Code Snippets

JavaScript Snippets

Vanilla answers, no build step required - the browser APIs and DOM patterns that work without pulling in a framework first.

Everything in JavaScript Snippets

10/06/2026
Find Broken Images on a Website: Three Free Ways
Three free ways to find images that do not load: the browser's network panel, a one-line console snippet, and a checker that reads a whole page at once.
09/26/2026
JavaScript fetch timeout: AbortSignal.timeout() and any()
fetch() has no timeout option. AbortSignal.timeout() adds one, AbortSignal.any() combines it with a cancel button, and err.name tells the two apart.
12/27/2015
Require at least one checkbox, in plain JavaScript
Check so at least one checkbox on your form is checked before it’s allowed to submit: