/**
 * Call `toString()` on a value if it exists in its prototype, or return `''` otherwise.
 *
 * This assumes that anything implementing `.toString()` returns a string type.
 */
export declare const toStringOrEmptyString: (value: any) => string;
/**
 * Convert a string to title case.
 */
export declare const toTitleCase: (str: string) => string;
/**
 * Convert a string from pascal to camel case.
 */
export declare const pascalToCamelCase: (str: string) => string;
/**
 * Get the initials for each word in a string (capitalized).
 */
export declare const getInitials: (str: string) => string;
/**
 * Convert a number to it's ordinal version.
 */
export declare const toOrdinal: (n: number) => string;
/**
 * Filter falsy elements from an array, then join them. Default separator: `', '`.
 */
export declare const filterAndJoin: (parts: (string | false | null | undefined)[], separator?: string) => string;
/**
 * Remove the prefix of a base64 encoded data url (e. g. `data:image/jpeg;base64,`, `data:image/png;base64,`, `data:application/pdf;base64,`).
 */
export declare const removeDataUrlPrefix: (data: string) => string;
/**
 * Convert a size description into its amount of bytes (inspired by the `ms` package).
 *
 * `KiB`, `MiB`, `GiB` are IEC standard, `kB`, `MB`, `GB` are SI standard.
 * @see https://en.wikipedia.org/wiki/Kilobyte
 */
export declare const bytes: (input: string) => number;
/**
 * Format a number of bytes into a human-readable format.
 *
 * @see https://github.com/sindresorhus/pretty-bytes
 */
export declare const formatBytes: (n: number) => string;