when is re_Rendering complete?

Thanks Ido,
Maybe my question was not clear.
I wanted to take advantage of the fact that when a dynamic page is called by the user, it’s dataset is already filtered by the category field/s it is bound to, and I wanted to add additional filters to the current dynamic category field.

I know I can build the full filter (including the category field/s) and apply it to the datatset, but then I would control my dynamic page like any regular page, doing in code what the dynamic mechanism does.
What I was looking for was a way to use the already existing filter structure that the dynamic mechanism provides in each instance.

So in a regular page I use :
let myFilter = wixData.filter();
myFilter = myFilter.eq(‘categoryField’, “currentCategory”)
.contains(‘extraFilter1’, “value1”) .contains(‘extraFilter2’, “value2”);
$w(“#myDataset”).setFilter(myFilter);

And in a dynamic page I would like to use a getFilter() which does not exist :
let myFilter = $w(“#myDynamicDataset”).getFilter(); // .eq(‘categoryField’, “currentCategory”)
myFilter = myFilter .contains(‘extraFilter1’, “value1”) .contains(‘extraFilter2’, “value2”);
$w(“#myDataset”).setFilter(myFilter);

If something like this isn’t possible, than I will manage the complete filter and probably will do it in a regular page instead of dynamic page.
What do you think?
Ofer