JavaScript/lesson-05/addtocart.html at main · deep100x/JavaScript · GitHub

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<!-- in this lesson: -->
<!-- ------------------- -->
<!--

    Lesson 5 : Variables

    1. Add to cart feature

-->

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Add to cart</title>

    <!-- 🟨CSS -->
    <style>

    </style>
</head>

<body>

    <button onclick="
        console.log(`Cart Quantity : ${cartQuantity}`);
    ">
        Show Quantity
    </button>
    <button onclick="
        // 🟩cartQuantity = cartQuantity + 1;
        // 🟩cartQuantity += 1;
        // 🟩cartQuantity++;
        cartQuantity++;
        console.log(`Cart Quantity : ${cartQuantity}`);
    ">
        Add to Cart
    </button>
    <button onclick="
        // cartQuantity = cartQuantity + 2;
        cartQuantity += 2;
        console.log(`Cart Quantity : ${cartQuantity}`);
        ">
        +2
    </button>
    <button onclick="
        // cartQuantity += 3;
        cartQuantity = cartQuantity + 3;
        console.log(`Cart Quantity : ${cartQuantity}`);
    ">
        +3
    </button>
    <button onclick="
        cartQuantity = 0;
        console.log('Cart was reset');
        console.log(`Cart Quantity : ${cartQuantity}`);
    ">
        Reset Cart
    </button>


    <!-- 🟨JavaScript -->
    <script>

        let cartQuantity = 0;

    </script>
</body>

</html>