feat: Adiciona Script

scripts/app.js

@@ -0,0 +1,69 @@
+document.addEventListener("DOMContentLoaded" , function() {
+    const list = [];
+
+    const form = document.querySelector(".shopping-form");
+    const itemInput = document.querySelector(".shopping-form-item-input");
+    const quantityInput = document.querySelector(".shopping-form-quantity-input");
+    const incrementButton = document.querySelector(".shopping-form-increment-button");
+    const decrementButton = document.querySelector(".shopping-form-decrement-button");
+    const items = document.querySelector(".shopping-items");
+
+    incrementButton.addEventListener("click" , incrementQuantity);
+    decrementButton.addEventListener("click" , decrementQuantity);
+    form.addEventListener("submit" , addItemToList)
+
+    function incrementQuantity() {
+        const currentValue = Number(quantityInput.value);
+        const newValue = currentValue + 1;
+
+        quantityInput.value = newValue;
+    }
+
+    function decrementQuantity() {
+        const currentValue = Number(quantityInput.value);
+        const newValue = currentValue - 1;
+
+        if (newValue > 0) {
+            quantityInput.value = newValue;
+        }
+    }
+
+    function addItemToList(event) {
+        event.preventDefault();
+
+        const itemName = event.target["item-name"].value;
+        const itemQuantity = event.target["item-quantity"].value;
+
+        if (itemName != "") {
+            const item = {
+                name: itemName,
+                quantity: itemQuantity,
+            };
+    
+            list.push(item);
+            
+            renderListItems();
+            resetInputs();
+        }
+    }
+
+    function renderListItems() {
+        let itemsStructure = "";
+
+        list.forEach(function(item) {
+            itemsStructure += ` 
+            <li class="shopping-item">
+                <spam>${item.name}</spam>
+                <spam>${item.quantity}</spam>
+            </li>
+            `
+        });
+
+        items.innerHTML = itemsStructure;
+    }
+
+    function resetInputs() {
+        itemInput.value = "";
+        quantityInput.value = 1;
+    }
+});