Mar 2, 2009 · What is the difference between # and . when declaring a set of styles for an element and what are the semantics that come into play when deciding which one to use?

Mar 17, 2025 · I'm using Tailwind CSS v4 in my Next.js project and getting the following errors in globals.css: Unknown at rule @plugin css (unknownAtRules) Unknown at rule @custom …

I am a bit confused between these 2 selectors. Does the descendent selector: div p select all p within a div whether or not it's an immediate descedent? So if the p is inside another div it will...

Jul 15, 2009 · Update Jul 2023: Modern CSS now has @container queries support for size and soon also style & state, and that basically means a native way for an if/else condition. Below is …

Firefox 71+ (2019-12-03) and Chrome 79+ (2019-12-10) support internal mapping of the width and height HTML attributes of the IMG element to the new aspect-ratio CSS property.

Two different sets of CSS properties apply to the same HTML markup for the table, but with opposite concepts: the first one uses the default value for border-collapse (separate) and uses …

Jun 25, 2015 · I just learned about a new and uncommon CSS unit. vh and vw measure the percentage of height and width of the viewport respectively. I looked at this question from …

I have been doing some research on media queries and I still don't quite understand how to target devices of certain sizes. I want to be able to target desktop, tablet and mobile. I know that there

Sep 5, 2016 · Learn how to create line breaks in HTML using '\n' and CSS techniques on this Stack Overflow discussion.

Jul 31, 2011 · Related to How do I give text or an image a transparent background using CSS?, but slightly different. I'd like to know if it's possible to change the alpha value of a background …