OMG, suddenly don’t know how, something rings a bell in my head, CP doesn’t need to “seeing” or watch other property(ies) in order to make it be calculated.
If CP is used somewhere else, like passed as property to another component or rendered in template, it will be calculated and you will get the value, right?
Am I right? Ha! I was totally wrong about CP, how foolish I am!
Thank you, no matter how I get though this, you indeed reminds me the possibilities. Oh, I need to write a demo to confirm that, see you around, have a nice day!