Phone Number Validator

phonenumber.js

// Remap `exports` to `window` if `exports` doesn't exist.
if (!exports) var exports = window;

// Regex to match numbers to.
var REGEX = /^\(?(?=\d{3})(\d{3})[).\-\s]*(\d{3})[.\-\s]*(\d{4})$/;

String.prototype.replace = (function(orig) {
  return function(replace, replacement) {
    // Allow arrays to be used.
    if (replace instanceof Array) {
      var out = this.toString();
      replace.forEach(function(replace, id) {
        if (~[ 'string', 'number' ].indexOf(typeof replacement))
          out = out.replace(replace, replacement.toString());
        else
          out = out.replace(replace, replacement[id] && replacement[id].toString() || undefined);
      });
      return out;
    }
    return orig.apply(this, arguments);
  };
})(String.prototype.replace);


function convertAlpha(number) {
  return number.toString().replace([
    /[a-c]/ig,
    /[d-f]/ig,
    /[g-i]/ig,
    /[j-l]/ig,
    /[m-o]/ig,
    /[p-s]/ig,
    /[t-v]/ig,
    /[w-z]/ig
  ], [ 2, 3, 4, 5, 6, 7, 8, 9 ]);
}

exports.PhoneNumber = function(number, alpha) {
  var regex = REGEX;
  if (alpha) regex = regex.source.replace(/\\d/g, '[\\d\\w]');

  var match = number.match(regex);
  if (match) {
    return {
      full: convertAlpha(match.slice(1, 4).join('')),
      area: convertAlpha(match[1]),
      exchange: convertAlpha(match[2]),
      number: convertAlpha(match[3]),
      input: {
        full: match.slice(1, 4).join(''),
        area: match[1],
        exchange: match[2],
        number: match[3]
      }
    };
  }
  return match;
};

console.log(exports.PhoneNumber('1234567890'));
console.log(exports.PhoneNumber('ABCDEFGHIJ'));
console.log(exports.PhoneNumber('ABCDEFGHIJ', true));