Regex To Match A Username With No Consecutive Spaces

I am struggling to make a javascript regex to satisfy the following: The first character has to be alphabetical ([a-zA-Z]) The rest can be any letters, any numbers, hyphen, dot,

Solution 1:

This should work for you:

/^[a-z](?!.* {2})[ \w.-]{2,24}$/gmi

RegEx Demo