feat: add validation for book input and alert on invalid inputs

script.js

@@ -33,5 +33,36 @@ const renderTable = (books) => {
     }    
 
 }
+const validateForm = (tittle, author, year, score) => {
+    if (!tittle || !author || !year || !score) return false;
+    if (year < 0 || score < 0 || score > 10) return false;
+    return true;
+}
+
+const addBook = (tittle, author, year, score) => {
+    if(!validateForm(tittle, author, year, score)) {
+        alert('Datos invalidos');
+        return;
+    }
+
+    books.push({tittle: tittle, year: Number(year), score: Number(score), author: author});
+    renderTable(books);
+}
+
+document.getElementById('boton-agregar').addEventListener('click', () => {
+
+    const tittle = document.getElementById('titulo').value;
+    const author = document.getElementById('autor').value;
+    const year = document.getElementById('anio').value;
+    const score = document.getElementById('calificacion').value;
+
+    addBook(tittle, author, year, score);
+
+    document.getElementById('titulo').value = "";
+    document.getElementById('autor').value = "";
+    document.getElementById('anio').value = "";
+    document.getElementById('calificacion').value = "";
+})
+
 
 renderTable(books);