Save Object.observe()! (please) + make WeakMap/WeakSet observable.
Tom Van Cutsem
tomvc.be at gmail.com
Wed Nov 4 22:01:01 UTC 2015
2015-11-04 0:22 GMT+01:00 Coroutines <coroutines at gmail.com>:
> With Object.observe() you get a global view of events generated by the
> target object, with Proxy you need to replace references to the target
> object with references to the Proxy.
> Now I'm changing my opinion again. We need both.
I won't speak to whether we really need both, but your analysis that they
cater to different use cases is correct:
- O.o allows one to asynchronously observe (not intercept) operations on
another one's objects. This is safe.
- Proxies allow one to synchronously intercept operations on one's own
objects. This is safe.
- Proxies can obviously also be used to just observe one's own objects. As
an existence proof, I once did a simple O.o polyfill using proxies <
This is not generally useful though.
- Proxy.startTrapping would allow one to synchronously intercept operations
on another one's objects. This way lies madness. Don't go there.
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