# isBigInt
> Test if a value is a [BigInt][mdn-bigint].
## Usage
```javascript
var isBigInt = require( '@stdlib/assert/is-bigint' );
```
#### isBigInt( value )
Tests if a value is a [`BigInt`][mdn-bigint].
```javascript
var BigInt = require( '@stdlib/bigint/ctor' );
var bool = isBigInt( BigInt( '1' ) );
// returns true
bool = isBigInt( Object( BigInt( '1' ) ) );
// returns true
```
#### isBigInt.isPrimitive( value )
Tests if a `value` is a primitive [`BigInt`][mdn-bigint].
```javascript
var BigInt = require( '@stdlib/bigint/ctor' );
var bool = isBigInt.isPrimitive( BigInt( '1' ) );
// returns true
bool = isBigInt.isPrimitive( Object( BigInt( '1' ) ) );
// returns false
```
#### isBigInt.isObject( value )
Tests if a `value` is a [`BigInt`][mdn-bigint] object.
```javascript
var BigInt = require( '@stdlib/bigint/ctor' );
var bool = isBigInt.isObject( BigInt( '1' ) );
// returns false
bool = isBigInt.isObject( Object( BigInt( '1' ) ) );
// returns true
```
## Examples
```javascript
var hasBigIntSupport = require( '@stdlib/assert/has-bigint-support' );
var BigInt = require( '@stdlib/bigint/ctor' );
var isBigInt = require( '@stdlib/assert/is-bigint' );
var bool;
if ( hasBigIntSupport() ) {
bool = isBigInt( BigInt( '1' ) );
// returns true
} else {
console.log( 'Environment does not support BigInts.' );
}
bool = isBigInt( 1 );
// returns false
bool = isBigInt( '1' );
// returns false
bool = isBigInt( {} );
// returns false
bool = isBigInt( [] );
// returns false
bool = isBigInt( null );
// returns false
bool = isBigInt( void 0 );
// returns false
bool = isBigInt( true );
// returns false
bool = isBigInt( function foo() {} );
// returns false
```
[mdn-bigint]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt