Marks the item as the tree's active item.
Get/Set whether the tree item is disabled. Disabled items are ignored for user interactions.
The tree item expansion state.
The tree item label.
The depth of the item, relative to the root.
To be used for load-on-demand scenarios in order to specify whether the item is loading data.
The parent item of the current tree item (if any)
The tree item selection state.
OptionaltreeA reference to the tree the item is a part of.
The value entry that the tree item is visualizing. Required for searching through items.
The full path to the tree item, starting from the top-most ancestor.
Collapses the tree item.
Expands the tree item.
Returns a collection of child items. If the parameter value is true returns all tree item's direct children, otherwise - only the direct children.
Toggles tree item expansion state.
Invoked when the component is added to the document's DOM.
In connectedCallback() you should setup tasks that should only occur when
the element is connected to the document. The most common of these is
adding event listeners to nodes external to the element, like a keydown
event handler added to the window.
connectedCallback() {
super.connectedCallback();
addEventListener('keydown', this._handleKeydown);
}
Typically, anything done in connectedCallback() should be undone when the
element is disconnected, in disconnectedCallback().
Invoked when the component is removed from the document's DOM.
This callback is the main signal to the element that it may no longer be
used. disconnectedCallback() should ensure that nothing is holding a
reference to the element (such as event listeners added to nodes external
to the element), so that it is free to be garbage collected.
disconnectedCallback() {
super.disconnectedCallback();
window.removeEventListener('keydown', this._handleKeydown);
}
An element may be re-connected after being disconnected.
StaticstylesArray of styles to apply to the element. The styles should be defined using the css tag function, via constructible stylesheets, or imported from native CSS module scripts.
Note on Content Security Policy:
Element styles are implemented with <style> tags when the browser doesn't
support adopted StyleSheets. To use such <style> tags with the style-src
CSP directive, the style-src value must either include 'unsafe-inline' or
nonce-<base64-value> with <base64-value> replaced be a server-generated
nonce.
To provide a nonce to use on generated <style> elements, set
window.litNonce to a server-generated nonce in your page's HTML, before
loading application code:
<script>
// Generated and unique per request:
window.litNonce = 'a1b2c3d4';
</script>
The tree-item component represents a child item of the tree component or another tree item.
Element
igc-tree-item
Slot
Slot
label - Renders the tree item container.
Slot
indicator - Renders the expand indicator container.
Slot
loading - Renders the tree item loading indicator container.
Slot
indentation - Renders the container (by default the space) before the tree item.
Csspart
wrapper - The wrapper for the tree item.
Csspart
selected - Indicates selected state. Applies to
wrapper.Csspart
focused - Indicates focused state. Applies to
wrapper.Csspart
active - Indicates an active state. Applies to
wrapper.Csspart
indicator - The expand indicator of the tree item.
Csspart
label - The tree item content.
Csspart
text - The tree item displayed text.
Csspart
select - The checkbox of the tree item when selection is enabled.