JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link href="https://fonts.googleapis.com/css?family=Quicksand" rel="stylesheet">
    <title>Document</title>
    <style>
        body {
            background-color: #282828;
            margin: 0;
            padding: 0;
        }
        h1 {
            color: #F28;
            text-align: center;
            font-family: 'Quicksand', sans-serif;
            font-size: 58px;
            
            position: absolute;
            top: 30%;
            left: 50%;
            transform: translate(-50%,-50%);
            line-height:1.5em;
        }
        input {
            text-align: center;
            font-family: 'Quicksand', sans-serif;
            font-size: 15px;
            position: absolute;
            top: 65%;
            left: 50%;
            transform: translate(-50%,-50%);
        }
    </style>
</head>
<body>
    <h1><em>Escreva o nome de alguem.</em></h1>

    <link type="text/javascript" src="page.js">
    <input type="text" name="Thing" value="" />
</body>
</html>

JavaScript

window.onload = function () {
    
    /* event listener */
    document.getElementsByName("Thing")[0].addEventListener('change', doThing);
    
    /* function */
    function doThing(){
       if (this.value == "Bianca") {
       		document.querySelector("em").innerText = "Mulher do Mateus Nery"
       } else if (this.value == "Veronica") {
       document.querySelector("em").innerText = "Ta namorando !!"
       }
       else if (this.value == "Juan") {
       document.querySelector("em").innerText = "Bixa pao com ovo !!"
       }
       else if (this.value == "Raissa") {
       document.querySelector("em").innerText = "Sapatao !!!"
       } else {
       document.querySelector("em").innerText = this.value;
       }
    } 
    
}