network

3 tutorials

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

All JavaScript 55 Tips & Tricks 50 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

Latest Popular

JavaScript Intermediate

navigator.onLine Lies - Build Offline Detection That Doesn't

onLine only knows if there is a network interface, not whether the internet works. Real offline handling means verified checks and a retry queue for failed writes.

May 5, 2025 2 min 1,759

JavaScript Intermediate

fetch() With a Deadline: AbortSignal.timeout and Friends

fetch waits forever by default. One static method gives every request a timeout, and combining signals cancels stale searches the moment the user keeps typing.

Apr 4, 2025 2 min 1,899

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 4,434

Carlo Fontanos

navigator.onLine Lies - Build Offline Detection That Doesn't

fetch() With a Deadline: AbortSignal.timeout and Friends

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