Hello,

currently, only syntax highlighting is supported for Go.

It's possible to add custom code completion files. You can find the existing code completion files for HTML, CSS, JavaScript, C, Objective-C and PHP at https://github.com/blach/Textastic-Customization/tree/master/CodeCompletion

I'm glad that it works for you!

This should also work in iOS 13 if you installed a monospaced font using an app like AnyFont.

On iPad you can hide these using the "Additional Keys" setting in Textastic. 

I can reproduce the problem with Japanese text. I'll try to find out what is going on.

I could reproduce and find a workaround for this problem just yesterday. It will be fixed in the next update.

This seems to be a JSX syntax definition for TextMate 2 which injects itself into the built-in JavaScript syntax.

Textastic only supports TextMate 1 (and Sublime Text 2) syntax definitions, which do not support injection.

Currently, you can only use copy/paste to copy text from a code editor tab and paste it into to a terminal tab.

Textastic only supports syntax definitions and some preferences found in Sublime Packages. It does not run Python code from Sublime Packages.

I just tried to reproduce this, but it works on my iPad.

Did you maybe change the keyboard shortcut in Settings -> Keyboard Shortcuts -> File -> Upload This File? If yes, you can reset it there.

What does the overlay show when you press and hold the Cmd key on your external keyboard?