/**
 * Split a string into an array of strings using a separator
 */
export declare function getKeys(key: string, separator?: string): string[];
/**
 * Get a normalized key name from a key string (e.g. "shift+ctrl+alt+meta+a")
 */
export declare function normalizeKey(key: string, separator?: string): string;
/**
 * Split a string by a separator, but append the separator to the end of the string if it ends with the separator
 * E.g. "a+b+c+" will be split into ["a", "b", "c+"] instead of ["a", "b", "c"]
 */
export declare function safeSplit(value: string, separator: string): string[];
/**
 * Check if the event should be ignored or not based on the target element
 */
export declare function defaultInputFilter(event: KeyboardEvent): boolean;