I don't use Nextcloud myself, but the Nextcloud app includes a file provider, so you can add it as a location in the Files app. Then, you have the following options:

• Use the "Open…" command in Textastic to open a file using the iOS document picker
• Use the "Share" command in the Files app and select Textastic to open the file in Textastic
• Drag a file from the Files app to Textastic to open it
• It might also be possible to share directly from the Nextcloud, but I'm not sure if their app supports it

You can find more information about external files in the manual: https://www.textasticapp.com/v9/manual/integration_other_apps/external_files_folders.html

Currently not, sorry. Thanks for your suggestion. I'll consider it for a future update.

Hello,

unfortunately this is not currently possible in Textastic for macOS. It could be done with regular expression search and replace, but this is not yet implemented, sorry.

Hello,

do you maybe have a different default browser set than Safari? Not all third party browsers support localhost links (for example Brave doesn't support them). 

See https://support.apple.com/en-us/HT211336

I can reproduce the issue when trying to use "Create External File" with OneDrive.

This looks like a bug in the OneDrive file provider that is out of my control. 

I tested it successfully with Dropbox, iCloud Drive, "On my iPad" and Working Copy - only OneDrive seems to have this problem.

Thanks for the logs, I'll try to reproduce it.

How exactly did you create the new file and where did you save it? Did you use the "Create External File" command while offline?

(I don't use OneDrive myself, but I heard a few times that the OneDrive file provider is not very reliable.)

I can only point you to the Sublime Text documentation on syntax definitions at https://www.sublimetext.com/docs/syntax.html 

Please note that Textastic only supports the features of Sublime Text 3.0 syntax definitions, not later ones.

Maybe you can find a TextMate 1 bundle or Sublime Text 3 package of a language that is similar to Batari Basic and modify it?