Trying to replace specific spaces with dashes and lowercase the string
e.g.
"1.0 Domain - sub & domain"
"1.0-Domain-sub&domain"
Tried
str.replace(/\s+/g, '-').toLowerCase();
-> 1.0-domain---sub-&-domain
You could capture either - or & between optional whitespace chars and replace that with only the captured char, or else match 1 or more whitespace chars to be replaced with an empty string using the replacer function.
let str = "1.0 Domain - sub & domain";
str = str.replace(/\s*([&-])\s*|\s+/g, (m, g1) => g1 ? g1 : '-').toLowerCase();
console.log(str)