/**
 * The purpose of this class is to help make the SharePoint framework errors more robust.
 * On top of the base Error class functionality, this class adds the concept of error codes.
 * The error code could be a non-localized immutable string or an error number. All the
 * SharePoint framework code is expected to use this class for raising errors.
 *
 * References:
 *
 * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error}
 *
 * {@link http://stackoverflow.com/questions/1382107/whats-a-good-way-to-extend-error-in-javascript}
 *
 * @alpha
 */
export default class SPError extends Error {
    /**
     * Inner error.
     */
    innerError: Error | undefined;
    /**
     * Error id.
     * e.g. Value of the enum.
     */
    get id(): number;
    /**
     * Error category.
     */
    get category(): string;
    private _errorCode;
    private _errorString;
    private _logProperties;
    private static _generateErrorStackForIE;
    /**
     * Constructor for the SPError class.
     *
     * @param errorCode - a numeric or string error code.
     * @param message - detailed error message.
     * @param logProperties - (optional) additional data that can be used to troubleshoot rare to repro bugs.
     *
     */
    constructor(errorCode: string, message: string, logProperties?: {
        [key: string]: any;
    });
    /**
     * Return a string equivalent of the error for display purposes.
     *
     * @returns string representation of the error.
     */
    toStringForUI(): string;
    /**
     * Return a string equivalent of the error for logging purposes.
     *
     * @returns string representation of the error.
     */
    toString(): string;
    /**
     * Return a string equivalent of the error for logging or display purposes.
     *
     * @returns string representation of the error.
     */
    _toString(logDebug?: boolean): string;
}
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