JAVASCRIPT

event on input or keydown or on paste value or on change jquery

<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
change (when text input field changes and loses focus)
$('input#field1').on('change', function(event) { console.log(this.value) });
$('input#field1').change(function(event) { console.log(this.value) });
keyup
$('input#field1').on('keyup', function(event) { console.log(this.value) });
$('input#field1').keyup(function(event) { console.log(this.value) });
paste
$('input#field1').on('paste', function(event) { console.log(this.value) });