These days, we are monitoring this issue:when one was developing a utility that monitors log files as they are updated.
On 2003, opening the log file folder in explorer, you can see the timestamp and files size change before your eyes each time the log is updated.
There are two methods of uploading files, using the sync client, or through the browser using drag and drop or an upload button. Scripting is turned off by default in Share Point Online.
When you turn scripting capabilities on, you also enable many other features.
I'm developing a Backbone based app, and the package of appears to be creating a conflict with how files are returned.
If I change one of the template files that is read by text.js, and refresh the page, the content is not updated accordingly; the template file is cached, even with a "hard refresh".
For details see Turn scripting capabilities on or off.