Browser APIs

18 tutorials

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

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

Latest Popular

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.

Apr 12, 2024 2 min 5,034

JavaScript Advanced

Do the Boring Work When the Browser Is Bored: requestIdleCallback

Analytics batching, prefetching, cache warming - none of it should compete with user interaction. requestIdleCallback runs your low-priority work in the gaps.

Apr 6, 2024 2 min 4,191

JavaScript Intermediate

Infinite Scroll Without a Single Scroll Listener

Scroll listeners fire hundreds of times per second and need throttling, math and luck. IntersectionObserver watches a sentinel element and calls you exactly when it matters.

Mar 19, 2024 2 min 1,776

JavaScript Beginner

Stop Parsing Query Strings by Hand

Splitting location.search on & and = is a bug farm: encoding, arrays and empty values all break it. URLSearchParams and the URL API handle every edge case and read better.

Mar 5, 2024 2 min 1,833

JavaScript Intermediate

Why Your Analytics Miss Closing Tabs (and How sendBeacon Fixes It)

fetch() calls fired when a user closes the tab often never leave the browser. navigator.sendBeacon() exists precisely for this moment, and it is a one-line change.

Feb 5, 2024 2 min 4,504

JavaScript Beginner

"3 Days Ago" Without a Library: Intl.RelativeTimeFormat

You do not need moment.js or dayjs to print "yesterday" or "in 3 weeks". The Intl API does relative time, in the user's own language, with zero dependencies.

Jan 26, 2024 2 min 5,444