CSS: Cascading Style Sheets MDN - Infermieristica Web



CSS3, rolled out in 2011, added additional functionalities, such as responsive Web design and support for many new font types. CSS is a style sheet language that gives appearance changes to a markup language. For example, HTML creates the basic layout of a web page, such as this paragraph of text.

css meaning in computer

CSS is essential for creating visually appealing and maintainable web pages. It enhances the website look and feel and user experience by allowing precise control over the presentation of HTML elements. Mastering CSS is crucial for effective web design and development. The specific instruction set in CSS uses some of the same words as HTML, but most individual properties are unique.

Syntax

Any internet user can recognize that, while the types of information are very similar between websites, the look and feel of one website to another can vary widely. Websites may have different color schemes or text fonts to match their branding. Some websites may change the look of the navigation web development css cascading bar or include very specific calls to action. In each case, the types of content, such as text, links, and images, are the same, but how they are formatted and presented is very different. CSS (Cascading Style Sheets) is a language designed to simplify the process of making web pages presentable.

css meaning in computer

For example, it can present a printer-friendly version of the page when requested. CSS3 took this a step further by introducing query capabilities to respond to the dimensions of a viewport or a device, the portrait or landscape orientation of the device and the screen resolution. For these sites, the owner often desires a cohesive look with the different pages. In this regard, CSS files can specify how specific components will look on each page; they can be considered a “dress code” for the website. For example, links may always have the same font, text size, and color when activated.

CSS Framework

CSS is easy to learn and understand, but it provides powerful control over the presentation of an HTML document. CSS stands for Cascading Style Sheets and is the programming language responsible for the look and layout of web pages. CSS files are always created with HTML (Hypertext Markup Language) files. HTML is responsible for the content of a webpage, but by itself, it does not have features that support customization of its appearance.

CSS modules are used to avoid style conflicts, because, on modules, application of CSS rules is local rather than global by default. Additionally, modules help users reuse code components, because each component can have its own set of stylistic rules. The introduction of modules improved CSS safety by having CSS rules apply locally rather than globally by default. It is a style sheet language used to add styles to HTML documents displayed in browsers. CSS enhances the user experience by making web pages more attractive and user-friendly.

CSS modules

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 document is usually a text file structured using a markup language — HTML is the most common markup language, but you may also come across other markup languages such as SVG or XML. In the Introduction to HTML module, we covered what HTML is and how it is used to mark up documents. Headings will look larger than regular text, paragraphs break onto a new line and have space between them.

css meaning in computer

Each has its primary advantages, and many websites will use all three. The choice of which kind of style sheet to use depends upon the level and consistency of customization desired. A more thorough discussion will follow the brief overview that is next.

Advantages of CSS

External CSS is used to link all webpage with an external file. CSS properties have different allowable values, depending on which property is being specified. In our example, we have the color property, which can take various color values. However, the web would be a boring place if all websites looked like that. Using CSS, you can control exactly how HTML elements look in the browser, presenting your markup using whatever design you like. Inline CSS is a method of styling where CSS properties are directly applied to HTML elements within the body section using the style attribute.

  • Browsers, like Firefox, Chrome, or Edge, are designed to present documents visually, for example, on a computer screen, projector, or printer.
  • The class selector is used to select elements that have some class attributes.
  • Two years later the World Wide Web Consortium (W3C) adopted the first standardized specifications for CSS, called CSS1.
  • An internal style sheet only affects
    the HTML document in which it is embedded.
  • It is challenging to manage the inline function in websites compared to other types.

This further decouples the styling from the HTML document and makes it possible to restyle multiple documents by simply editing a shared external CSS file. At this point we’ve already looked at CSS fundamentals, how to style text, and how to style and manipulate the boxes that your content sits inside. Now it’s time to look at how to place your boxes in the right place in relation to the viewport, and to each other. Instead of versioning the CSS specification, W3C now periodically takes a snapshot of the latest stable state of the CSS specification and individual modules progress.

CSS defines the font, font size, font weight, position, and other visual settings. One of the goals of CSS is to allow users greater control over presentation. Someone who finds red italic headings difficult to read may apply a different style sheet.

css meaning in computer

Previously, the development of various parts of CSS specification was done synchronously, which allowed the versioning of the latest recommendations. There will never be a CSS3 or a CSS4; rather, everything is now CSS without a version number. 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. Responsive web design means the CSS uses flexible layouts, images and other techniques to style the page automatically for various screen sizes.

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. In this case, “p” (the paragraph) is called the “selector” — it’s the part of Cascading Style Sheets code specifying which HTML element the CSS styling will affect. In CSS, the selector is written to the left of the first curly bracket. The information between curly brackets is called a declaration, and it contains properties and values that are applied to the selector. CSS2, an evolution of CSS, incorporated media queries to allow developers to specify triggers for certain styles to take effect.

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