solidjs-core

SolidJS reactivity uses signals to store state and effects to react to signal changes. This skill explains how createSignal and createEffect enable fine-grained updates by tracking reactive reads within specific scopes.

To implement createSignal and createEffect in a SolidJS component, you create a signal for state and an effect to observe it. This skill demonstrates how to build interactive UI logic that responds instantly to state changes.

You should use createMemo instead of createSignal in SolidJS when you need to derive computed values. This skill clarifies how memos cache derived state and interact with the single-run component model for predictable UI updates.

Untrack in SolidJS prevents the reactive system from tracking signal reads within a specific scope. This skill covers how to use untrack alongside ownership and cleanup rules to control precise reactivity in your app.

Yes, you can use SolidJS fine-grained reactivity for small to medium apps. This skill applies the core reactivity model, including signals, effects, and onCleanup disposal, to build interactive components with predictable updates.

A SolidJS effect might not trigger if signal reads occur outside tracking scopes or are explicitly untracked. This skill explains the single-run component model and how precise tracking ensures effects respond to state changes.