import { LitElement } from "lit";
/**
 * Tab panel component that holds content for individual tabs.
 *
 * Each tab panel should have a name that matches a corresponding tab.
 *
 * [Warp component reference](https://warp-ds.github.io/docs/components/tabs/frameworks/elements)
 *
 * @parent w-tabs
 */
export declare class WarpTabPanel extends LitElement {
    static styles: import("lit").CSSResult[];
    private _internals;
    constructor();
    /**
     * Required so `<w-tab>` has something to target.
     */
    id: string;
    /**
     * Whether this panel is active (visible).
     * Set by parent w-tabs via the _parentActive property.
     *
     * @internal
     */
    set active(value: boolean);
    /** @internal */
    get active(): boolean;
    private _ownActive;
    /**
     * Internal active state managed by parent w-tabs.
     * Non-reflecting to avoid DOM changes during hydration.
     * @internal
     */
    _parentActive: boolean | undefined;
    /**
     * Internal aria-labelledby managed by parent w-tabs.
     * Non-reflecting to avoid DOM changes during hydration.
     * @internal
     */
    _parentAriaLabelledBy: string | undefined;
    connectedCallback(): void;
    updated(): void;
    private syncA11yState;
    render(): import("lit").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        "w-tab-panel": WarpTabPanel;
    }
}