/**
 * This code was derived from https://github.com/sindresorhus/pretty-bytes/tree/71d686a4cefb314c13b57107de5add5789753900.
 * It is available under the MIT license.
 */
/**
 * Options for the `formatBytes` function.
 */
export interface FormatBytesOptions {
    /**
     * Include plus sign for positive numbers. If the difference is exactly zero a space character will be prepended instead for better alignment.
     */
    signed?: boolean;
    /**
     * - If `false`: Output won't be localized.
     * - If `true`: Localize the output using the system/browser locale.
     * - If `string`: Expects a [BCP 47 language tag](https://en.wikipedia.org/wiki/IETF_language_tag) (For example: `en`, `de`, …)
     * - If `string[]`: Expects a list of [BCP 47 language tags](https://en.wikipedia.org/wiki/IETF_language_tag) (For example: `en`, `de`, …)
     */
    locale?: boolean | string | ReadonlyArray<string>;
    /**
     * Format the number as [bits](https://en.wikipedia.org/wiki/Bit) instead of [bytes](https://en.wikipedia.org/wiki/Byte). This can be useful when, for example, referring to [bit rate](https://en.wikipedia.org/wiki/Bit_rate).
     * @example
     * ```
     * import formatBytes from '@oliversalzburg/js-utils/format/bytes.js';
     *
     * formatBytes(1337, {bits: true});
     * //=> '1.34 kbit'
     * ```
     */
    bits?: boolean;
    /**
     * Format the number using the [Binary Prefix](https://en.wikipedia.org/wiki/Binary_prefix) instead of the [SI Prefix](https://en.wikipedia.org/wiki/SI_prefix). This can be useful for presenting memory amounts. However, this should not be used for presenting file sizes.
     * @example
     * ```
     * import formatBytes from '@oliversalzburg/js-utils/format/bytes.js';
     *
     * formatBytes(1000, {binary: true});
     * //=> '1000 bit'
     *
     * formatBytes(1024, {binary: true});
     * //=> '1 kiB'
     * ```
     */
    binary?: boolean;
    /**
     * The minimum number of fraction digits to display.
     *
     * If neither `minimumFractionDigits` or `maximumFractionDigits` are set, the default behavior is to round to 3 significant digits.
     * @example
     * ```
     * import formatBytes from '@oliversalzburg/js-utils/format/bytes.js';
     *
     * // Show the number with at least 3 fractional digits
     * formatBytes(1900, {minimumFractionDigits: 3});
     * //=> '1.900 kB'
     *
     * formatBytes(1900);
     * //=> '1.9 kB'
     * ```
     */
    minimumFractionDigits?: number;
    /**
     * The maximum number of fraction digits to display.
     *
     * If neither `minimumFractionDigits` or `maximumFractionDigits` are set, the default behavior is to round to 3 significant digits.
     * @example
     * ```
     * import formatBytes from '@oliversalzburg/js-utils/format/bytes.js';
     *
     * // Show the number with at most 1 fractional digit
     * formatBytes(1920, {maximumFractionDigits: 1});
     * //=> '1.9 kB'
     *
     * formatBytes(1920);
     * //=> '1.92 kB'
     * ```
     */
    maximumFractionDigits?: number;
    /**
     * Put a space between the number and unit.
     * @example
     * ```
     * import formatBytes from '@oliversalzburg/js-utils/format/bytes.js';
     *
     * formatBytes(1920, {space: false});
     * //=> '1.9kB'
     *
     * formatBytes(1920);
     * //=> '1.92 kB'
     * ```
     */
    space?: boolean;
}
/**
 * Convert bytes to a human readable string: `1337` → `1.34 kB`.
 * @param number - The number to format.
 * @param options - The options for formatting the number.
 * @returns The formatted string.
 * @example
 * ```
 * import formatBytes from '@oliversalzburg/js-utils/format/bytes.js';
 *
 * formatBytes(1337);
 * //=> '1.34 kB'
 *
 * formatBytes(100);
 * //=> '100 B'
 *
 * // Display file size differences
 * formatBytes(42, {signed: true});
 * //=> '+42 B'
 *
 * // Localized output using German locale
 * formatBytes(1337, {locale: 'de'});
 * //=> '1,34 kB'
 * ```
 */
export declare const formatBytes: (number: number, options?: Readonly<FormatBytesOptions>) => string;