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Carl Victor Fontanos
Carl Victor Fontanos

Carl Victor Fontanos

Software Engineer

I build web applications and share what I learn along the way.

© 2026

UX

36 tutorials

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

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

Fluid Typography with One Line of clamp()

Stop writing a font-size media query for every breakpoint. clamp() scales type smoothly with the viewport between a floor and a ceiling you control.

2 min 4,492
CSS Beginner

:focus-visible Ends the outline: none Wars

Designers hate focus rings on click, keyboard users need them to navigate at all. :focus-visible gives each group what they want - and browsers already use it by default.

2 min 3,758
CSS Beginner

The Two-Word Fix for Ugly Headline Wrapping

A headline that wraps leaving one lonely word on the second line looks broken. text-wrap: balance makes the browser distribute the words evenly, and text-wrap: pretty fixes paragraphs.

2 min 851
CSS Intermediate

CSS-Only Carousels with scroll-snap

A swipeable, momentum-friendly, accessible carousel needs no JavaScript at all. scroll-snap turns a plain overflow container into one, and it feels native because it is.

2 min 4,598
JavaScript Intermediate

Responsive JavaScript Without Resize Listeners

Checking window.innerWidth on every resize event is wasteful and drifts out of sync with your CSS. matchMedia gives JavaScript the same breakpoints CSS uses, with change events.

2 min 4,865
JavaScript Intermediate

Let Users Paste Screenshots Straight into Your App

Ctrl+V with an image on the clipboard fires a paste event carrying a real File object. Ten lines of code turn any form into a screenshot-friendly uploader.

2 min 5,035