Parsing string to find email within string via Google Apps Script

While there are numerous solutions to this on SO already, the ones I've found need tweaking to provide the simplicity you're looking for.

• How to find out emails and names out of a string in javascript
• Regex for email matching
• Use javascript to find email address in a string
• Get all email addresses in a string with JavaScript
• Many more...

Here's a simple function condensed from all those other answers - the regular expression is a bit of overkill, actually, but can also be used to validate in many cases. It returns an array of addresses, so if you only want the first one, you would code email = findEmails(string)[0]... but really, you should do some error checking before trusting that.

/**
 * Return an array of all email addresses found in input string.
 */
function FindEmails(input) {
  var regex = /(?:[a-z0-9!#$%&'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+\/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/gm
  var result = input.match(regex);
  return result;
}

An email address parsing library "email-addresses" has been adapted for Google Apps Script. Source is forked and available as a gist.

• Publicly available, library key M26NvEFUvGLQadhq7G3OQmgFzUAA6_aCl.
• Documentation available here.

However... it will not find the email address in the string example you give! It expects the string containing addresses to loosely conform to RFC 5322.