call a expression via JavaScript

[#1]

Hello,

currently I working on an extension project. In my extension, I want call via JavaScript a QlikView expression, can I do this with the JS-API. I don't want to use the a expression in the Definition.xml and also I don't want to use a variable in my QlikView document that store a expression.

Do you have some ideas?

[#2]

Sadly there is no clean and robust way to achieve that in the current version...