import { HelperErrorTextType } from '../components/HelperErrorText/HelperErrorText';
import { TemplateVariant } from '../components/Template/Template';
import { AriaAttributes } from './interfaces';
/**
 * range
 * Get an array of values from `start` to `stop` - 1 with an optional
 * `step` between values.
 */
export declare const range: ({ start, stop, step, }: {
    start: number;
    stop: number;
    step?: number;
}) => number[];
/**
 * Given a pagination's pageCount, this will return (1) a page number,
 * derived from the current URL, and (2) a function that, when passed to
 * Pagination component, makes the URL change and refreshes the page.
 * @NOTE this is only used for Storybook documentation.
 */
export declare const getStorybookHrefProps: (pageCount: number) => {
    computedCurrentPage: number;
    getPageHref: (selectedPage: number) => string;
};
interface GetAriaAttrsProps {
    additionalAriaLabel?: string;
    footnote: HelperErrorTextType;
    id: string;
    labelText: HelperErrorTextType;
    name: string;
    additionalHelperTextIds?: string;
    showLabel: boolean;
}
/**
 * Get aria-* attributes for input components. This sets the `aria-label` and
 * `aria-describedby` attributes, based on the label and footnote values.
 */
export declare const getAriaAttrs: ({ additionalAriaLabel, footnote, id, labelText, name, additionalHelperTextIds, showLabel, }: GetAriaAttrsProps) => AriaAttributes;
/** Convert a hex color value to an rgb or rgba value */
export declare const hexToRGB: (hex: string, alpha: number) => string;
/** Calculate color luminance */
export declare const colorLuminance: (r: any, g: any, b: any) => number;
/** Calculate color contrast ratio */
export declare const contrastRatio: (hex1: string, hex2: string) => string;
/** This method will truncate text by centain length. Default length is 60. */
export declare const truncateText: (text: string, truncateTextLength?: number) => string;
/** Prepare a string for use in an ID or class attribute */
export declare const sanitizeStringForAttribute: (str: string) => string;
/** Sanitize any string */
export declare const sanitizeString: (str: string) => string;
/** Provides a random image to use as a placeholder. */
export type GetPlaceholderImageProps = "smaller" | "default";
export declare const getPlaceholderImage: (size?: GetPlaceholderImageProps, index?: number) => string;
/** Creates the correct sidebar label in Template stories or tests */
export declare const sidebarLabel: (variant: TemplateVariant) => string;
/** The default styles for images added as examples within doc pages. */
export declare const exampleWrapperStyles: {
    bgColor: string;
    borderRadius: string;
    display: string;
    justifyContent: string;
    mb: string;
    overflow: string;
    width: string;
};
/** Return just the text from within a JSX.Element */
export declare const getTextFromElement: (elem: React.ReactElement | string) => string;
export {};