create-adaptable-composable

# Create Adaptable Composable Adaptable composables are reusable functions that can accept both reactive and non-reactive inputs. This allows developers to use the composable in a variety of contexts without worrying about the reactivity of the inputs. Steps to design an adaptable composable in Vue.js: 1. Confirm the composable's purpose and API design and expected inputs/outputs. 2. Identify inputs params that should be reactive (MaybeRef / MaybeRefOrGetter). 3. Use `toValue()` or `toRef()` to normalize inputs inside reactive effects. 4. Implement the core logic of the composable using Vue's reactivity APIs. ## Core Type Concepts ### Type Utilities ```ts /** * value or writable ref (value/ref/shallowRef/writable computed) */ export type MaybeRef<T = any> = T | Ref<T> | ShallowRef<T> | WritableComputedRef<T>; /** * MaybeRef<T> + ComputedRef<T> + () => T */ export type MaybeRefOrGetter<T = any> = MaybeRef<T> | ComputedRef<T> | (() => T); ``` ### Policy and Rules - Read-only, computed-friendly input: use `MaybeRefOrGetter` - Needs to be writable / two-way input: use `MaybeRef` - Parameter might be a function value (callback/predicate/comparator): do not use `MaybeRefOrGetter`, or you may accidentally invoke it as a getter. - DOM/Element targets: if you want computed/derived targets, use `MaybeRefOrGetter`. When `MaybeRefOrGetter` or `MaybeRef` is used: - resolve reactive value using `toRef()` (e.g. watcher source) - resolve non-reactive value using `toValue()` ##...