import type { ChartConfig, ChartData, ChartOptions, ChartType } from './types';
/**
 * Chart.js-compatible adapter rendering to HTML5 Canvas.
 *
 * Supports the dashboard subset: line / bar / doughnut / pie, with
 * responsive sizing, scales (beginAtZero / stacked / grid / ticks /
 * y1 dual-axis), legends, and tooltip callbacks. Advanced features
 * (radar, animations, plugins) are no-ops rather than crashes.
 */
export declare class Chart {
  static instances: WeakMap<HTMLCanvasElement, Chart>;
  static register(..._items: unknown[]): void;
  type: ChartType;
  data: ChartData;
  options: ChartOptions;
  canvas: HTMLCanvasElement;
  ctx: CanvasRenderingContext2D;
  constructor(target: HTMLCanvasElement | CanvasRenderingContext2D, config: ChartConfig);
  update(): void;
  resize(): void;
  destroy(): void;
}