[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [\_Promise](./rc-js-util._promise.md) > [rejectNull](./rc-js-util._promise.rejectnull.md) ## \_Promise.rejectNull property Returns a Promise of rejection with the supplied error if the value is `null` or `undefined`. **Signature:** ```typescript static readonly rejectNull: typeof promiseRejectNull; ``` ## Remarks See [promiseRejectNull()](./rc-js-util.promiserejectnull.md).