@sandlada/mdc/build/components/tabs/internal/base-tabs.d.ts

@sandlada/mdc is an open source component library that follows the Material Design 3 design specifications.

/**
 * @license
 * Copyright 2026 Kai-Orion & Sandlada
 * SPDX-License-Identifier: MIT
 *
 * @fileoverview
 * Internal base class for `mdc-tabs`.
 *
 * The bar owns selection: a single active tab at a time (roving `tabindex`),
 * an ARIA `tablist` role, arrow-key navigation and a cancelable `change` event
 * that fires before the selection is committed. Each tab is asked to animate
 * its indicator (via the {@link ANIMATE_INDICATOR} symbol) from the previous
 * tab's position, so the active indicator slides smoothly between tabs.
 */
import { LitElement, type PropertyValues, type TemplateResult } from 'lit';
import { BaseTab } from './base-tab';
import type { ITabs } from '../tabs.interface';
export declare abstract class BaseTabs extends LitElement implements ITabs {
    /** The index of the active tab. */
    activeTabIndex: number;
    /** If `true` (default), arrow keys immediately activate the focused tab. */
    autoActivate: boolean;
    protected readonly tabsElement: HTMLElement | null;
    private readonly assignedTabs;
    private tabs;
    constructor();
    /** The currently selected tab. */
    get activeTab(): BaseTab | null;
    protected render(): TemplateResult;
    protected updated(changedProperties: PropertyValues<this>): void;
    private readonly handleTabClick;
    private activateTabAfterMicrotask;
    private readonly handleKeydown;
    private isRtl;
    private readonly handleSlotChange;
    /**
     * Selects `tab`, animating the indicator from the previously active tab.
     *
     * Dispatches a cancelable `change` event first; if a listener cancels it,
     * the previous selection is restored.
     */
    activateTab(tab: BaseTab, userInitiated: boolean): Promise<void>;
    /**
     * Scrolls the given tab (defaults to the active tab) into view within the
     * tab bar. Resolves once the native smooth scroll has been requested.
     */
    scrollToTab(tabToScrollTo?: BaseTab | null): Promise<void>;
}
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