Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="comentario"></textarea>

<a href="">Sair da página</a>

JavaScript

window.onbeforeunload = confirmExit;
function confirmExit()
{
    if(document.getElementById("comentario").value != ""){
        return "Deseja realmente sair desta página?";
    }
}

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JSFiddle - React, Tailwind, and code Playground

HTML

JavaScript

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Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console