javascript - other ways to write regular expression -

are there other ways can write regular expression?

for

var pattern = /^(1[-\.\s])?([{]?\d{3})?[)]?\)?[-. ]?(\d{3})[-. ]?(\d{3})[-. ]?(\d{4})$/; 

"use strict";  var $ = function(id) { return document.getelementbyid(id); };    var validatephone = function() {      var phone = $("phone").value;      //var pattern = /^\d{3}-\d{3}-\d{4}$/;             var pattern = /^(1[-\.\s])?([{]?\d{3})?[)]?\)?[-. ]?(\d{3})[-. ]?(\d{3})[-. ]?(\d{4})$/;            // 1-999-999-9999        var isvalid = pattern.test(phone);              $("message").firstchild.nodevalue = (isvalid) ? "valid phone number" : "invalid phone number";  };    window.onload = function() {      $("validate").onclick = validatephone;      $("phone").value = "";  // set default phone number  };

i know validates phone number lets 1-111-111-1111,

but there other ways recreate code make have same features?