63 lines
1.7 KiB
JavaScript
63 lines
1.7 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2018 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';
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Tests whether a value has in its prototype chain a specified constructor as a prototype property.
|
|
*
|
|
* @param {*} value - value to test
|
|
* @param {Function} constructor - constructor to test against
|
|
* @throws {TypeError} constructor must be callable
|
|
* @returns {boolean} boolean indicating whether a value is an instance of a provided constructor
|
|
*
|
|
* @example
|
|
* var bool = instanceOf( [], Array );
|
|
* // returns true
|
|
*
|
|
* @example
|
|
* var bool = instanceOf( {}, Object ); // exception
|
|
* // returns true
|
|
*
|
|
* @example
|
|
* var bool = instanceOf( 'beep', String );
|
|
* // returns false
|
|
*
|
|
* @example
|
|
* var bool = instanceOf( null, Object );
|
|
* // returns false
|
|
*
|
|
* @example
|
|
* var bool = instanceOf( 5, Object );
|
|
* // returns false
|
|
*/
|
|
function instanceOf( value, constructor ) {
|
|
// TODO: replace with `isCallable` check
|
|
if ( typeof constructor !== 'function' ) {
|
|
throw new TypeError( 'invalid argument. `constructor` argument must be callable. Value: `'+constructor+'`.' );
|
|
}
|
|
return ( value instanceof constructor );
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = instanceOf;
|