JSFiddle - React, Tailwind, and code Playground

HTML

<input id='input1'>
<input id='input2'>

JavaScript

$('#input1').keyup(function(){
    console.log('input1.val: ', $('#input1').val())
    if($('#input1').val() != $('#input1').attr('prev_val'))
        $('#input2').val('change')
    else
        $('#input2').val('no change')
    $('#input1').attr('prev_val', $('#input1').val())
})