<!-- BEGIN COPY / PASTE -->
        function fetchData() {
            return new Promise((resolve, reject) => {
                setTimeout(() => {
                    const data = { message: "Hello, world!" };
                    resolve(data);
                }, 1000);
            });
        }

        fetchData()
            .then(response => {
                console.log(response.message);
            })
            .catch(error => {
                console.error("Error:", error);
            });
        <!-- END COPY / PASTE -->