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flimsy
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Super Charging Fine-Grained Reactive Performance
An implementation of this might look like the following (code by Fabio Spampinato):
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Preact Signals
These are difficult to understand concepts imo. I have written an annotated implementation of a simple reactive system (you may want to run it through Prettier if that's your thing): https://github.com/fabiospampinato/flimsy/blob/master/src/fl...
A signal is basically a function that you have to go through to read and write a value. In the case of Preact the function is split into getter and setter assigned to the "value" property. The interesting thing about signals is that they can tell their parent computation to re-execute, automatically, without any manual dependency array.
A computed is a signal generated from a function rather than a primitive. So like the function that generates the value is re-executed automatically whenever any of the signals read inside it change.
blog
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Preact Signals
FWIW, one specific counter-example would be Etsy choosing to adopt Preact to migrate upwards from React 15:
- https://github.com/mq2thez/blog/blob/main/upgrade-react-etsy...
- https://www.etsy.com/codeascraft/mobius-adopting-jsx-while-p...
- Etsy Moves from React to Preact
- Etsy moved to Preact!
What are some alternatives?
signals - Manage state with style in every framework
usignal - A blend of @preact/signals-core and solid-js basic reactivity API
dependable-view - View layer for @dependable/state
dependable-example-todomvc - TodoMVC example in @dependable/view
dependable-example-hackernews - Hackernews example using @dependable
dependable-state - Observables and computeds for state management
jotai - 👻 Primitive and flexible state management for React
cellx - The ultra-fast implementation of reactivity for javascript
reactively