61 lines
1.5 KiB
JavaScript
61 lines
1.5 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2021 The Stdlib Authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
// MODULES //
|
|
|
|
var nativeClass = require( '@stdlib/utils/native-class' );
|
|
|
|
|
|
// VARIABLES //
|
|
|
|
var hasDataView = ( typeof DataView === 'function' ); // eslint-disable-line stdlib/require-globals
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Tests if a value is a `DataView`.
|
|
*
|
|
* @param {*} value - value to test
|
|
* @returns {boolean} boolean indicating whether value is a DataView
|
|
*
|
|
* @example
|
|
* var ArrayBuffer = require( '@stdlib/array/buffer' );
|
|
* var DataView = require( '@stdlib/array/dataview' );
|
|
*
|
|
* var bool = isDataView( new DataView( new ArrayBuffer( 10 ) ) );
|
|
* // returns true
|
|
*
|
|
* @example
|
|
* var bool = isDataView( [] );
|
|
* // returns false
|
|
*/
|
|
function isDataView( value ) {
|
|
return (
|
|
( hasDataView && value instanceof DataView ) || // eslint-disable-line stdlib/require-globals
|
|
nativeClass( value ) === '[object DataView]'
|
|
);
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = isDataView;
|