Header Use the Header component to create a header that has all of its items aligned vertically with consistent horizontal spacing
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All items directly under the Header component should be a Header.Item component. Inside these components can be anything (text, forms, images...), and the Header.Item component will make sure these elements vertically align with each other.
Header.Item elements have a built-in margin that will need to be overridden with the mr={0} props for the last element in the container. We relied on the prop here instead of :last-child because the last child isn't always the item visible. On responsive pages, there's a mobile menu that gets presented to the user at smaller breakpoints.
< Header >
< Header.Item >
< Header.Link href = " # " fontSize = { 2 } >
< Octicon icon = { MarkGithubIcon } size = { 32 } sx = { { mr : 2 } } />
< span > GitHub </ span >
</ Header.Link >
</ Header.Item >
< Header.Item full > Menu </ Header.Item >
< Header.Item sx = { { mr : 0 } } >
< Avatar src = " https://github.com/octocat.png " size = { 20 } square alt = " @octocat " />
</ Header.Item >
</ Header >
< Header >
< Header.Item > Item 1 </ Header.Item >
< Header.Item full border = { 1 } borderStyle = " solid " >
Item 2
</ Header.Item >
< Header.Item sx = { { mr : 0 } } > Item 3 </ Header.Item >
</ Header >
< Header >
< Header.Item >
< Header.Link href = " # " > About </ Header.Link >
</ Header.Item >
< Header.Item >
< Header.Link href = " # " > Releases </ Header.Link >
</ Header.Item >
< Header.Item >
< Header.Link href = " # " > Team </ Header.Link >
</ Header.Item >
</ Header >
Name Type Default Description full string Stretches item to fill the available space
sx SystemStyleObject
Name Type Default Description href string URL to be used for the Link
as React.ElementType "a" The underlying element to render — either a HTML element name or a React component.
sx SystemStyleObject Additional props are passed to the <a> element. See a docs for a list of props accepted by the <a> element.
Component props and basic example usage of the component are documented on primer.style/react . Component does not have any unnecessary third-party dependencies. Component can adapt to different themes. Component can adapt to different screen sizes. Component has robust unit test coverage (100% where achievable). Component has visual regression coverage of its default and interactive states. Component does not introduce any axe violations. Component has been manually reviewed by the accessibility team and any resulting issues have been addressed. Component is used in a production application. Common usage examples are documented on primer.style/react . Common usage examples are documented in storybook stories. Component has been reviewed by a systems designer and any resulting issues have been addressed. Component does not introduce any performance regressions. Component API has been stable with no breaking changes for at least one month. Feedback on API usability has been sought from developers using the component and any resulting issues have been addressed. Component has corresponding design guidelines documented in the interface guidelines . Component has corresponding Figma component in the Primer Web library. Tooling (such as linters, codemods, etc.) exists to prevent further use of alternatives.