paper-scroll-header-panel scroll to bottom

[ralf....@googlemail.com]

I am using the paper-scroll-header-panel with an iron-list inside to display a chat dialog. The default scroll behavior of the paper-scroll-header-panel always shows the first element. So whenever I add an element to the buttom of the list it will not automatically scroll to this element.

I know how to scroll to the bottom but I am missing a trigger (an event or callback) which allows me to scroll to the bottom when the list is initialized or when I add a new element. The reason is, that the redering happens asynchronously after adding the elements. So at least it would be helpful to have a render-finished event or something like taht. Currently I implemented a workaround which does the scrolling with a timeout of 1 to 3 seconds. But this is not reliable, since the rednering time depends on the length of the list and on the CPU etc. and of course it is not a good design.

Any ideas?