Take, for example, the following class, which uses WeakMaps for its private
data:
```js
let _counter = new WeakMap();
let _action = new WeakMap();
class Countdown {
constructor(counter, action) {
_counter.set(this, counter);
_action.set(this, action);
}
dec() {
let counter = _counter.get(this);
if (counter < 1) return;
counter--;
_counter.set(this, counter);
if (counter === 0) {
_action.get(this)();
}
}
}
```
If you wrap an instance of `Countdown` with a revocable Proxy (e.g. when it is
returned by a method inside a membrane) that resets its private state, because
its `this` changes.
Right? If yes then I’d expect that to cause problems for code that uses
WeakMaps for private data.
--
Dr. Axel Rauschmayer
a...@rauschma.de
rauschma.de
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