[Home](./index.md) > [@apextoaster/js-utils](./js-utils.md) > [deferUntil](./js-utils.deferuntil.md) ## deferUntil() function Resolve if `cb` returns true within `max` tries, otherwise reject with a `TimeoutError`. Signature: ```typescript export declare function deferUntil(cb: PredicateC0, step: number, max: number): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | cb | PredicateC0 | | | step | number | | | max | number | | Returns: Promise<void> ## Exceptions TimeoutError