Function __update

Exports the local mutation primitive.

__update<T>(
    listIndex: number,
    listValues: T[],
    replica: CRListState<T>,
    mode: "overwrite" | "before" | "after",
): false | { change: CRListChange<T>; delta: CRListDelta<T> }
Applies a local value mutation to the replica live view.

The update can replace a range starting at the target item, insert values before it, or insert values after it. The returned delta is suitable for gossip and the returned change describes the local live-view patch.
Type Parameters
- T
Parameters
- listIndex: number
  Target index in the live list.
- listValues: T[]
  Values to insert or overwrite.
- replica: CRListState<T>
  Replica to mutate.
- mode: "overwrite" | "before" | "after"
  Mutation mode relative to listIndex.
Returns false | { change: CRListChange<T>; delta: CRListDelta<T> }
- A local change and gossip delta, or false if no mutation occurred.
- Defined in src/core/crud/update/index.ts:28