Add the question from #101 to the Q&A section: What is the relationship / how different from proxies? #102
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ddamato
reviewed
Apr 1, 2024
| @@ -612,6 +612,10 @@ Note: untrack doesn't get you out of the `notifying` state, which is maintained | |||
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| **A**: Signals can form an efficient basis for store-like state management abstractions. A common pattern found in multiple frameworks is an object based on a Proxy which internally represents properties using Signals, e.g., [Vue `reactive()`](https://vuejs.org/api/reactivity-core.html#reactive), or [Solid stores](https://docs.solidjs.com/concepts/stores). These systems enable flexible grouping of state at the right level of abstraction for the particular application. | |||
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| **Q**: What are Signals offering that `Proxy` doesn't currently handle? | |||
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| **A**: Proxies must wrap some object. Proxies, by themselves, are not all that useful, but can't be used to create reactive-versions of Map, Set, Object, Array, etc. See Prior Implementations [tracked-built-ins](https://github.com/tracked-tools/tracked-built-ins/tree/master/addon/src/-private). | |||
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I don't think this illustrates the answer to the question. Why is Proxy wrapping an object not like a Signal? I'd argue Proxy is very useful for listening to object changes which looks like what Signal is doing. What isn't reactive1 about the following?
function doit() {...}
const proxy = new Proxy({}, {
set(target, name, val) {
if (name === 'doit') {
doit(val)
}
}
});
proxy.doit = trueFootnotes
-
I assume that the word "reactive" means something more than responds to change, but that isn't clear from the readme either. ↩
littledan
approved these changes
Apr 1, 2024
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Tries to answer: #101