[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [\_Promise](./rc-js-util._promise.md) ## \_Promise class Utilities for handling promises. **Signature:** ```typescript export declare class _Promise ``` ## Properties

Property	Modifiers	Type	Description
[delay](./rc-js-util._promise.delay.md)	`static` `readonly`	typeof promiseDelay	Returns a `Promise` which will resolve to `resolveWith` after a delay of `delay` (in milliseconds).
[poll](./rc-js-util._promise.poll.md)	`static` `readonly`	typeof promisePoll
[rejectFalse](./rc-js-util._promise.rejectfalse.md)	`static` `readonly`	typeof promiseRejectFalse	Returns a Promise of rejection with the supplied error if the `value` is false.
[rejectFalsey](./rc-js-util._promise.rejectfalsey.md)	`static` `readonly`	typeof promiseRejectFalsey	Returns a Promise of rejection with the supplied error if the `value` is falsy.
[rejectNull](./rc-js-util._promise.rejectnull.md)	`static` `readonly`	typeof promiseRejectNull	Returns a Promise of rejection with the supplied error if the value is `null` or `undefined`.