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* @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 propertyDescriptor = require( '@stdlib/utils/property-descriptor' );
// MAIN //
/**
* Tests if an object's own property is writable.
*
* @param {*} value - value to test
* @param {*} property - property to test
* @returns {boolean} boolean indicating if an object property is writable
*
* @example
* var defineProperty = require( '@stdlib/utils/define-property' );
*
* var obj = {
* 'boop': true
* };
*
* defineProperty( obj, 'beep', {
* 'configurable': false,
* 'enumerable': false,
* 'writable': false,
* 'value': 'beep'
* });
*
* var bool = isWritableProperty( obj, 'boop' );
* // returns true
*
* bool = isWritableProperty( obj, 'beep' );
* // returns false
*/
function isWritableProperty( value, property ) {
var desc = propertyDescriptor( value, property );
return (
desc !== null &&
(
desc.writable === true ||
typeof desc.set === 'function'
)
);
}
// EXPORTS //
module.exports = isWritableProperty;
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