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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>购物车</title>
</head>
<body>
<h1>购物车</h1>
<div id="cart"></div>
<h2>添加商品到购物车</h2>
<form id="add-to-cart-form">
<label>
商品ID：
<input type="number" id="add-product-id">
</label>
数量：
<input type="number" id="add-quantity">
<button type="submit">添加到购物车</button>
</form>
<h2>从购物车中移除商品</h2>
<form id="remove-from-cart-form">
<input type="number" id="remove-product-id">
<button type="submit">从购物车中移除</button>
<script src="main.js"></script>
</body>
</html>
