WordPress Custom JSS and CS Pro
If you ever have the chance to use the WordPress PlugIn, Simple Custom JSS and CS Pro, you'll find it very helpful. But...
Over several versions there is an issue when installing it. Even when permissions are set perfectly on the file system for ownership, files, and directories, the installation will not create a necessary directory. As a result, you'll find that the plugin doesn't seem to work.
The solution is simple. Create the custom-css-js directory in this location /WhatEverPathToWebRoot/wp-content/uploads