Computed

Extends Signal<Value, Diff>.

A computed signal created via computed.

interface Computed<Value, Diff = unknown> extends Signal<Value, Diff> {}

Properties

Whether this computed child is involved in an actively-running effect graph.

readonly isActivelyListening: boolean

The epoch when this signal's value last changed. Note that this is not the same as when the value was last computed. A signal may recompute it's value without changing it.

lastChangedEpoch: number

The name of the signal. This is used at runtime for debugging and perf profiling only. It does not need to be globally unique.

name: string

Methods

The current value of the signal. This is a reactive value, and will update when the signal changes. Any computed signal that depends on this signal will be lazily recomputed if this signal changes. Any effect that depends on this signal will be rescheduled if this signal changes.

Returns the sequence of diffs between the the value at the given epoch and the current value. Returns the RESET_VALUE constant if there is not enough information to compute the diff sequence.

Parameters

number

Returns

Diff[] | RESET_VALUE