JSFiddle - React, Tailwind, and code Playground

by slawe

HTML

<input type="text" class="customer_fields_input_label">
<input type="text" class="customer_fields_input_key_name" disabled>

JavaScript

$(function () {
  var label = $('.customer_fields_input_label'),
      key_name = $('.customer_fields_input_key_name');

  label.on('input', function() {
  	alert($(this).val());
    key_name.val($(this).val());
});

});