Tips & Tricks

50 tutorials

Step-by-step programming tutorials on PHP, JavaScript, Laravel, WordPress and more.

All Tips & Tricks 50 JavaScript 55 Hidden Features 42 CSS 40 PHP 37 UX 36 Performance 22 Debugging 19 Browser APIs 18 DOM 14 AJAX 12 Forms 11 Security 10 jQuery 8 Animations 7 HTML 2

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CSS Advanced

Custom Property Patterns: Fallback Chains and the Invalid-Value Trap

CSS variables can chain fallbacks, expose component APIs and scope themes - and they fail in a uniquely confusing way that every serious user needs to understand once.

Sep 5, 2025 2 min 1,639

CSS Intermediate

margin-inline and Friends: CSS That Survives Translation

margin-left breaks the moment your site meets Arabic or Hebrew. Logical properties describe direction-relative intent - and they are more ergonomic even if you never localize.

Aug 26, 2025 2 min 759

CSS Beginner

aspect-ratio Killed the Padding-Top Hack

padding-top: 56.25% wrapped in a positioned div was how we faked 16:9 boxes for fifteen years. One property replaces the whole contraption - and prevents layout shift while it's at it.

Aug 20, 2025 2 min 1,049

CSS Beginner

CSS Nesting Is Native Now - Here's What Sass Habits to Keep and Drop

The browser parses nested CSS without any build step. The syntax is almost Sass - the differences, the & rules, and the over-nesting trap are what matter.

Aug 11, 2025 2 min 1,381

CSS Intermediate

:is() and :where(): Selector Lists Without the Copy-Paste

:is() collapses repetitive selector lists, :where() does it with zero specificity - which turns out to be the secret to CSS that is easy to override.

Aug 1, 2025 2 min 1,454

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 1,144

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 1,517

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 2,436

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 1,680

JavaScript Beginner

data-* Attributes: The Contract Between Your HTML, CSS and JS

dataset gives JavaScript typed-ish access to data attributes, CSS can select on them and even display them with attr() - one mechanism, three languages, zero coupling.

Apr 16, 2025 2 min 1,392

JavaScript Intermediate

Promise.allSettled, any, race: Picking the Right Combinator

Promise.all fails everything when one request dies - usually not what a dashboard wants. The other three combinators cover the cases all() gets wrong.

Jan 13, 2025 2 min 638

JavaScript Beginner

Array.from({ length }) Is JavaScript's Missing range()

Python has range(), PHP has range() - JavaScript has a weird-looking idiom that does the same and more, once you understand why the mapping callback is built in.

Dec 24, 2024 2 min 2,895