JSFiddle - React, Tailwind, and code Playground

HTML

<input name="ctl00$ContentPlaceholderMainContent$customerfields1$tbName" type="text"  id="tbName" style="width:150px;" />

<button id='ButtonId' disabled>Submit</button>

JavaScript

$('#tbName').keyup(function() { 
    if ($.trim($(this).val())!= '') {        
        $('#ButtonId').removeAttr('disabled');
    }else
    {$('#ButtonId').attr('disabled','disabled');
    }
});