javascript - Regex for email matching

Question

I am using this regex to match email addresses in a string.

Everything works fine here: http://regexr.com?31e5a with this regex:

([w-.]+)@((?:[w]+.)+)([a-zA-Z]{2,4})

But when I am trying to use it with javascript, I am getting only the first email address, not all of them.

Here is my code:

var emailsString = '[email protected] xxxxxxx [email protected]';
var emails = emailsString.match(/([w-.]+)@((?:[w]+.)+)([a-zA-Z]{2,4})/)[0];

Ad here, I am getting only the first email.

If you can help me, thank you.

Answer 1

You need to add a 'g' modifier:

var emailsString = '[email protected] xxxxxxx [email protected]';## Heading ##
var emails = emailsString.match(/([w-.]+)@((?:[w]+.)+)([a-zA-Z]{2,4})/g)

Also, as mentioned elsewhere in this post, your regex does not match all valid emails. Matching valid emails with regex is actually a pretty difficult problem, but to start with, the TLD component can be longer than 4 characters so you should adjust that accordingly.

My recommendation is to use the other regex mentioned here in combination with the /g modifier to get all matches.

The g modifier is used to perform a global match (find all matches rather than stopping after the first match).