javascript - How to modularize jQuery? -

i trying modularize following code, there object functions declared globally , bad practice

$(document).ready(function() {     $('#registrationform').on('submit', function(event) {         var valid = checkvalidate();         if(!valid) {             event.preventdefault();         }     });      $('#termsaccepted').on('change', function() {         if($(this).is(":checked")) {             $('.error').hide();         }     });      $('#otherpaymentid').hide();     $('#paymentid').on('change', showpaymentidbox); });  var showpaymentidbox = function() {     var myradio = $('input[type=radio][name=paymentid]:checked').val();      if (myradio == 0) {         $('#otherpaymentid').hide().val('');     } else {         $('#otherpaymentid').show();     } }  var checkvalidate = function() {     var validity = true;       if(!$('#termsaccepted').is(":checked")) {         $('.error').text('please agree terms').show();         validity = false;     }      if($('#otherpaymentid').val() == "" && $('input[type=radio][name=paymentid]:checked').val() == 1) {         $('.error').text('please enter valid payment id field').show();         validity = false;     }      if(!checkemail($('#otherpaymentid').val()) && $('input[type=radio][name=paymentid]:checked').val() != 0 ) {         $('.error').text('please enter valid payment id field').show()         validity = false;     }      return validity; }  var checkemail = function(email) {     if(email != '') {         var regex = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;         return regex.test(email);     } else {         return false;     } } 

is using anonymous function wrapper 1 way approach it, tips? how 1 improve on this?

you can organize code in many ways.

1 namespace.

var myapp = myapp || {};  myapp = {  init: function(){     //initialization , events     $('#registrationform').on('click', ...)     ...  },  showpaymentidbox: function(){},  checkvalidate: function(){},  checkemail: function(){} } 

2 amd/ commonjs modules

requirejs / browserify etc..

eg:- var showpaymentidbox = require('showpaymentidbox');

3 es6

webpack / babblejs

eg: import "showpaymentidbox";