如何计算观看视频的百分比

  document.addEventListener('DOMContentLoaded', (event) => {
            const video = document.getElementById('myVideo');
            const percentageWatched = document.getElementById('percentageWatched');

            video.addEventListener('timeupdate', () => {
                const watchedPercentage = (video.currentTime / video.duration) * 100;
                percentageWatched.innerHTML = `You've viewed ${watchedPercentage.toFixed(2)}% of this episode.`;
            });
        });