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<div style="max-width: 400px"> <tree-view> <ul role="tree" data-view-component="true" class="TreeViewRootUlStyles"> <tree-view-sub-tree-node> <li role="none" data-view-component="true" class="TreeViewItem"> <div class="TreeViewItemContainer" style="--level: 1;"> <div style="grid-area: spacer; display: flex;"> <div style="width: 100%; display: flex;"> </div> </div> <div data-target="tree-view-sub-tree-node.toggleButton" class="TreeViewItemToggle TreeViewItemToggleHover TreeViewItemToggleEnd"> <svg data-target="tree-view-sub-tree-node.expandedToggleIcon" hidden="hidden" style="pointer-events: none;" aria-hidden="true" height="12" viewBox="0 0 12 12" version="1.1" width="12" data-view-component="true" class="octicon octicon-chevron-down"> <path d="M6 8.825c-.2 0-.4-.1-.5-.2l-3.3-3.3c-.3-.3-.3-.8 0-1.1.3-.3.8-.3 1.1 0l2.7 2.7 2.7-2.7c.3-.3.8-.3 1.1 0 .3.3.3.8 0 1.1l-3.2 3.2c-.2.2-.4.3-.6.3Z"></path> </svg> <svg data-target="tree-view-sub-tree-node.collapsedToggleIcon" style="pointer-events: none;" aria-hidden="true" height="12" viewBox="0 0 12 12" version="1.1" width="12" data-view-component="true" class="octicon octicon-chevron-right"> <path d="M4.7 10c-.2 0-.4-.1-.5-.2-.3-.3-.3-.8 0-1.1L6.9 6 4.2 3.3c-.3-.3-.3-.8 0-1.1.3-.3.8-.3 1.1 0l3.3 3.2c.3.3.3.8 0 1.1L5.3 9.7c-.2.2-.4.3-.6.3Z"></path> </svg> </div> <button onclick="alert('Shhhh')" id="node-a688be96-b3ef-43df-86bf-4852a2cb1ab6-content" role="treeitem" tabindex="0" aria-expanded="false" aria-level="1" aria-selected="false" aria-checked="false" aria-labelledby="node-a688be96-b3ef-43df-86bf-4852a2cb1ab6-content" aria-disabled="false" data-target="tree-view-sub-tree-node.node" data-node-type="sub-tree" data-path="["Secrets"]" data-view-component="true" class="TreeViewItemContent"> <span class="TreeViewItemContentText">Secrets</span> </button> </div> <ul data-target="tree-view-sub-tree-node.subTree" role="group" style="list-style: none;" hidden="hidden" data-view-component="true" class="p-0 m-0"> <li role="none" data-view-component="true" class="TreeViewItem"> <div class="TreeViewItemContainer" style="--level: 2;"> <div style="grid-area: spacer; display: flex;"> <div style="width: 100%; display: flex;"> <div class="TreeViewItemLevelLine"></div> </div> </div> <button onclick="alert(42)" id="node-80d259fc-c524-49ec-af09-c9f032c32390-content" role="treeitem" tabindex="-1" aria-level="2" aria-selected="false" aria-checked="false" aria-labelledby="node-80d259fc-c524-49ec-af09-c9f032c32390-content" aria-disabled="false" data-node-type="leaf" data-path="["Secrets","Life and the universe"]" data-view-component="true" class="TreeViewItemContent"> <span class="TreeViewItemContentText">Life and the universe</span> </button> </div> </li> <li role="none" data-view-component="true" class="TreeViewItem"> <div class="TreeViewItemContainer" style="--level: 2;"> <div style="grid-area: spacer; display: flex;"> <div style="width: 100%; display: flex;"> <div class="TreeViewItemLevelLine"></div> </div> </div> <button onclick="alert('Love')" id="node-83f726ae-e0de-4593-8e93-1b531a746aae-content" role="treeitem" tabindex="-1" aria-level="2" aria-selected="false" aria-checked="false" aria-labelledby="node-83f726ae-e0de-4593-8e93-1b531a746aae-content" aria-disabled="false" data-node-type="leaf" data-path="["Secrets","Secret ingredient"]" data-view-component="true" class="TreeViewItemContent"> <span class="TreeViewItemContentText">Secret ingredient</span> </button> </div> </li> </ul> </li> </tree-view-sub-tree-node> <li role="none" data-view-component="true" class="TreeViewItem"> <div class="TreeViewItemContainer" style="--level: 1;"> <div style="grid-area: spacer; display: flex;"> <div style="width: 100%; display: flex;"> </div> </div> <button onclick="alert('Tweetment')" id="node-ab7843e5-fe1f-41d0-9b7f-5091343a7644-content" role="treeitem" tabindex="-1" aria-level="1" aria-selected="false" aria-checked="false" aria-labelledby="node-ab7843e5-fe1f-41d0-9b7f-5091343a7644-content" aria-disabled="false" data-node-type="leaf" data-path="["What do you give a sick bird?"]" data-view-component="true" class="TreeViewItemContent"> <span class="TreeViewItemContentText">What do you give a sick bird?</span> </button> </div> </li> </ul> </tree-view></div>
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<div style="max-width: 400px"> <%= render(Primer::Alpha::TreeView.new(node_variant: :button)) do |tree_view| %> <% tree_view.with_sub_tree(label: "Secrets", expanded: expanded, onclick: "alert('Shhhh')", disabled: disabled) do |sub_tree| %> <% sub_tree.with_leaf(label: "Life and the universe", onclick: "alert(42)", disabled: disabled) %> <% sub_tree.with_leaf(label: "Secret ingredient", onclick: "alert('Love')", disabled: disabled) %> <% end %> <% tree_view.with_leaf(label: "What do you give a sick bird?", onclick: "alert('Tweetment')", disabled: disabled) %> <% end %></div>
No notes provided.
