| Name | Lines of code | Maintainability | Test coverage |
| src/js/tracks/track.js | 32 | A 2 hrs | |
| src/js/tracks/video-track-list.js | 74 | C 1 day | |
| src/js/tracks/video-track.js | 35 | B 5 hrs | |
| src/js/utils/browser.js | 38 | A 0 mins | |
| src/js/utils/buffer.js | 20 | A 25 mins | |
| src/js/utils/dom.js | 262 | B 4 hrs | |
| src/js/utils/events.js | 194 | F 3 days | |
| src/js/utils/fn.js | 9 | A 0 mins | |
| src/js/utils/format-time.js | 16 | A 45 mins | |
| src/js/utils/guid.js | 4 | A 0 mins | |
| src/js/utils/log.js | 33 | A 0 mins | |
| src/js/utils/merge-options.js | 22 | A 0 mins | |
| src/js/utils/stylesheet.js | 13 | A 0 mins | |
| src/js/utils/time-ranges.js | 41 | A 0 mins | |
| src/js/utils/to-title-case.js | 4 | A 0 mins | |
| src/js/utils/url.js | 55 | A 1 hr | |
| src/js/video.js | 129 | A 2 hrs |