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9.9b_prac.html
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9.9b_prac.html
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<!DOCTYPE html>
<html>
<head>
<title>cart quantity</title>
</head>
<body>
<button onclick="show();">Show Quantity</button>
<button onclick="addtocart();">Add to Cart</button>
<button onclick="updatedCartQuantity(1);">+1</button>
<button onclick="updatedCartQuantity(2);">+2</button>
<button onclick="updatedCartQuantity(3);">+3</button>
<button onclick="updatedCartQuantity(4);">+4</button>
<button onclick="updatedCartQuantity(5);">+5</button>
<button onclick="reset();">Reset Cart</button>
<button onclick="updatedCartQuantity(-1)" ;>-1</button>
<button onclick="updatedCartQuantity(-2)" ;>-2</button>
<button onclick="updatedCartQuantity(-3)" ;>-3</button>
<p class="js-display"></p>
<script>
let cartQuantity = 0;
function updatedCartQuantity(value) {
if (cartQuantity + value >= 11) {
alert('Cart is Full');
}
else {
cartQuantity += value;
console.log(`Cart Quantity: ${cartQuantity}`);
}
output();
}
function reset() {
cartQuantity = 0;
console.log('Cart was RESET.');
console.log(`Cart Quantity ${cartQuantity}`);
output();
}
function addtocart() {
if (cartQuantity+1 > 10) {
alert('Cart is Full');
}
else {
cartQuantity++;
console.log(`Cart Quantity: ${cartQuantity}`);
}
output();
}
function show() {
cartQuantity = cartQuantity;
console.log(`Showing Quantity: ${cartQuantity}`);
output();
}
function output(){
document.querySelector('.js-display').innerHTML=`Cart Quantity: ${cartQuantity}`;
}
</script>
</body>
</html>