JSFiddle - React, Tailwind, and code Playground

HTML

<input id="not-gonna-work" type="text"><br>
<input id="gonna-work" type="text">

JavaScript

var $inputs = $('input');
$inputs.each(function(){
    var $el = $(this),
        $val = $el.val();
   
    $el.bind("keyup",function(){
        var nv = $el.val();
        if(nv!=$val){
          // value changed show button
          console.log('changed');
          $val = nv;  
        }
        $val = nv + '.';
        $el.val($val);
    });
        
});