Merge pull request 'refs #4869 no borrar pin al abrit dialogo' (#10) from 4869-workerTimeControl into test

Reviewed-on: #10

js/index.js

@@ -10,6 +10,7 @@ function setEvents() {
     const heartEl = document.querySelector('body > h1 > span');
     heartEl.addEventListener('click', function() {
         const key = prompt('Introduce la clave');
+        if (key === null) return 
         localStorage.setItem('vnKey', key);
     });