export default class SquircleCanvas extends HTMLElement {
    static observedAttributes: string[];
    _radius: number;
    _fill: string;
    _borderWidth: number;
    _borderColor: string;
    _animationFrame: number;
    _width: number;
    _height: number;
    _shadow: ShadowRoot;
    /** @type {CanvasRenderingContext2D?} */
    _context: CanvasRenderingContext2D | null;
    connectedCallback(): void;
    /**
     * @param {string} name
     * @param {string} _
     * @param {string} newValue
     */
    attributeChangedCallback(name: string, _: string, newValue: string): void;
    _scheduleRedraw(): void;
    _draw(): void;
}