# isBetween()

Checks if `date` is between `fromDate` and `toDate`, where the match is inclusive.

## Signature

`isBetween(string | number | Date date, string | number | Date fromDate, string | number | Date toDate, string unit)`

## Parameters

***date*:** Type: `string | number | Date`. A datetime string in ISO8601 format, or a timestamp in milliseconds, or a `Date` object.

***fromDate*:** Type: `string | number | Date`. A datetime string in ISO8601 format, or a timestamp in milliseconds, or a `Date` object.

***toDate*:** Type: `string | number | Date`. A datetime string in ISO8601 format, or a timestamp in milliseconds, or a `Date` object.

***unit*:** Type: `string`. A datetime unit. Options are 'year', 'month', 'week', 'day', 'hour', 'minute', 'second', or 'millisecond'.

## Returns

**Type: `boolean`**

Returns `true` if `date` is between `fromDate` and `toDate`, or `false` otherwise.

## Sample Code

```javascript
// Returns true
$A.localizationService.isBetween("2017-03-07","March 7, 2017", "12/1/2017");
// Returns false
$A.localizationService.isBetween("2017-03-07 12:00", "March 7, 2017 15:00", "12/1/2017");
// Returns true because the unit is "day"
$A.localizationService.isBetween("2017-03-07 12:00", "March 7, 2017 15:00", "12/1/2017", "day");
```