Parse a list of emails separated by comma (,) or semicolon (;)

parseEmailList.js

/**
 * Regex source: https://html.spec.whatwg.org/multipage/forms.html#valid-e-mail-address
 */
const EMAIL_REGEX = /[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*/g;

/**
 * Parse a list of valid emails from the specified text.
 * 
 * @param {String} text The string of email addresses to parse.
 * @returns {[{email: String, name: String}]}
 */
function parseEmailList(text) {

  let emails = [],
    match, idx = 0;
  while (match = EMAIL_REGEX.exec(text)) {
    const value = extractEmail(idx, match);
    if (value.isValid) {
      emails.push(value);
    }
    idx = match['index'] + match[0].length;
  }

  return emails;

  function extractEmail(idx, match) {
    var display;
    if (display = displayName(text.substring(idx, match['index']))) {
      return createEmail(match[0], display);
    } else {
      return createEmail(match[0]);
    }
  }

  function createEmail(email, name) {
    return {
      email: email || '',
      name: name || '',
      isValid: !!(email || '').length,
    };
  }

  function displayName(text) {
    /* Remove all quotes, whitespace, brackets, and commas from the ends. */
    return text.replace(/(^[\s,;>]+)|"|([\s,;<]+$)/g, '');
  }
}

Inspiration: https://gist.github.com/bboe/c9adabdc1368193879d0