Some questions/thoughts concerning the answer field

[kleinerpirat]

@FrankJH

which template engine uses Anki, and do you know
a good point to start?

AFAIK Anki doesn’t use an engine for the templating, but has its own implementation.

Cards are displayed in a webview, which means they’re like little websites.
If you learn a bit of web development (HTML/JS/CSS), you can make your cards do anything. Anything that works in a web browser will work on Anki cards too.

@FrankJH

testing the routines with javascript-alert’s is a little bit cumbersome … do
you know a simpler way?

My go-to method is to use console.log(...) and then inspect the previewer with the add-on AnkiWebView Inspector.

You could also use remote debugging as described here: How to see card preview's browser console - #3 by gla23

@FrankJH

Is there a possibility to integrate this in the Eclipse IDE, for example?

Using an IDE is a bit too much effort to set up in most cases. There’s no native integration for IDEs. But you could create a sample HTML file to test your scripts on / inspect it in the browser.