/** Viewport taken from https://github.com/puppeteer/puppeteer/blob/main/docs/api/puppeteer.viewport.md */
interface Viewport {
    /**
     * The page width in pixels.
     */
    width: number;
    /**
     * The page height in pixels.
     */
    height: number;
    /**
     * Specify device scale factor.
     * See {@link https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio | devicePixelRatio} for more info.
     * @defaultValue 1
     */
    deviceScaleFactor?: number;
    /**
     * Whether the `meta viewport` tag is taken into account.
     * @defaultValue false
     */
    isMobile?: boolean;
    /**
     * Specifies if the viewport is in landscape mode.
     * @defaultValue false
     */
    isLandscape?: boolean;
    /**
     * Specify if the viewport supports touch events.
     * @defaultValue false
     */
    hasTouch?: boolean;
}
declare class Chromium {
    /**
     * Downloads or symlinks a custom font and returns its basename, patching the environment so that Chromium can find it.
     * If not running on AWS Lambda nor Google Cloud Functions, `null` is returned instead.
     */
    static font(input: string): Promise<string>;
    /**
     * Returns a list of additional Chromium flags recommended for serverless environments.
     * The canonical list of flags can be found on https://peter.sh/experiments/chromium-command-line-switches/.
     */
    static get args(): string[];
    /**
     * Returns sensible default viewport settings.
     */
    static get defaultViewport(): Required<Viewport>;
    /**
     * Inflates the current version of Chromium and returns the path to the binary.
     * If not running on AWS Lambda nor Google Cloud Functions, `null` is returned instead.
     */
    static executablePath(input?: string): Promise<string>;
    /**
     * Returns a boolean indicating if we are running on AWS Lambda or Google Cloud Functions.
     * True is returned if the NODE_ENV is set to 'test' for easier integration testing.
     * False is returned if Serverless environment variables `IS_LOCAL` or `IS_OFFLINE` are set.
     */
    static get headless(): boolean;
}
export = Chromium;