merge()

Merges multiple stores of the same type; the output holds the latest value from whichever source emitted last.

Signature

function merge<T>(...sources: Store<T>[]): Store<T | undefined>

Parameters

Parameter	Type	Description
sources	Store<T>[]	Two or more Store<T> inputs.

Returns

Store<T | undefined> — multi-dep Tier 1 node with bitmask dirty tracking.

Basic Usage

import { state } from 'callbag-recharge';
import { merge } from 'callbag-recharge/extra';

const a = state(1);
const b = state(2);
const m = merge(a, b);
a.set(10);
m.get(); // 10

Options / Behavior Details

• Concurrent dirty: Multiple deps dirty in one batch can yield multiple DATA without extra DIRTY; downstream handles per library rules.
• Completion: Completes when all sources have completed without error.

See Also

• combine
• race — first source to emit wins