serg1557733/currencyCalculator: working with API , fetch, promise and DOM @ b67999b9242b5f016ee90cb0ed61073c49cab4b8

working with API , fetch, promise and DOM

serg155alternate b67999b924 first commit		2 anni fa
index.html	b67999b924 first commit	2 anni fa
script.js	b67999b924 first commit	2 anni fa
style.css	b67999b924 first commit	2 anni fa