JSFiddle - React, Tailwind, and code Playground

by dife

HTML

<input type="text"  id="texto" />
<input type="submit" id="btn" value="Mostrar value do campo de texto"/>

JavaScript

let botao = document.getElementById("btn");

botao.addEventListener("click", (e) => {
   let campoTexto  = document.getElementById("texto").value;
   e.preventDefault(); 
   alert(campoTexto);
});