galaxy.ts v0.0.0
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Reactive selectors
"Selectors" are functions that take some arguments (often observable) and return some value (which is then deep frozen). The return value is provided to a React component (using render props) or another selector (using the derive function).
The "reactive" part means anything a selector accesses (from its arguments or any galaxy) is observed whenever possible. Every time an observed value changes, the selector is called. Every time the selector returns a value that's different from its previous return value, anything observing the selector is notified.
Observable and immutable? What?
Whenever immer copies an immutable object, Galaxy notifies the observable object, which then calls its observers. An object must be made observable before being frozen, and our track function does both for you.
The observable object always points to the newest copy of the "base state" (which is whatever object you passed to track). This means you get the power of immutability and observability.
The track function always returns the same value you passed in. All it does is tag the given value and any nested objects/arrays with observable objects.
But wait, there's more! The guide is a must-read.
Contributors wanted!
MIT License
Copyright (c) Alec Larson
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