Tree

Hierarchical navigation with explicit expansion and one roving tab stop.

stable · light DOM · 4.0.0. Light DOM retains static content, native semantics, label relationships and host composition without duplicating controls.

Standalone example ↗Copy file manifest Canonical JSON Vue gallery ↗Prepare an agent kit →

Live variants

default

Source
- App.vue
- styles.css
README.md

Markup

<j3w1-tree id="example-tree-default"><ul class="tree" role="tree" aria-label="Workspace files"><li role="treeitem" id="example-tree-default-tree-source" aria-expanded="true" tabindex="0" data-demo-focus-target=""><span data-tree-label="">Source<button type="button" tabindex="-1" data-tree-toggle="" aria-label="Toggle children">▸</button></span><ul role="group"><li role="treeitem" id="example-tree-default-tree-app" tabindex="-1" aria-selected="true"><span data-tree-label="">App.vue</span></li><li role="treeitem" id="example-tree-default-tree-styles" tabindex="-1" aria-selected="false"><span data-tree-label="">styles.css</span></li></ul></li><li role="treeitem" id="example-tree-default-tree-readme" tabindex="-1" aria-selected="false"><span data-tree-label="">README.md</span></li></ul></j3w1-tree>

Install and register

Use the exact version. If npm publication is pending, install the release tarball from the installation guide.

npm install --save-exact @j3w1/ui@4.0.0

import '@j3w1/ui/tokens.css';
import '@j3w1/ui/styles/tree.css';
import '@j3w1/ui/register/tree';

Insert the maintained markup above after loading these imports. Its native children provide accessible names and form behavior; the empty custom tag alone does not create a control.

Vue SFC, React, Astro and plain HTML integration →

Copy the complete implementation

npx --package=@j3w1/ui@4.0.0 j3w1-ui copy tree --out ./vendor/j3w1/tree

The CLI verifies every file before writing and refuses overwrites. Serve the output over HTTP and open index.html. Keep its modules, CSS, tokens and licence notices together.

Public API

attributes

Name	Type / signature	Meaning
`disabled`	`CustomEvent`	Disable the native controls owned by this instance.
`loading`	`CustomEvent`	Mark the primary control busy and prevent duplicate activation.

properties

Name	Type / signature	Meaning
`disabled`	`boolean`	Delegates disabled state to native children.
`name`	`string`	Native control name; application form keys remain explicit.
`selectedId`	`string`	Selected treeitem ID.

methods

Name	Type / signature	Meaning
`refresh`	`(): void`	Reconnect behavior after replacing native child structure.
`focus`	`(options?: FocusOptions): void`	Focus the first usable native control.
`expand`	`(id: string, expanded?: boolean): void`	Expand or collapse a parent by ID.

events

Name	Type / signature	Meaning
`j3w1-select`	`CustomEvent`	The user selected a visible enabled item.
`j3w1-toggle`	`CustomEvent`	A parent expanded or collapsed.

Dependencies and verification

Registered components: none. Style dependencies: none.

Package presence establishes an available implementation. Actual passes depend on the tested artifact and environment. Read specification execution evidence; read packed-consumer evidence; inspect the complete state matrix.

Full implementation manifest, API and token dependency closure

Canonical specification

Specimen density

Specimen profile

Tree `tree`

Family: Navigation
Maturity: stable
Priority: R2
Since: 1.0.0
Custom widget: treeview — APG pattern
specified
demonstrated

Hierarchical navigation with explicit expansion and one roving tab stop.

Report an issue with this component

Tokens

Focus a role to inspect its values; follow its link for persistent usage and source details.

