generator.html

<!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>Document</title>
</head>
<body>
    <script>
        function* getData() {
            console.log("task 1");
            console.log("task 2");
            yield {"name": "a", "age": 32}; // use yield to return yield await getProductData()
            console.log("task 3");
            yield 100;
            console.log("task 4");
            yield "Order placed!!!";
        }


        var iter = getData();
        // let obj = iter.next();
        // console.log(obj.value, obj.done);
        // let num = iter.next();
        // console.log(num.value, num.done);

        // let msg = iter.next();
        // console.log(msg.value, msg.done);
    </script>
</body>
</html>