regex - Get Substring between two characters using javascript

Question

I am trying to extract a string from within a larger string where it get everything inbetween a : and a ;

Current

Str = 'MyLongString:StringIWant;'

Desired Output

newStr = 'StringIWant'

Answer 1

You can try this

var mySubString = str.substring(
    str.indexOf(":") + 1, 
    str.lastIndexOf(";")
);