main.js (1495B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2021 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var nativeClass = require( '@stdlib/utils/native-class' ); 24 25 26 // VARIABLES // 27 28 var hasDataView = ( typeof DataView === 'function' ); // eslint-disable-line stdlib/require-globals 29 30 31 // MAIN // 32 33 /** 34 * Tests if a value is a `DataView`. 35 * 36 * @param {*} value - value to test 37 * @returns {boolean} boolean indicating whether value is a DataView 38 * 39 * @example 40 * var ArrayBuffer = require( '@stdlib/array/buffer' ); 41 * var DataView = require( '@stdlib/array/dataview' ); 42 * 43 * var bool = isDataView( new DataView( new ArrayBuffer( 10 ) ) ); 44 * // returns true 45 * 46 * @example 47 * var bool = isDataView( [] ); 48 * // returns false 49 */ 50 function isDataView( value ) { 51 return ( 52 ( hasDataView && value instanceof DataView ) || // eslint-disable-line stdlib/require-globals 53 nativeClass( value ) === '[object DataView]' 54 ); 55 } 56 57 58 // EXPORTS // 59 60 module.exports = isDataView;