| Name | Lines of code | Maintainability | Test coverage |
| src/ToolbarButton.js | 25 | ||
| src/languages/CSS.js | 47 | B 6 hrs | |
| src/languages/CoffeeScript.js | 65 | B 6 hrs | |
| src/languages/Haxe.js | 88 | C 1 day | |
| src/languages/Jade.js | 65 | B 6 hrs | |
| src/languages/JavaScript.js | 61 | B 4 hrs | |
| src/languages/Markdown.js | 48 | A 2 hrs | |
| src/languages/PHP.js | 80 | C 7 hrs | |
| src/languages/Python.js | 71 | B 4 hrs | |
| src/languages/Ruby.js | 75 | B 5 hrs | |
| src/languages/Stylus.js | 50 | A 3 hrs | |
| src/languages/XML.js | 58 | C 1 day | |
| strings.js | 4 | ||
| thirdparty/espree.js | 5,906 | F 2 mos | |
| thirdparty/htmlparser2.js | 3,326 | F 2 mos | |
| thirdparty/php-parser.js | 5,652 | F 4 mos | |
| thirdparty/postcss-safe-parser.js | 5,443 | F 2 mos | |
| thirdparty/promise.js | 511 | F 1 wk |