模板字符串是什么

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

<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title></title>

</head>

<body>


    <script>
        let abc = "这个是let";
        const AB = "这是常量";
        var a = "wulei";
        var b = "吃饭";
        var c = "睡觉";

        console.log(a + '正在' + b + '然后' + c);

        //模板字符串
        console.log(`${a}正在${b}然后${c}`);
    </script>
</body>

</html>

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