export declare function escapeRegExp(str: string): string;
export declare function formatDateTime(time?: number | string): string | undefined;
export declare function getDuration(start?: number | string, end?: number | string): string;
export declare function getPageFont(): string;
/**
 * 计算文本的行数
 * @param text 文本
 * @param font 字体大小
 * @param containerWidth 容器宽度
 * @param ctx 上下文可选
 * @returns
 */
export declare function getTextLineCount(text: string, font: number, containerWidth: number, ctx?: CanvasRenderingContext2D | null): {
    lineCount: number;
    breakIndex: number[];
};
export declare function getTextWidth(text: number | string, font: number): number;
export declare function highlightText(text: string, item: string): string;
/**
 * 判断是否是number
 * @param str
 * @returns
 */
export declare function isNumberString(str: number | string): boolean;
export declare function parseLogColor(log?: string): import("./constants").LevelColor | undefined;