/// <reference types="node" />
import { MugshotSelector } from '../lib/mugshot';
export interface ScreenshotOptions {
    /**
     * All elements identified by this selector will be covered with {@link ignoreColor}
     * before taking the screenshot.
     */
    ignore?: MugshotSelector;
    /**
     * The color used to covered elements matched by the {@link ignore} selector.
     *
     * @example
     * #ff0000 // 6 hex char notation
     *
     * @example
     * #ccc // 3 hex char notation
     *
     * @default #000
     */
    ignoreColor?: string;
}
/**
 * Thrown when the selector passed to {@link check|Mugshot.check} matches more than one
 * element.
 */
export declare class TooManyElementsError extends Error {
    constructor(selector: MugshotSelector);
}
export interface Screenshotter {
    /**
     * Take a viewport screenshot.
     */
    takeScreenshot(options?: ScreenshotOptions): Promise<Buffer>;
    /**
     * Take a screenshot of a single element.
     *
     * Will throw {@link TooManyElementsError} if `selector` matches more than one element.
     */
    takeScreenshot(selector: MugshotSelector, options?: ScreenshotOptions): Promise<Buffer>;
}