Simply init the elements via cmpRipple(elements);.
Try clicking the following buttons or the page background itself.
Limit your query to single elements, if you want to.
Notice how click events bubble up to the page wrapper on buttons w/o effect.
You can still allow for event bubbling via option { bubble: true }.
This is a simple Text.
You can tap it too … – but you already knew that.
The circle has a different color though.
Tap inside this div: