How should I do animation in CSS in start and end displaying element in dom-if?
i see some examples of how to do this i dom-repeat but I have no idea how to code this in dom-if.
I don't know how to detect is element appers on screen or not. I know i can make observable on dom-if variable, but what next? The elemet is still null after switch new value in dom-if, just after second the element isn't null. How to detect this, and add animation?
If this will by simpler - I can have only "start" animation