03_normalizedLevenshtein.js

const levenshtein = require("js-levenshtein")
const normalizedLevenshtein = (a, b) => levenshtein(a, b) / Math.max(a.length, b.length)

console.log(normalizedLevenshtein("headphones", "headph0nes"))
// 0.1

console.log(normalizedLevenshtein("לימון", "לימונים"))
// 0.42857142857142855