This is now live on latest Discourse
I’m running an experiment on Meta since earlier today, where you get Tactile feedback when liking (or unliking) a post.
We use the Vibration API, and by the means of feature detection ask the device to vibrate where it is available. It also respects your device configuration (aka devices with vibration disabled don’t vibrate on like).
It’s implemented currently as a simple #theme-component, just to explore the possibilities.