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In CSS, selectors declare which part of the markup a style applies to by matching tags and attributes in the markup itself. Many experienced developers would much rather refer to MDN documentation or other tutorials. Nevertheless, it is worth knowing that these specs exist and understanding the relationship between the CSS you are using, the browser support (see below), and the specs. A CSS stylesheet will contain many such rules, written one after the other. Presenting a document to a user means converting it into a form usable by your audience.

CSS lets you have multiple styles on one HTML page, therefore making the customization possibilities almost endless. Nowadays, this is becoming more a necessity than a commodity. You might have seen a website that fails to load completely and has a white background color with most of the text being blue and black. This means that the CSS part of the web page didn’t load correctly or it doesn’t exist altogether. CSS is not technically a necessity, but you probably wouldn’t want to look at a web page that features only HTML elements as it would look completely bare-boned.

CSS Backgrounds

Someone who finds red italic headings difficult to read may apply a different style sheet. Browser extensions like Stylish and Stylus have been created to facilitate the management of such user style sheets. It is called external because this type involves creating a separate CSS file linked with the web page to apply the defined styles to the tags. Using external CSS makes the main web page’s size light, as no CSS code needs to be written directly on that web page.

• However, the web would be a boring place if all websites looked like that.
• It is generally used with HTML to change the style of web pages and user interfaces.
• CSS was developed by W3C (World Wide Web Consortium) in 1996 for a rather simple reason.
• Here’s where the “cascading” part of cascading style sheets comes into play.
• People usually combine CSS with the HTML or XHTML markup languages.

CSS stands for Cascading Style Sheets, and it’s used to add style to a web page by dictating how a site is displayed on a browser. CSS is unique in that it doesn’t create any new elements, like HTML or what is css JavaScript. CSS comprises style rules that are interpreted by the browser and then applied to the corresponding elements in your document. A style rule set consists of a selector and declaration block.

little UI design rules that make a big impact

For example, headings (h1 elements), sub-headings (h2), sub-sub-headings (h3), etc., are defined structurally using HTML. In print and on the screen, choice of font, size, color and emphasis for these elements is presentational. Each rule or rule-set consists of one or more selectors, and a declaration block. In addition to HTML, other markup languages support the use of CSS including XHTML, plain XML, SVG, and XUL.

We can change the appearance and the layout of the webpage by using CSS. We can also define how a website’s view changes in different screens like desktops, tablets, and mobile devices. CSS is easy to learn and understand, but it provides powerful control over the presentation of an HTML document. This will link the .html file to your style sheet (in this case, mysitestyle.css), and all of the CSS instructions in that file will then apply to your linked .html pages. The coding language that serves as the foundation for all web development? Well, if HTML is the first language you’ll want to learn when you’re interested in building websites, its cousin CSS is a close second coding language to learn.