Part	Role	Value	Use
`root.bg`	`color.surface.default`approveduse	`#0d0707`	D-041 surface.default: color.primitive.modern.panel.
`root.text`	`color.text.default`approveduse	`#e99499`	D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills.
`root.border`	`color.border.control`approveduse	`#c81a1a`	D-041 owner correction: red control and floating-frame borders, distinct from rose text.
`heading.text`	`color.text.bright`approveduse	`#ffa2a7`	D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills.
`secondary.text`	`color.text.muted`approveduse	`#d4868b`	D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills.
`control.bg`	`color.surface.input`approveduse	`#000000`	Form-control fill.
`control.focus`	`color.interaction.focus.ring`observeduse	`#e53935`	1px dashed focus ring on controls and rows.
`dependency.role-border-width-default`	`border.width.default`observeduse	`1px`	Every border is 1px.
`dependency.role-border-width-emphasis`	`border.width.emphasis`observeduse	`2px`	Selected indicator, sticky header rule, invalid border.
`dependency.role-color-border-selected-indicator`	`color.border.selected-indicator`observeduse	`#e53935`	2px indicator bar on the selected tab or nav item.
`dependency.role-color-interaction-selection-bg`	`color.interaction.selection.bg`approveduse	`#531310`	Selected row, tab, workspace; D-027 recessed the fill, leaving the 2px indicator and the check to carry selection.
`dependency.role-color-interaction-selection-text`	`color.interaction.selection.text`observeduse	`#f4eeee`	Text on the selection.
`dependency.role-color-text-disabled`	`color.text.disabled`approveduse	`#a3676b`	D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills.
`dependency.role-density-comfortable-control-height`	`density.comfortable.control-height`observeduse	`32px`
`dependency.role-density-compact-control-height`	`density.compact.control-height`observeduse	`24px`
`dependency.role-focus-offset`	`focus.offset`observeduse	`-2px`	outline-offset for controls.
`dependency.role-radius-none`	`radius.none`observeduse	`0px`	The only radius. Nothing is rounded.
`dependency.role-space-12`	`space.12`observeduse	`12px`
`dependency.role-space-16`	`space.16`observeduse	`16px`
`dependency.role-space-8`	`space.8`observeduse	`8px`

State matrix

Every declared state and combination, statically rendered; the default cell is live. Sizes: compact, comfortable (switch with the density control above).

State	Default
`default`	Source App.vue styles.css README.md
`selected`
`expanded`
`collapsed`
`focus-visible`
`disabled`

Purpose

Navigates a hierarchy; selection and expansion are separate actions.

Anatomy

Parts as listed in the anatomy.

States

State	Visual	Non-colour channel
default	Visible named tree items.	Tree and group hierarchy.
selected	Selected fill, text and start indicator.	aria-selected.
expanded	Downward marker and visible children.	aria-expanded=true.
collapsed	Side marker and hidden children.	aria-expanded=false; children leave focus order.
focus-visible	Dashed ring on the item’s own label.	Roving native focus.
disabled	Disabled text at full opacity.	aria-disabled blocks selection.

Keyboard

As in the key table; only one visible item has tabindex=0.

Accessibility

Labels exclude descendant text. Collapsing a parent of the focused item moves focus to that parent.

Portability

Follows the shared component defaults in spec/portability.md (section “Shared component defaults”).

Non-examples

Unlabelled controls, color-only status, drag-only operations, hidden required instructions, stolen focus or an invented service success.

Contrast report

5 declared pairs measured on resolved sRGB values with the WCAG 2.x formula; 0 waived (decorative only), 0 failing. A pass is a design target for the named role, not an application-wide conformance claim.

Pair	State	Kind	Foreground	Background	Ratio	Min	Result
tree default text	default	text	`color.text.default` `#e99499`	`color.surface.default` `#0d0707`	8.72	4.5	pass
tree default border	default	ui	`color.border.control` `#c81a1a`	`color.surface.default` `#0d0707`	3.44	3	pass
Primary content	—	text	`color.text.default` `#e99499`	`color.surface.default` `#0d0707`	8.72	4.5	pass
Supporting content	—	text	`color.text.muted` `#d4868b`	`color.surface.default` `#0d0707`	7.22	4.5	pass
Control boundary	—	ui	`color.border.control` `#c81a1a`	`color.surface.default` `#0d0707`	3.44	3	pass

Keys

Key	Action
`Up / Down / Home / End`	Move through visible items in source order.
`Right / Left`	Expand or enter a parent, collapse it or return to its parent. Mirror these keys in RTL.
`Enter / Space`	Select the focused enabled item.
`Typing`	Move to the next visible label starting with the character.

For agents

Component JSON ·Implementation brief ·Build a task kit ·

Stress fixtures: FX-320 FX-360 FX-ZOOM-200 FX-I18N FX-RTL FX-RM FX-HC FX-TOUCH FX-DENSITY FX-STATE-MATRIX

j3w1 / theme

j3w1 / command

Tree

Live variants

default

Install and register

Copy the complete implementation

Public API

attributes

properties

methods

events

Dependencies and verification

Canonical specification

Tree `tree`

Tokens

State matrix

Purpose

Anatomy

States

Keyboard

Accessibility

Portability

Non-examples

Contrast report

Keys

For agents

Live variants

default

Install and register

Copy the complete implementation

Public API

attributes

properties

methods

events

Dependencies and verification

Canonical specification

Tree tree

Tokens

State matrix

Purpose

Anatomy

States

Keyboard

Accessibility

Portability

Non-examples

Contrast report

Keys

For agents

Tree `tree`