Unfortunately it doesn't works with 'OneDrive.' It either tries to download the file or displays a preview of the source code. This is a restriction imposed by Microsoft, while it is technically possible that they cloud change it, they probably won't.
However it does works with 'OneDrive for Business,' which is a different, separate product and basically is a SharePoint list with a custom interface. (To clarify, I am not using Windows; but Office365 (which includes Azure Active Directory) inside my web browser) However I would be cautious with SharePoint Online, as I do not remember changing any file permissions and a few months ago it wasn't saving inside the web browser. Therefore Microsoft must have changed/updated something. And if they lifted some restriction then they can also undo it when they wish. I also had a quick look at the Wikipedia page for WebDAV. https://en.wikipedia.org/wiki/WebDAV So you are saying that all one needs is a server (like Apache) that supports WebDAV and it will save over its own HTML file, possibly after entering credentials, right? Tom -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/0d31b49d-51af-45d3-8a5e-6c51f11ebe1e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

