| <body style="width:800px"> | |
| <p>Birthday</p> | |
| <video src="test.mp4"></video> | |
| <p>Birthday</p> | |
| <script> | |
| const track = document.querySelector('video').addTextTrack('captions', 'English', 'en'); | |
| track.mode = 'showing'; | |
| for (let i = 1; i <= 3; i++) | |
| track.addCue(new VTTCue(i, i + 0.5, 'Birthday ' + i)); | |
| </script> | |
| </body> |