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<nav aria-label="Default with nav element" data-view-component="true" class="UnderlineNav"> <ul data-view-component="true" class="UnderlineNav-body list-style-none"> <li data-view-component="true" class="d-inline-flex"> <a href="#" aria-current="page" data-view-component="true" class="UnderlineNav-item"> Item 1 </a></li> <li data-view-component="true" class="d-inline-flex"> <a href="#" data-view-component="true" class="UnderlineNav-item"> Item 2 </a></li> <li data-view-component="true" class="d-inline-flex"> <a href="#" data-view-component="true" class="UnderlineNav-item"> Item 3 </a></li> </ul> <div data-view-component="true" class="UnderlineNav-actions"> <button type="button" data-view-component="true" class="Button--secondary Button--medium Button"> <span class="Button-content"> <span class="Button-label">Button</span> </span> </button> </div></nav>1
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<%= render(Primer::Alpha::UnderlineNav.new(label: label, tag: tag, align: align)) do |component| %> <% Array.new(number_of_panels || 3) do |i| %> <% component.with_tab(href: "#", selected: i.zero?) { "Item #{i + 1}" } %> <% end %> <% component.with_actions do %> <%= render(Primer::Beta::Button.new) { "Button" } %> <% end %><% end %>No notes provided.
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app/components/primer/alpha/underline_nav.css
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/* UnderlineNav */.UnderlineNav { display: flex; min-height: var(--base-size-48); overflow-x: auto; overflow-y: hidden; /* stylelint-disable-next-line primer/box-shadow */ box-shadow: inset 0 -1px 0 var(--borderColor-muted); -webkit-overflow-scrolling: auto; justify-content: space-between;}.UnderlineNav .Counter { /* stylelint-disable-next-line primer/spacing */ margin-left: var(--control-medium-gap); color: var(--fgColor-default); background-color: var(--bgColor-neutral-muted, var(--color-neutral-muted)); }.UnderlineNav .Counter--primary { color: var(--fgColor-onEmphasis); background-color: var(--bgColor-neutral-emphasis); }.UnderlineNav-body { display: flex; align-items: center; gap: var(--control-medium-gap); list-style: none;}.UnderlineNav-item { position: relative; display: flex; /* stylelint-disable-next-line primer/spacing */ padding: 0 var(--control-medium-paddingInline-condensed); font-size: var(--text-body-size-medium); /* stylelint-disable-next-line primer/typography */ line-height: 30px; color: var(--fgColor-default); text-align: center; white-space: nowrap; cursor: pointer; background-color: transparent; border: 0; border-radius: var(--borderRadius-medium); align-items: center;}.UnderlineNav-item:hover,.UnderlineNav-item:focus,.UnderlineNav-item:focus-visible { color: var(--fgColor-default); -webkit-text-decoration: none; text-decoration: none; border-bottom-color: var(--borderColor-neutral-muted); outline-offset: -2px; transition: border-bottom-color 0.12s ease-out; }/* renders a visibly hidden "copy" of the label in bold, reserving box space for when label becomes bold on selected */.UnderlineNav-item [data-content]::before { display: block; height: 0; font-weight: var(--base-text-weight-semibold); visibility: hidden; content: attr(data-content); }/* increase touch target area */:is(.UnderlineNav-item::before) { position: absolute; top: 50%; left: 50%; width: 100%; height: 100%; min-height: 48px; content: ""; transform: translateX(-50%) translateY(-50%);}/* hover state was "sticking" on mobile after click */@media (pointer: fine) { .UnderlineNav-item:hover { color: var(--fgColor-default); -webkit-text-decoration: none; text-decoration: none; background: var(--control-transparent-bgColor-hover); transition: background 0.12s ease-out; } }.UnderlineNav-item.selected,.UnderlineNav-item[role='tab'][aria-selected='true'],.UnderlineNav-item[aria-current]:not([aria-current='false']) { font-weight: var(--base-text-weight-semibold); color: var(--fgColor-default); border-bottom-color: var(--underlineNav-borderColor-active); /* current/selected underline */ }:is(.UnderlineNav-item.selected,.UnderlineNav-item[role='tab'][aria-selected='true'],.UnderlineNav-item[aria-current]:not([aria-current='false']))::after { position: absolute; right: 50%; bottom: calc(50% - var(--base-size-24)); /* 48px total height / 2 (24px) + 1px */ z-index: 1; /* raise above full-width flash banner */ width: 100%; height: 2px; content: ''; /* stylelint-disable-next-line primer/colors */ background: var(--underlineNav-borderColor-active); border-radius: var(--borderRadius-medium); transform: translate(50%, -50%); }.UnderlineNav--right { justify-content: flex-end;}.UnderlineNav--right .UnderlineNav-actions { flex: 1 1 auto; }.UnderlineNav-actions { align-self: center;}.UnderlineNav--full { display: block; /* required for underline to align with additional wrapper element */}.UnderlineNav--full .UnderlineNav-body { min-height: var(--base-size-48); }.UnderlineNav-octicon { display: inline !important; /* stylelint-disable-next-line primer/spacing */ margin-right: var(--control-medium-gap); color: var(--fgColor-muted); fill: var(--fgColor-muted);}.UnderlineNav-container { display: flex; justify-content: space-between;}