Started a new job this week, picking up the front end development of a property management system, since they're old developer just left.

Oh my god was his code bad, inconsistent use of js versions e.g only sometimes using lambda for anonymous functions, variable names that were a single letter, no comments, no documentation, and over 30000 lines split into almost 30 js files, following the logic of it is as fun as a hedge maze with no exit.