66 lines
1.4 KiB
JavaScript
66 lines
1.4 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var hasToStringTag = require( '@stdlib/assert-has-tostringtag-support' );
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var nativeClass = require( '@stdlib/utils-native-class' );
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var test = require( './try2valueof.js' );
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// VARIABLES //
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var FLG = hasToStringTag();
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// MAIN //
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/**
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* Tests if a value is a string object.
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*
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* @param {*} value - value to test
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* @returns {boolean} boolean indicating if a value is a string object
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*
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* @example
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* var bool = isString( new String( 'beep' ) );
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* // returns true
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*
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* @example
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* var bool = isString( 'beep' );
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* // returns false
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*/
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function isString( value ) {
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if ( typeof value === 'object' ) {
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if ( value instanceof String ) {
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return true;
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}
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if ( FLG ) {
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return test( value );
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}
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return ( nativeClass( value ) === '[object String]' );
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}
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return false;
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}
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// EXPORTS //
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module.exports = isString;
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