You can invoke it by tapping on the console button in the toolbar on the preview screen. Here is a screenshot:

It still works for me in Textastic 6.3. I haven't removed it.

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).

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?