[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [\_Equality](./rc-js-util._equality.md) > [areConsistentlyDefined](./rc-js-util._equality.areconsistentlydefined.md) ## \_Equality.areConsistentlyDefined property Returns true if both `A` and `B` are both null, undefined or 'defined'. Defined is not null and not undefined. **Signature:** ```typescript static areConsistentlyDefined: typeof equalityAreConsistentlyDefined; ``` ## Remarks See [equalityAreConsistentlyDefined()](./rc-js-util.equalityareconsistentlydefined.md).