JS string comparison?

Question

JavaScript

const str1 = 'Регулярные выражения'
const str2 = 'Регулярные выржения'

The letter a is missing in the second constant. You need to compare 2 strings if they differ by 1.2 characters true more than false

UPD: ready-made algorithms

Answer 1

https://ru.wikipedia.org/wiki/Levenshtein_distance