         datalist.appendChild(document.createElement('option'));
            }
            return datalist.options.length;
        });

        // 2. Check if options is same object and live
        testPart(() => {
            const datalist = document.createElement('datalist');
            for (let i = 0; i < 10; i++) {
                datalist.appendChild(document.createElement('option'));
            }
            for (let i = 0; i < 10; i++) {
                datalist.appendChild(document.createElement