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app/components/primer/alpha/tree_view.css
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/* stylelint-disable selector-max-type -- Copied from primer/react */.TreeViewRootUlStyles { padding: 0; margin: 0; list-style: none; /* * WARNING: This is a performance optimization. * * We define styles for the tree items at the root level of the tree * to avoid recomputing the styles for each item when the tree updates. * We're sacrificing maintainability for performance because TreeView * needs to be performant enough to handle large trees (thousands of items). * * This is intended to be a temporary solution until we can improve the * performance of our styling patterns. * * Do NOT copy this pattern without understanding the tradeoffs. */}.TreeViewRootUlStyles .TreeViewItem { outline: none; }:is(.TreeViewRootUlStyles .TreeViewItem):focus-visible > div { box-shadow: var(--boxShadow-thick) var(--fgColor-accent); }@media (forced-colors: active) {:is(.TreeViewRootUlStyles .TreeViewItem):focus-visible > div { outline: 2px solid HighlightText; /* stylelint-disable-next-line declaration-property-value-no-unknown -- Copied from primer/react */ outline-offset: -2; } }[data-has-leading-action]:is(.TreeViewRootUlStyles .TreeViewItem) { --has-leading-action: 1; }.TreeViewRootUlStyles .TreeViewItemContainer { --level: 1; --toggle-width: 1rem; --min-item-height: 2rem; position: relative; display: grid; width: 100%; font-size: var(--text-body-size-medium); color: var(--fgColor-default); border-radius: var(--borderRadius-medium); grid-template-columns: var(--spacer-width) var(--leading-action-width) var(--toggle-width) 1fr; grid-template-areas: 'spacer leadingAction toggle content'; --leading-action-width: calc(var(--has-leading-action, 0) * 1.5rem); --spacer-width: calc(calc(var(--level) - 1) * (var(--toggle-width) / 2)); }:is(.TreeViewRootUlStyles .TreeViewItemContainer):hover { background-color: var(--control-transparent-bgColor-hover); }@media (forced-colors: active) {:is(.TreeViewRootUlStyles .TreeViewItemContainer):hover { outline: 2px solid transparent; outline-offset: -2px; } }@media (pointer: coarse) {.TreeViewRootUlStyles .TreeViewItemContainer { --toggle-width: 1.5rem; --min-item-height: 2.75rem; } }:is(.TreeViewRootUlStyles .TreeViewItemContainer):has(.TreeViewFailureMessage):hover { cursor: default; background-color: transparent; }@media (forced-colors: active) {:is(.TreeViewRootUlStyles .TreeViewItemContainer):has(.TreeViewFailureMessage):hover { outline: none; } }:is(.TreeViewRootUlStyles .TreeViewItemContainer):has([role='treeitem']:focus-visible) { box-shadow: var(--boxShadow-thick) var(--fgColor-accent); }.TreeViewRootUlStyles:where([data-omit-spacer='true']) .TreeViewItemContainer { grid-template-columns: 0 0 0 1fr; }/* stylelint-disable-next-line selector-max-specificity */.TreeViewRootUlStyles .TreeViewItem > .TreeViewItemContainer:has(.TreeViewItemContent[aria-current='true']) { background-color: var(--control-transparent-bgColor-selected); /* Current item indicator */ /* stylelint-disable-next-line selector-max-specificity -- Copied from primer/react */ }:is(.TreeViewRootUlStyles .TreeViewItem > .TreeViewItemContainer:has(.TreeViewItemContent[aria-current='true']))::after { position: absolute; top: calc(50% - var(--base-size-12)); left: calc(-1 * var(--base-size-8)); width: 0.25rem; height: 1.5rem; content: ''; /* * Use fgColor accent for consistency across all themes. Using the "correct" variable, * --bgColor-accent-emphasis, causes vrt failures for dark high contrast mode */ /* stylelint-disable-next-line primer/colors */ background-color: var(--fgColor-accent); border-radius: var(--borderRadius-medium); }@media (forced-colors: active) {:is(.TreeViewRootUlStyles .TreeViewItem > .TreeViewItemContainer:has(.TreeViewItemContent[aria-current='true']))::after { background-color: HighlightText; } }.TreeViewRootUlStyles .TreeViewItemToggle { display: flex; height: 100%; /* The toggle should appear vertically centered for single-line items, but remain at the top for items that wrap across more lines. */ /* stylelint-disable-next-line primer/spacing */ padding-top: calc(var(--min-item-height) / 2 - var(--base-size-12) / 2); color: var(--fgColor-muted); grid-area: toggle; justify-content: center; align-items: flex-start; cursor: pointer; }.TreeViewRootUlStyles .TreeViewItemToggleHover:hover { background-color: var(--control-transparent-bgColor-hover); }.TreeViewRootUlStyles .TreeViewItemToggleEnd { border-top-left-radius: var(--borderRadius-medium); border-bottom-left-radius: var(--borderRadius-medium); }/* stylelint-disable-next-line selector-no-qualifying-type */.TreeViewRootUlStyles a.TreeViewItemContent:hover,.TreeViewRootUlStyles button.TreeViewItemContent:hover { -webkit-text-decoration: underline; text-decoration: underline; text-decoration-color: var(--control-fgColor-rest); }.TreeViewRootUlStyles :has(.TreeViewItemContent[aria-disabled="true"]) { cursor: not-allowed; }.TreeViewRootUlStyles .TreeViewItemContent { display: flex; height: 100%; padding: 0 var(--base-size-8); outline: none; text-align: left; -webkit-user-select: none; user-select: none; background-color: transparent; border: none; touch-action: manipulation; -webkit-tap-highlight-color: transparent; cursor: pointer; /* The dynamic top and bottom padding to maintain the minimum item height for single line items */ /* stylelint-disable-next-line primer/spacing */ padding-top: calc((var(--min-item-height) - var(--custom-line-height, 1.3rem)) / 2); /* stylelint-disable-next-line primer/spacing */ padding-bottom: calc((var(--min-item-height) - var(--custom-line-height, 1.3rem)) / 2); line-height: var(--custom-line-height, var(--text-body-lineHeight-medium, 1.4285)); grid-area: content; gap: var(--stack-gap-condensed); }:is(.TreeViewRootUlStyles .TreeViewItemContent) .TreeViewItemCheckbox { position: relative; color: var(--control-fgColor-rest); text-align: left; -webkit-user-select: none; user-select: none; background-color: transparent; border: none; border-radius: var(--borderRadius-medium); transition: background 33.333ms linear; touch-action: manipulation; -webkit-tap-highlight-color: transparent; }[aria-checked='true']:is(.TreeViewRootUlStyles .TreeViewItemContent) .FormControl-checkbox { background: var(--control-checked-bgColor-rest); border-color: var(--control-checked-borderColor-rest); transition: background-color, border-color 80ms cubic-bezier(0.32, 0, 0.67, 0) 0ms; /* unchecked -> checked */ /* stylelint-disable-next-line max-nesting-depth, selector-max-specificity -- Copied from primer/react */ }:is([aria-checked='true']:is(.TreeViewRootUlStyles .TreeViewItemContent) .FormControl-checkbox)::before { visibility: visible; transition: visibility 0s linear 0s; animation: checkmarkIn 80ms cubic-bezier(0.65, 0, 0.35, 1) forwards 80ms; }[aria-checked='mixed']:is(.TreeViewRootUlStyles .TreeViewItemContent) .FormControl-checkbox { background: var(--control-checked-bgColor-rest); border-color: var(--control-checked-borderColor-rest); transition: background-color, border-color 80ms cubic-bezier(0.32, 0, 0.67, 0) 0ms; /* unchecked -> checked */ /* stylelint-disable-next-line max-nesting-depth, selector-max-specificity -- Copied from primer/react */ }:is([aria-checked='mixed']:is(.TreeViewRootUlStyles .TreeViewItemContent) .FormControl-checkbox)::before { visibility: visible; mask-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTAiIGhlaWdodD0iMiIgdmlld0JveD0iMCAwIDEwIDIiIGZpbGw9Im5vbmUiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+CjxwYXRoIGZpbGwtcnVsZT0iZXZlbm9kZCIgY2xpcC1ydWxlPSJldmVub2RkIiBkPSJNMCAxQzAgMC40NDc3MTUgMC40NDc3MTUgMCAxIDBIOUM5LjU1MjI5IDAgMTAgMC40NDc3MTUgMTAgMUMxMCAxLjU1MjI4IDkuNTUyMjkgMiA5IDJIMUMwLjQ0NzcxNSAyIDAgMS41NTIyOCAwIDFaIiBmaWxsPSJ3aGl0ZSIvPgo8L3N2Zz4K'); animation: checkmarkIn 