77 lines
1.8 KiB
JavaScript
77 lines
1.8 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';
|
|
|
|
// MODULES //
|
|
|
|
var hasOwnProp = require( '@stdlib/assert-has-own-property' );
|
|
var indexOf = require( '@stdlib/utils-index-of' );
|
|
var typeOf = require( '@stdlib/utils-type-of' );
|
|
var isConstructorPrototype = require( './is_constructor_prototype.js' );
|
|
var EXCLUDED_KEYS = require( './excluded_keys.json' );
|
|
var win = require( './window.js' );
|
|
|
|
|
|
// VARIABLES //
|
|
|
|
var bool;
|
|
|
|
|
|
// FUNCTIONS //
|
|
|
|
/**
|
|
* Determines whether an environment throws when comparing to the prototype of a value's constructor (e.g., [IE9][1]).
|
|
*
|
|
* [1]: https://stackoverflow.com/questions/7688070/why-is-comparing-the-constructor-property-of-two-windows-unreliable
|
|
*
|
|
* @private
|
|
* @returns {boolean} boolean indicating whether an environment is buggy
|
|
*/
|
|
function check() {
|
|
var k;
|
|
if ( typeOf( win ) === 'undefined' ) {
|
|
return false;
|
|
}
|
|
for ( k in win ) { // eslint-disable-line guard-for-in
|
|
try {
|
|
if (
|
|
indexOf( EXCLUDED_KEYS, k ) === -1 &&
|
|
hasOwnProp( win, k ) &&
|
|
win[ k ] !== null &&
|
|
typeOf( win[ k ] ) === 'object'
|
|
) {
|
|
isConstructorPrototype( win[ k ] );
|
|
}
|
|
} catch ( err ) { // eslint-disable-line no-unused-vars
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
// MAIN //
|
|
|
|
bool = check();
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = bool;
|