Primer CSS Header Last Updated : 28 May, 2025 Comments Improve Suggest changes Like Article Like Report Primer CSS is a free open-source CSS framework that is built upon a GitHub design system to provide support to the broad spectrum of GitHub websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by Object-Oriented CSS principles, functional CSS, and BEM architecture. It is a highly reusable model.In this article, we will learn about the Header component of the Primer CSS. One such component of the Primer CSS is the Header component. The header component as the name suggests helps us to create a header for our website. Now, what is a header? A header is a component that has all the items vertically aligned. In Primer CSS, we can create a header by adding the “.header” class to the element, and also we can create the items by adding the “.header-item” class to the element.Primer CSS Header Components: Header: The Header is added to the parent container of the header element. It wraps all the items to be vertically aligned and gives the header a black background.Header-item: The Header-item is added to all the child components inside the Header. This makes the header items vertically aligned to each other and also give them some default margin to make them look beautiful. Header-item--full: The Header-item--full class when added to a particular item makes it stretched to occupy the entire available space and pushes all the remaining items to the right side. Header-link: The Header-link is added to the anchor tags inside the header. It makes the link text to be white, and bold and gives them a 70% hover opacity when they have hovered over.Syntax:<div class="Header"> <div class="Header-item"> ... </div> <div class="Header-item"> ... </div> ...</div>Example 1: We have created a simple header with text and input fields. HTML <!DOCTYPE html> <html> <head> <title> Primer CSS Toast animation in </title> <link rel="stylesheet" href= "https://unpkg.com/@primer/css@^18.0.0/dist/primer.css"/> </head> <body> <div class="Header"> <!-- Text item --> <div class="Header-item"> GeeksforGeeks </div> <div class="Header-item"> Articles </div> <div class="Header-item"> Practice QS </div> <!-- Form item --> <div class="Header-item"> <input class="form-control Header-input" type="text"/> </div> <!-- Image item --> <div class="Header-item"> <img class="avatar" height="20" alt="@octocat" src="https://github.com/octocat.png" width="20"> </div> </div> <div> <h2>GeeksforGeeks</h2> <h3>Primer CSS Header </h3> </div> </body> </html> Output: Example 2: We have created a header with hyperlinks to the items. HTML <!DOCTYPE html> <html> <head> <title> Primer CSS Toast animation in </title> <link rel="stylesheet" href= "https://unpkg.com/@primer/css@^18.0.0/dist/primer.css"/> </head> <body> <div class="Header"> <!-- Text item --> <div class="Header-item"> <a href="#" class="Header-link"> GeeksforGeeks </a> </div> <div class="Header-item"> <a href="/articles.html" class="Header-link"> Articles </a> </div> <div class="Header-item"> <a href="/DSA.html" class="Header-link"> DSA Q/s </a> </div> <!-- Form item --> <div class="Header-item--full"> <input class="form-control Header-input" type="text"/> </div> <!-- Image item --> <div class="Header-item"> <img class="avatar" height="20" alt="@octocat" src="https://github.com/octocat.png" width="20"> </div> </div> <div> <h2>GeeksforGeeks</h2> </div> </body> </html> Output: Comment More infoAdvertise with us Next Article Primer CSS Labels saikatmohanta43434 Follow Improve Article Tags : Web Technologies CSS Primer-CSS Primer-CSS Component Similar Reads Primer CSS Primer CSS is a free open-source CSS framework built with the GitHub design system to support the broad spectrum of Github websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure that our patterns are steady and intero 3 min read Primer CSS Introduction Primer CSS is a free open-source CSS framework that is built with the GitHub design system to provide support to the broad spectrum of Github websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are ste 4 min read Primer CSS UtilityPrimer CSS AnimationsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 4 min read Primer CSS BordersPrimer CSS is a free and open-source CSS framework. It is built upon the systems that create the foundation of the basic style elements such as spacing, typography, and color. Created with GitHub’s design system, it is highly reusable and flexible.Primer CSS Borders is a utility class that applies b 3 min read Primer CSS Box shadowPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 4 min read Primer CSS ColorsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. It is highly reusable and flexible. I 7 min read Primer CSS DetailsPrimer CSS is a free open-source CSS framework that is built upon a GitHub design system to provide support to the broad spectrum of GitHub websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are stead 2 min read Primer CSS FlexboxPrimer CSS is a free open-source CSS framework based on principles that set the foundation for basic design elements like spacing, typeface, and color. This rigorous approach ensures that our patterns are consistent and interoperable.Primer CSS Flexbox:Flex container: Flex Container is used to make 6 min read Primer CSS GridPrimer CSS is a free open-source CSS framework that is built with the GitHub design system to provide support to the broad spectrum of Github websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure that our patterns ar 4 min read Primer CSS LayoutPrimer CSS is a free and open-source CSS framework. It is built upon the systems that create the foundation of the basic style elements such as spacing, typography, and color. Created with GitHub’s design system, it is highly reusable and flexible.Primer CSS Layout is used to change the document lay 2 min read Primer CSS MarginPrimer CSS is a free and open-source CSS framework that is built using the GitHub design system for providing support to the broad spectrum of GitHub websites. It helps in creating the foundation of the basic style elements such as spacing, components, typography, color, etc.In this article, we'll s 3 min read Primer CSS PaddingPadding is used to create space around the element, inside any defined border. We can set different padding for individual sides(top, right, bottom, left). It is important to add border properties to implement padding properties.Primer CSS Padding:Shorthand: Padding has many variations, that can be 3 min read Primer CSS TypographyPrimer CSS is a free open-source CSS framework that is built upon a GitHub design system to provide support to the broad spectrum of GitHub websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are stead 5 min read Primer CSS ComponentsPrimer CSS AlertsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. It is highly reusable and flexible. It is created with GitHub’s design system.Alerts are used to signify an important message to th 3 min read Primer CSS AutocompletePrimer CSS is a free open-source CSS framework that's created upon systems that make the insights of the essential style elements like spacing, typography, and color. This methodical system makes sure its patterns are steady and interoperable with every other. It's largely reusable and adaptable.  