SensuousBeauty | What is CSS and how does it work?
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What is CSS and how does it work?

We recommend that you work through our Introduction to HTML module first. Elements.) In CSS, you choose which properties you want to affect in the rule. Using a text editor, paste the three lines of CSS (above) into a new file. Save the file as style.css in a directory named styles. Rather than by laboriously going through the document and changing the color for each individual h1 element.

CSS Grid Layout is a two-dimensional layout system for the web. It lets you lay content out in rows and columns, and has many features that make building complex layouts straightforward. This article will give you all you need to know to get started with page layout, then test your grid skills before moving on. If you have observed how one style is fighting against another in order to style the element. CSS is easy to learn and understand, but it provides powerful control over the presentation of an HTML document.


When we look at a well-marked up HTML document, even something as simple as our example, we can see how the browser is making the HTML readable by adding some default styling. All modern browsers display HTML content by default in pretty much the same way. Cascading Style Sheets — or CSS — is the first technology you should start learning after HTML. While HTML is used to define the structure and semantics of your content, CSS is used to style it and lay it out. For example, you can use CSS to alter the font, color, size, and spacing of your content, split it into multiple columns, or add animations and other decorative features.

What is CSS

Here, you will learn CSS all the basic to advanced concepts, such as properties, selectors, functions, media queries and more. If you’re just starting out with both CSS and HTML, you can even take a learning path tailored to both. HTML is used to structure the website, and then CSS is layered over top for style. With both skills, you’ll have the full suite required to get down to work designing and building websites.

CSS Colors, Fonts and Sizes

It applies that rule to each one of the three s, then paints the final visual representation to the screen. A plain HTML document is generally accessible to everyone — as you start to style that document it is important that you don’t make it less accessible. Here we will show one HTML page displayed with 4 different stylesheets. Once you understand css web development the fundamentals of HTML, we recommend that you learn further HTML and CSS at the same time, moving back and forth between the two topics. This is because HTML is far more interesting and much more fun to learn when you apply CSS, and you can’t learn CSS without knowing HTML. You should learn the basics of HTML before attempting any CSS.

What is CSS

The CSS font-size property defines the text size to be used. In addition, using CSS can help to keep your HTML code clean and organized. If your website has a lot of styling information included in the HTML code, it can be difficult to read and edit. By keeping the styling information in a separate CSS file, it will be much easier to read and edit your HTML code.

My First CSS Example

Browsers, like Firefox, Chrome, or Edge, are designed to present documents visually, for example, on a computer screen, projector, or printer. As we have mentioned before, CSS is a language for specifying how documents are presented to users — how they are styled, laid out, etc. However, the web would be a boring place if all websites looked like that.

  • A. CSS was established to address the issue of tags for formatting a web page, which were not intended in HTML.
  • You can also use CSS to layout elements by positioning them in specified areas of your page.
  • At W3Schools you will find complete CSS references of all properties and selectors with syntax, examples, browser support, and more.
  • Save the code below as index.html in a folder on your machine.

Would cause one specific headline on a single .html page to appear in violet, 40 point font. 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 Practice Quiz Sets

At W3Schools you will find complete CSS references of all properties and selectors with syntax, examples, browser support, and more. After many months of debates over how CSS Nesting could work, we ended up with the best possible solution. In the end, browser engineers figured out how to make the parsing engine handle nested type selectors (element selectors).

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. Your visitor may well be on a computer with a mouse or trackpad, or a phone with a touchscreen. Or they might be using a screen reader, which reads out the content of the document, or they may need to use much larger text, or be navigating the site using the keyboard only. You can copy the code from below if you want to work on your own computer. Save the code below as index.html in a folder on your machine.

CSS: Cascading Style Sheets

It can be used to create a layout — for example, turning a single column of text into a layout with a main content area and a sidebar for related information. Have a look at the links in this paragraph for specific examples. Tags like were introduced in HTML version 3.2, and it caused quite a lot of trouble for web developers.

What is CSS

CSS is used to define styles for your web pages, including the design, layout
and variations in display for different devices and screen sizes. Grid systems are a very common feature used in CSS layouts. Prior to CSS Grid Layout, they tended to be implemented using floats or other layout features. You’d first imagine your layout as a set number of columns (e.g., 4, 6, or 12), and then you’d fit your content columns inside these imaginary columns. In this article, we’ll explore how these older methods work so that you understand how they were used if you work on an older project.

CSS: all about boxes

Here we look at text styling fundamentals, including setting font, boldness, italics, line and letter spacing, drop shadows, and other text features. We round off the module by looking at applying custom fonts to your page, and styling lists and links. CSS can be used for very basic document text styling — for example, for changing the color and size of headings and links.

Specificity refers to the relative weights of various rules.[17] It determines which styles apply to an element when more than one rule could apply. Based on the specification, a simple selector (e.g. H1) has a specificity of 1, class selectors have a specificity of 1,0, and ID selectors have a specificity of 1,0,0. With the basics of the CSS language covered, the next CSS topic for you to concentrate on is styling text — one of the most common things you’ll do with CSS.

CSS Grid Layout

This group is made of representatives of browser vendors and other companies who have an interest in CSS. There are also other people, known as invited experts, who act as independent voices; they are not linked to a member organization. To solve this problem, the World Wide Web Consortium (W3C) created CSS. Use our color picker to find different RGB, HEX and HSL colors.

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