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Is the declaration, and again, “p” (meaning the HTML paragraph) is the selector. These same basic principles can be applied to change font sizes, background colors, margin indentations, and more on your web page by choosing the specific selector. Tags like were introduced in HTML version 3.2, and it caused quite a lot of trouble for web developers.

css meaning in computer

They are separated with a colon and delineated with a semi-colon. Similarly, if a browser encounters a selector that it doesn’t understand, it will just ignore the whole rule and move on to the next one. 📌 PS – If you’d like to learn more about CSS, front end development, or web design, Skillcrush can https://deveducation.com/ help you get there! Our Break Into Tech course is a comprehensive program designed to help total beginners in tech start a new and fulfilling career. Here we will show one HTML page displayed with 4 different stylesheets. Elements.) In CSS, you choose which properties you want to affect in the rule.

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New browsers will interpret the line using pixels, but then override it with the line using calc() as that line appears later in the cascade. In our Debugging CSS article in the next module we will be using browser DevTools to debug CSS problems, and will learn more about how the browser interprets CSS. Although HTML and CSS are closely related, CSS determines style whereas HTML determines content and structure. Would cause one specific headline on a single .html page to appear in violet, 40 point font.

In this specific example, we are only changing the HTML (hypertext markup language) tags and , rather than creating any new class or id selectors. CSS and HTML work together with different areas of focus to create the webpage a user sees. These differing foci result because CSS is a stylesheet language, whereas HTML is a markup language. So, HTML structures web pages with elements like headers, paragraphs and lists while CSS contains the style information for those structures. While neither HTML or CSS is more complex than the other in terms of syntax, a major difference is that HTML can contain CSS within its code and files, but CSS cannot contain HTML. Both HTML and CSS are mutually containing, however, meaning CSS and HTML share tag names with each other.


There are also other people, known as invited experts, who act as independent voices; they are not linked to a member organization. We’ll go over each style briefly, for an in-depth explanation of each method, there will be a link below the overview. In addition, a website that uses semantics becomes more informative, adaptable, and accessible to those who use screen readers to access websites. A noticeable advantage of using semantic tags is that web crawlers are able to index the web page or website easily, improving SEO in return. Semantics has been an integral part of HTML since its inception in the early 90s.

In the example below I have used the British English spelling for color, which makes that property invalid as it is not recognized. All of the other CSS have been applied however; only the invalid line is ignored. If a browser is parsing your rules, and encounters a property or value that it doesn’t understand, it ignores it and why do we need cascading style sheets moves on to the next declaration. It will do this if you have made an error and misspelled a property or value, or if the property or value is just too new and the browser doesn’t yet support it. The CSS layout cookbook aims to bring together recipes for common layout patterns, things you might need to implement in your sites.