Vue 3.0JS的ref方法-CFANZ编程社区

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

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>ref方法</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>

<body>
    <div id="app">
        <post-item :post-content="content"></post-item>
    </div>
    <script>
        const { ref, watchEffect } = Vue;
        //创建函数
        const state = ref(0)
        watchEffect(() => {
            document.body.innerHTML = `商品库存为:${state.value}台`
        });
    </script>
</body>

</html>