What is the meaning of the 'g' flag in regular expressions?

Question

What is the meaning of the g flag in regular expressions?

What is is the difference between /.+/g and /.+/?

Answer 1

There is no difference between /.+/g and /.+/ because they will both only ever match the whole string once. The g makes a difference if the regular expression could match more than once or contains groups, in which case .match() will return an array of the matches instead of an array of the groups.