Javascript URL validation regex

Question

I had the following url validation regex:

/(ftp|https?)://[^ \"]+$/

This is from the ref: Regular expression for URL validation (in JavaScript)

This

Answer 1

I built this regex IP and DNS validation for javascript.

/^(http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/)?((([a-z0-9])*[:]){1}|(([a-z0-9])*[.]){1}|(([0-9]){1,3}([.]|[:])){3}(([0-9]){1,3}[:]){1})([a-z]{2,5}|[0-9]{1,5})([.]([a-z0-9]){1,3})?(\/.*)?$/