Textastic 6.3 adds a new JavaScript console that can show errors in your JavaScript code and allows you to log custom messages using the JavaScript Console object (for example by calling the console.log() method).

This has been added in Textastic 6.3!

This sounds like a nice idea, but it's probably out of the scope of Textastic because it is so specific. Maybe it would be a good idea for a new app.

Hello,

after the app starts, Textastic requests access to the iCloud folder in a background thread. Textastic shows an activity indicator until the operating system responds.

So this means that iOS on your device seems to take longer on the current version than it did in earlier versions. Textastic literally does nothing while the activity indicator is spinning and just waits for the operating system to return the iCloud folder so it can be accessed.

I haven't changed this in version 6, so I'm pretty sure you would see the same behavior in Textastic 5.3.1.

Does a reboot of your iPad help in any way?

You can upload files using the remote file transfer screen that appears by tapping on the "globe" button.

First, tap on "Remote" and add a Dropbox connection. Then navigate to the target folder.

You can then tap on "Local" and select the files and folders in "Local Files" or "iCloud" that you want to upload.

Tap on the "Upload" button in the bottom toolbar.

To edit files in Dropbox, you need to download them first. This is explained in these entries in the manual:

https://www.textasticapp.com/iphone/v6/manual/lessons/How_do_I_access_files_in_my_Dropbox_account.html

https://www.textasticapp.com/iphone/v6/manual/lessons/How_can_I_quickly_upload_downloaded_files.html

The current version 6.2 of Textastic for iOS does not support Emmet. This will be added in Textastic 6.3 which is currently in beta.

Did you try to select the YAML syntax that's already built-in?