Drafts

createDraft seed returns an Editable<'T> whose local edit stays in force until Reset (). Use it for input that should survive a reload, and use editable values when a new upstream value should replace the edit.

let upstream = createSignal "Ada"
let name = createDraft (fun _ -> upstream.Value)
name.Value <- "Grace"
upstream.Value <- "Katherine"
// name.Value is "Grace"; name.Upstream is "Katherine".
name.Reset ()
// name.Value is now "Katherine".

Value and IsEdited are tracked reads. Upstream exposes the seed independently of the edit; Peek reads the stored value without refreshing it. The seed is a pure derivation and receives its own previous value, as on Memos.

Pending and failed seeds

An edited draft continues to display its edit when the seed is pending or failed. Without an edit, it follows the seed's pending or failed state. Resetting reveals that upstream state.

The editable replay compares both behaviors on the same upstream changes. See Forms for multiple fields and batched resets.

C#

Reactive.Draft(() => …) creates a draft over a Func<T> seed.