JSFiddle - React, Tailwind, and code Playground

by Rapha Souza

HTML

<script>
function CustomAlert(){
    this.render = function(dialog){
        var winW = window.innerWidth;
        var winH = window.innerHeight;
        var dialogoverlay = document.getElementById('dialogoverlay');
        var dialogbox = document.getElementById('dialogbox');
        dialogoverlay.style.display = "block";
        dialogoverlay.style.height = winH+"px";
        dialogbox.style.left = (winW/2) - (550 * .5)+"px";
        dialogbox.style.top = "100px";
        dialogbox.style.display = "block";
        document.getElementById('dialogboxhead').innerHTML = "TĂ­tulo";
        document.getElementById('dialogboxbody').innerHTML = dialog;
        document.getElementById('dialogboxfoot').innerHTML = '<button onclick="Alert.ok()">OK</button>';
    }
	this.ok = function(){
		document.getElementById('dialogbox').style.display = "none";
		document.getElementById('dialogoverlay').style.display = "none";
	}
}
var Alert = new CustomAlert();
</script>
<div id="dialogoverlay"></div>
<div id="dialogbox">
  <div>
    <div id="dialogboxhead"></div>
    <div id="dialogboxbody"></div>
    <div id="dialogboxfoot"></div>
  </div>
</div>
<h2>Meus Alerts modificados</h2>
<button onclick="alert('Alert Normal')">Alert Normal</button>
<button onclick="Alert.render('Alert Modificado')">Custom Modificado</button>

CSS

#dialogbox{
	display: none;
	position: fixed;
	background: #000;
	border-radius:7px; 
	width:550px;
	z-index: 10;
}
#dialogbox > div{ background:#FFF; margin:8px; }
#dialogbox > div > #dialogboxhead{ background: #666; font-size:19px; padding:10px; color:#CCC; }
#dialogbox > div > #dialogboxbody{ background:#333; padding:20px; color:#FFF; }
#dialogbox > div > #dialogboxfoot{ background: #666; padding:10px; text-align:right; }

JavaScript

Alert.render('Alert Diferente')