问题
I've researched a lot but still haven't found a good answer. When should I use on-click and when on-tap, specifically w/ Polymer?
This guide focuses on programmatic event listeners, so isn't helpful in that regard:
https://www.polymer-project.org/docs/polymer/touch.html
回答1:
Use on-tap all the time, because the semantics of on-tap are better aligned with mobile devices than on-click.
For example, on-click does not fire if another finger is touching the screen, or if the element directly under the finger does not have a mouse handler. There are also some complications with getting on-click to work while you are scrolling. Use on-tap unless there is a compelling reason not to.
回答2:
It seems that it's changing depending on Polymer version.
Because, different Polymer versions suggest different things:
In Polymer 2 documentation, there's a warning (suggestion) for using click event.
In Polymer 3 documentation, the warning is not available anymore.
来源：https://stackoverflow.com/questions/26386369/when-to-use-on-click-or-on-tap-w-polymer