bridging, mapped precisely.

May 8, 2026 2 min 159 Read →

0

JavaScript Intermediate

0.1 + 0.2 Made Your Invoice Wrong: Money Math in JavaScript

Floating point cannot represent most decimal fractions, and prices are decimal fractions. Work in integer cents, round deliberately, and let Intl handle the display.

Jul 24, 2025 2 min 1,085 Read →

G

JavaScript Beginner

Generate and Download Files in the Browser: Blob + download

CSV exports, JSON backups, generated reports - the browser can create files and hand them to the user without the server ever touching the data.

Jul 14, 2025 2 min 1,428 Read →

V

JavaScript Advanced

View Transitions: The Crossfade Between States Is Now One Call

document.startViewTransition snapshots your page, lets you mutate the DOM, and animates between the two states - list reorders and theme switches suddenly look expensive.

Jul 4, 2025 2 min 1,891 Read →

E

JavaScript Intermediate

element.animate(): Animations Without a Stylesheet Round-Trip

The Web Animations API runs keyframe animations from JavaScript with play, pause, reverse and a finished promise - no class juggling, no injected style tags.

Jun 27, 2025 2 min 1,534 Read →

W

JavaScript Advanced

Why "👨‍👩‍👧".length Is 8, and How to Count What Users See

String length counts UTF-16 code units, not characters - so emoji truncation splits families into corpses. Intl.Segmenter counts graphemes, words and sentences correctly.

Jun 23, 2025 2 min 1,174 Read →

"

JavaScript Beginner

"1 item" vs "2 items": Stop Writing That Ternary

Intl.PluralRules knows every language's plural categories and Intl.ListFormat writes "a, b, and c" correctly - two tiny APIs that end string-building guesswork.

Jun 14, 2025 2 min 2,382 Read →

S

JavaScript Beginner

Sorting "file10.txt" After "file2.txt": Natural Sort in One Line

Plain sort puts item10 before item2 because strings compare character by character. Intl.Collator fixes it, handles accents and case, and is faster than localeCompare in loops.

Jun 7, 2025 2 min 2,374 Read →

J

JavaScript Intermediate

JSON.stringify Takes Two More Arguments Than You Think

The replacer filters and redacts on the way out, the reviver rebuilds Dates on the way in, and toJSON lets objects decide their own serialization. All native, all ignored.

Jun 3, 2025 2 min 1,617 Read →