declare class WebComponentBase extends HTMLElement {
    #private;
    [key: string]: any;
    /**
     * Schedule a repaint on the next animation frame, coalescing multiple
     * calls within the same frame into a single `paint()` invocation.
     * Subclasses that use canvas rendering should override `paint()`.
     */
    scheduleRepaint(): void;
    /**
     * Cheap array comparison: same length + same first/last element.
     * Catches the common case where the reconciler re-sets identical data
     * every frame, without a full deep-equality scan.
     *
     * @param key  Optional property key to compare on object arrays
     *             (e.g. "time" for CandleDataPoint[], "index" for markers).
     */
    arraysMatch<T>(a: T[], b: T[], key?: keyof T): boolean;
    static get observedAttributes(): string[];
    static defaultAttributeValue(_name: string): unknown;
    static parseAttributeValue(_name: string, value: string | null): unknown;
    constructor();
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(attr: string, _oldValue: string | null, newValue: string | null): void;
    emitEvent(name: string, detail: unknown): void;
    allAttributesChangedCallback(_attributes: Record<string, unknown>): void;
    connectElementWithEvent(elementId: string, eventStr: string, methodCallStr: string): void;
}
export { WebComponentBase as default, WebComponentBase };