80ms cubic-bezier(0.65, 0, 0.35, 1) forwards 80ms; clip-path: none; }[aria-disabled='true']:is(.TreeViewRootUlStyles .TreeViewItemContent) { pointer-events: none; }[aria-disabled='true']:is(.TreeViewRootUlStyles .TreeViewItemContent) .TreeViewItemContentText { color: var(--control-fgColor-disabled); }[aria-disabled='true']:is(.TreeViewRootUlStyles .TreeViewItemContent) .TreeViewItemVisual { fill: var(--control-fgColor-disabled); /* stylelint-disable-next-line max-nesting-depth, selector-max-compound-selectors, selector-max-specificity */ }:is([aria-disabled='true']:is(.TreeViewRootUlStyles .TreeViewItemContent) .TreeViewItemVisual) svg { fill: var(--control-fgColor-disabled); }/* stylelint-disable-next-line max-nesting-depth */@media (hover: hover) { /* stylelint-disable-next-line max-nesting-depth, selector-max-specificity */ :is([aria-disabled='true']:is(.TreeViewRootUlStyles .TreeViewItemContent) .FormControl-checkbox):hover { cursor: not-allowed; } }@media (hover: hover) { /* stylelint-disable-next-line max-nesting-depth */ [aria-disabled='true']:is(.TreeViewRootUlStyles .TreeViewItemContent):hover { cursor: not-allowed; background-color: transparent; } }.TreeViewRootUlStyles .TreeViewItemContentText { color: var(--control-fgColor-rest); flex: 1 1 auto; width: 0; }.TreeViewRootUlStyles:where([data-truncate-text='true']) .TreeViewItemContentText { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }.TreeViewRootUlStyles:where([data-truncate-text='false']) .TreeViewItemContentText { /* stylelint-disable-next-line declaration-property-value-keyword-no-deprecated -- Copied from primer/react */ word-break: break-word; }.TreeViewRootUlStyles .TreeViewItemVisual { display: flex; /* The visual icons should appear vertically centered for single-line items, but remain at the top for items that wrap across more lines. */ height: var(--custom-line-height, 1.3rem); color: var(--fgColor-muted); align-items: center; }.TreeViewRootUlStyles .TreeViewItemLeadingAction { display: flex; color: var(--fgColor-muted); grid-area: leadingAction; }:is(.TreeViewRootUlStyles .TreeViewItemLeadingAction) > button { flex-shrink: 1; }.TreeViewRootUlStyles .TreeViewItemLevelLine { width: 100%; height: 100%; /* * On devices without hover, the nesting indicator lines * appear at all times. */ border-color: var(--borderColor-muted); border-right: var(--borderWidth-thin) solid; }/* * On devices with :hover support, the nesting indicator lines * fade in when the user mouses over the entire component, * or when there's focus inside the component. This makes * sure the component remains simple when not in use. */@media (hover: hover) { .TreeViewRootUlStyles .TreeViewItemLevelLine { border-color: transparent; } .TreeViewRootUlStyles:hover .TreeViewItemLevelLine,.TreeViewRootUlStyles:focus-within .TreeViewItemLevelLine { border-color: var(--borderColor-muted); } }.TreeViewRootUlStyles .TreeViewVisuallyHidden { position: absolute; width: 1px; height: 1px; padding: 0; /* stylelint-disable-next-line primer/spacing */ margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }.TreeViewSkeletonItemContainerStyle { display: flex; align-items: center; column-gap: 0.5rem; height: 2rem;}@media (pointer: coarse) {.TreeViewSkeletonItemContainerStyle { height: 2.75rem;} }.TreeViewSkeletonItemContainerStyle:nth-of-type(5n + 1) { --tree-item-loading-width: 67%; }.TreeViewSkeletonItemContainerStyle:nth-of-type(5n + 2) { --tree-item-loading-width: 47%; }.TreeViewSkeletonItemContainerStyle:nth-of-type(5n + 3) { --tree-item-loading-width: 73%; }.TreeViewSkeletonItemContainerStyle:nth-of-type(5n + 4) { --tree-item-loading-width: 64%; }.TreeViewSkeletonItemContainerStyle:nth-of-type(5n + 5) { --tree-item-loading-width: 50%; }.TreeItemSkeletonTextStyles { width: var(--tree-item-loading-width, 67%);}.TreeViewFailureMessage { display: grid; grid-template-columns: auto 1fr; gap: 0.5rem; width: 100%; align-items: center;}