combine()

Builds a tuple store from multiple sources; updates when any dep changes (multi-dep Tier 1).

Signature

function combine<Sources extends Store<unknown>[]>(
	...sources: Sources
): Store<{ [K in keyof Sources]: Sources[K] extends Store<infer T> ? T : never }>

Parameters

Parameter	Type	Description
sources	Sources	Stores whose values become tuple elements in order.

Returns

Store<[...]> — typed tuple of each store’s T.

Basic Usage

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

const a = state(1);
const b = state(2);
const c = combine(a, b);
c.get(); // [1, 2]

Options / Behavior Details

• New array: Each recompute uses a fresh tuple reference.
• Fail-fast: Terminates when any source ends (error or completion).

See Also

• merge
• withLatestFrom — latest value from secondary sources