import type Time from './Time';
import type Chart from './Chart/Chart';
/**
 * Provide error messages for debugging, with links to online explanation. This
 * function can be overridden to provide custom error handling.
 *
 * @sample highcharts/chart/highcharts-error/
 *         Custom error handler
 *
 * @function Highcharts.error
 *
 * @param {number|string} code
 *        The error code. See
 *        [errors.xml](https://github.com/highcharts/highcharts/blob/master/errors/errors.xml)
 *        for available codes. If it is a string, the error message is printed
 *        directly in the console.
 *
 * @param {boolean} [stop=false]
 *        Whether to throw an error or just log a warning in the console.
 *
 * @param {Highcharts.Chart} [chart]
 *        Reference to the chart that causes the error. Used in 'debugger'
 *        module to display errors directly on the chart.
 *        Important note: This argument is undefined for errors that lack
 *        access to the Chart instance. In such case, the error will be
 *        displayed on the last created chart.
 *
 * @param {Highcharts.Dictionary<string>} [params]
 *        Additional parameters for the generated message.
 *
 * @return {void}
 */
export declare function error(code: (number | string), stop?: boolean, chart?: Chart, params?: Record<string, string>): void;
export declare namespace error {
    const messages: Array<string>;
}
/**
 * The time unit lookup
 *
 * @ignore
 */
export declare const timeUnits: Record<Time.TimeUnit, number>;
/**
 * Get a unique key for using in internal element id's and pointers. The key is
 * composed of a random hash specific to this Highcharts instance, and a
 * counter.
 *
 * @example
 * let id = uniqueKey(); // => 'highcharts-x45f6hp-0'
 *
 * @function Highcharts.uniqueKey
 *
 * @return {string}
 * A unique key.
 */
export declare const uniqueKey: () => string;
/**
 * Activates a serial mode for element IDs provided by
 * {@link Highcharts.uniqueKey}. This mode can be used in automated tests, where
 * a simple comparison of two rendered SVG graphics is needed.
 *
 * **Note:** This is only for testing purposes and will break functionality in
 * webpages with multiple charts.
 *
 * @example
 * if (
 *   process &&
 *   process.env.NODE_ENV === 'development'
 * ) {
 *   Highcharts.useSerialIds(true);
 * }
 *
 * @function Highcharts.useSerialIds
 *
 * @param {boolean} [mode]
 * Changes the state of serial mode.
 *
 * @return {boolean|undefined}
 * State of the serial mode.
 */
export declare function useSerialIds(mode?: boolean): (boolean | undefined);
export interface ErrorMessageEventObject {
    /**
     * The chart that causes the error.
     */
    chart?: Chart;
    /**
     * The error code.
     */
    code: number;
    /**
     * The error message.
     */
    message?: string;
    /**
     * Additional parameters for the generated message.
     */
    params?: Record<string, string>;
}