js-levenshtein-esm/lib/index.d.ts

The most efficient JS implementation calculating the Levenshtein distance, i.e. the difference between two strings.

/**
 * Calculates the levenshtein distance between two strings
 *
 * @param {string} a First string
 * @param {string} b Second string
 * @return {number} Distance
 */
export default function levenshtein(a: string, b: string): number;