| Name | Lines of code | Maintainability | Test coverage |
| src/Document.js | 130 | A 0 mins | |
| src/utils/Url.js | 151 | B 6 hrs | |
| src/HTMLElement/elements/HTMLSelectElement.js | 166 | B 6 hrs | |
| src/HTMLElement/elements/HTMLTableElement.js | 181 | D 1 day | |
| src/ParentNode.js | 208 | C 1 day |