Lessons 82+ are 404

[metareeff]

Lesson links are broken

[Nick-Hope]

All these broken links and missing resources were driving me crazy until I realized what was going on...

The links in the 'master' drop-down menu are different, depending on where you open it from. If you open the menu from https://github.com/iamshaunjp/modern-javascript then the link to lesson-82 will take you to the correct place, which in this case is https://github.com/iamshaunjp/modern-javascript/tree/lesson-82

However if you were to open the 'master' menu from elsewhere in the tree such as https://github.com/iamshaunjp/modern-javascript/blob/lesson-61/chapter_7/sandbox.js then the 'lesson-100' link will take you to https://github.com/iamshaunjp/modern-javascript/blob/lesson-82/chapter_7/sandbox.js which does not exist, so you get a 404-page not found error.

It looks like you can open that 'master' menu from any 'lesson-XX' level in the tree and the links will be found correctly.