HoopsTabsElement

class ui.tabs.HoopsTabsElement()

A tab container component that manages multiple tab panels.

This component provides a tabbed interface where users can switch between different content panels. It handles keyboard navigation, ARIA attributes, and tab selection state management.

Key features:

  • Automatic tab panel management via slotted hoops-tab elements
  • Keyboard navigation with arrow keys (Left/Right for horizontal, Up/Down for vertical)
  • Home and End key support for first/last tab navigation
  • ARIA-compliant accessibility with proper roles and attributes
  • Customizable tab positioning (top, bottom, left, right)
  • CSS custom properties for theming
  • Support for disabled tabs
  • Selection by index or by value

Constructors

ui.tabs.HoopsTabsElement.constructor()
HoopsTabsElement(): HoopsTabsElement

Returns: HoopsTabsElement

Properties

ui.tabs.HoopsTabsElement.position
position: (“left” | “right” | “top” | “bottom”)

Position of the tab headers relative to the content.

ui.tabs.HoopsTabsElement.selectedIndex
selectedIndex: number

The index of the currently selected tab.

Methods

ui.tabs.HoopsTabsElement.connectedCallback()
connectedCallback(): void

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().

Returns: void

ui.tabs.HoopsTabsElement.selectByValue()
selectByValue(value: string): void

Selects a tab by its value property.

Parameters

value: string

The value of the tab to select

Returns: void

ui.tabs.HoopsTabsElement.willUpdate()
willUpdate(changedProperties: (PropertyValueMap | Map)): void

Invoked before update() to compute values needed during the update.

Implement willUpdate to compute property values that depend on other properties and are used in the rest of the update process.

willUpdate(changedProperties) {
  // only need to check changed properties for an expensive computation.
  if (changedProperties.has('firstName') || changedProperties.has('lastName')) {
    this.sha = computeSHA(`${this.firstName} ${this.lastName}`);
  }
}

render() {
  return html`SHA: ${this.sha}`;
}

Parameters

changedProperties: (PropertyValueMap | Map)

Returns: void