Copy text of a field into another automatically

Question

I need to copy the text entered in a field (whether it was typed in, pasted or from browser auto-filler) and paste it in another field either at the same time or as soon as

Answer 1

Try something like:

$(document).ready(function () {
    $('#field_1').on('change', function (e) {
       $('#field_2').val($('#field_1').val());
    });
});

Heres a fiddle: http://jsfiddle.net/otwk92gp/