I 3 min read Primer CSS AvatarsPrimer CSS is a free open-source CSS framework that's built upon systems that make the inspiration of the essential style elements like spacing, typography, and color. This systematic method makes sure its patterns are steady and interoperable with every other. it's highly reusable and versatile.  I 4 min read Primer CSS BlankslatePrimer CSS is a free and open-source CSS framework. It is built upon the systems that create the foundation of the basic style elements such as spacing, typography, and color. Created with GitHub’s design system, it is highly reusable and flexible. Primer CSS Blankslate is used as a placeholder when 5 min read Primer CSS Box OverlayPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 2 min read Primer CSS Branch namePrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 2 min read Primer CSS BreadcrumbsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. It is highly reusable and flexible. It is created with GitHub’s design system.Primer CSS offers us so many components, and Breadcru 2 min read Primer CSS ButtonsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 2 min read Primer CSS DropdownPrimer CSS is a free and open-source CSS framework that is built using the GitHub design system for providing support to the broad spectrum of GitHub websites. It helps in creating the foundation of the basic style elements such as spacing, components, typography, color, etc.Dropdowns are lightweigh 4 min read Primer CSS FormsPrimer CSS is a free and open-source CSS framework. It is built upon the systems that create the foundation of the basic style elements such as spacing, typography, and color. Created with GitHub’s design system, it is highly reusable and flexible.Primer CSS Forms provide different components for in 6 min read Primer CSS HeaderPrimer CSS is a free open-source CSS framework that is built upon a GitHub design system to provide support to the broad spectrum of GitHub websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are stead 3 min read Primer CSS LabelsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 3 min read Primer CSS LinksPrimer CSS is a free and open-source CSS framework. It is built upon the systems that create the foundation of the basic style elements such as spacing, typography, and colour. Created with GitHub’s design system, it is highly reusable and flexible.Primer CSS Links are used to decorate links in the 3 min read Primer CSS LoadersPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 2 min read Primer CSS MarkdownPrimer CSS is a free open-source CSS framework built with the GitHub design system to support the broad spectrum of Github websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure that our patterns are steady and intero 3 min read Primer CSS NavigationPrimer CSS is a free open-source CSS framework that is formed upon systems that establish the foundation of the basic style elements such as spacing, typography, and color. This systematic structure ensures our patterns are stable and interoperable with every other. Its approach to CSS is inspired b 6 min read Primer CSS PaginationPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 2 min read Primer CSS PopoverPrimer CSS is a free open-source CSS framework that is built upon a GitHub design system to provide support to the broad spectrum of GitHub websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are stead 5 min read Primer CSS ProgressPrimer CSS is a free open-source CSS framework that is built upon the GitHub design system to provide support to the broad spectrum of Github websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are ste 4 min read Primer CSS Select menuPrimer CSS is a free open-source CSS framework built on principles that establish the foundation for basic design elements including spacing, typeface, and color. Our patterns will be consistent and compatible as a result of this method. Its CSS approach is influenced by object-oriented CSS concepts 4 min read Primer CSS SubheadPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 2 min read Primer CSS TimelinePrimer CSS is a free open-source CSS framework that is built upon the GitHub design system to provide support to the broad spectrum of Github websites. It creates the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are ste 7 min read Primer CSS ToastsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 3 min read Primer CSS TruncatePrimer CSS is a CSS framework that comes with pre-styled components and a design language with spacing, typography, and Theming that helps in building a website effectively. This systematic method makes sure our patterns are steady and interoperable with every other. It is created with GitHub’s desi 2 min read Primer CSS MarketingPrimer CSS Marketing ButtonsPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. It is highly reusable and flexible. It is created with GitHub’s design system.Buttons are used to define an action that can be perf 2 min read Primer CSS Marketing FiltersPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. It is highly reusable and flexible. It is created with GitHub’s design system.Filters are used to change the overall background or 2 min read Primer CSS Marketing LinksPrimer CSS is a free open-source CSS framework that is built upon systems that create the foundation of the basic style elements such as spacing, typography, and color. This systematic method makes sure our patterns are steady and interoperable with every other. Its approach to CSS is influenced by 2 min read Primer CSS Marketing TypographyTypography is a feature of Primer for styling and formatting the text content. It is used to create headings, subheadings, paragraphs, pull quotes, add more design-oriented font styles, and much more. It's responsive, but on a smaller scale, and the headlines are set in the marketing typeface.Primer 3 min read Like