How to load Variable in Bookmark or use additive Bookmarks?

[chr_pro]

Hi

we just migrated to QlikSense and faced a problem when trying to implement our additive Bookmarks that were used in QlikView.

Our Users were able to lock the Date Field and select a (additive) Bookmark to apply Filters.

In QlikSense i can't seem to find the additive Bookmark feature. So i was looking for another Solution.

This is the one im trying to implement right now:

1) Select a Date from Date Picker

2) Click save Button ( Action: set variable -> vTestVar -> =GetFieldSelections(L_DATE)

3) Apply Bookmark with set variable <--- This is the Step i cant figure out. 

I'm trying to create a Bookmark with =L_DATE='$(vTestVar)' but the variable will not be recognized by the Date Filter!

Even though i just assigned another Date to my variable vTestVar(tested in Textbox), it will show up the current Selection of L_DATE

I would be open to other Solutions to my Problem as well.

Any help is appreciated, thank you for reading

[chr_pro]

It is working to some degree now

I was able to apply the variable to the Bookmark, but it is only working if there is not more than 1 Date in the Variable.. 

If there are 2 Dates it will save in variable as '01.01.2021, 02.01.2021' for example and that logic will not apply to my bookmark (which i cant post here since i have more than 100 bookmarks(will only show 100 in list for some reason) -> new ones will show up at the end of the list and if i search for it i cant check the logic behind, sigh)

Hopefully you get what i mean, i basically cant apply more than 1 Date in my Bookmark variable