Lifecycle hooks about spect

[dy]

! quite elegant mount-fx solution is mount(() => () => /* unmount */)

[dy]

? should selector aspects call destructor on unmount?

• sounds meaningful to free memory
  − we [can] keep aspects as weak refs
  • still destructor is meaningful to clean up aspect
    . there's no destructor. There's main render and mount/unmount hooks.
    ? should non-selector aspects keep element reference regardless of mount/unmount?
    . possibly such "independent" elements should be handled in reference to context aspects, so if they disappear from the parent aspect's scope, their own aspect's destructor is called. But if they were initialized at the root, eg. $(document.body), then destructor is impossible to be reached.
    . for some real elements aspects can create blocking refs. For example, user wants to remove this element - but if there was an aspect registered at the root level as $(el, aspect), this aspect will remain after the mount/unmount. Best we can - keep aspects as weak as possible and encourage removing refs on unmount.
    . without mount/unmount hooks we'd re-register state every re-render, so they should be scoped.