Jul 12, 2010 · A CSS selector can contain more than one simple selector. Between the simple selectors, we can include a combinator. There are four different combinators in CSS3: …

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?

@font-face { /* CSS HERE */ } So is this @ symbol something new in CSS3, or something old that I've somehow overlooked? Is this something like where with an ID you use #, and with a class …

Jul 30, 2009 · I found this CSS code and I ran it to see what it does and it outlined EVERY element on the page, Can someone explain what the asterisk * does in CSS? <style> * { outline: 2px …

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-variant …

Aug 7, 2020 · Is it possible to select elements in CSS by their HTML5 data attributes (for example, data-role)?

May 9, 2010 · Learn about CSS selectors, including how to use "and" and "or" for efficient styling on Stack Overflow.

I saw an animated project with a bunch of '$' in it. I have no idea what dollar signs are used for in CSS. I'm guessing it is for animations. Here is a sample of some of the code I was looking at: $

14 Just add this to your css, It will automaticly shrink and expand with keeping the original ratio.

但是我们自己写css的时候，仅仅是封装一些常用的简单的类，绝大多数的css，都需要动手去写css。 比如你要写个宽度12像素。