On this snippet, we’re converting the hex string "1A3F" to its decimal equal, 6719. The parseInt perform normally takes two arguments: the string to parse along with the radix, that's 16 for hexadecimal. For now it is a BYOK implmentation meaning you have to supply your own API Key − https://zozodirectory.com/listings13259757/%EC%9D%B8%EA%B3%84%EB%8F%99-%EC%85%94%EC%B8%A0%EB%A3%B8-an-overview