File size: 453 Bytes
cf86710 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | # Function: isDateInterval()
> **isDateInterval**(`matcher`): `matcher is DateInterval`
Returns true if `matcher` is of type [DateInterval](../type-aliases/DateInterval.md).
## Parameters
| Parameter | Type |
| :------ | :------ |
| `matcher` | `unknown` |
## Returns
`matcher is DateInterval`
## Source
[src/types/Matchers.ts:93](https://github.com/gpbl/react-day-picker/blob/9ad13dc72fff814dcf720a62f6e3b5ea38e8af6d/src/types/Matchers.ts#L93)
|