export declare function drawTimeSeriesChart(canvas: HTMLCanvasElement, data: number[], options?: {
    color?: string;
    max?: number;
    fillGradient?: boolean;
}): void;
export declare function drawBarChart(canvas: HTMLCanvasElement, labels: string[], data: number[], options?: {
    color?: string;
}): void;
export declare function drawDonutChart(canvas: HTMLCanvasElement, labels: string[], data: number[], colors?: string[]): void;