main.js (1751B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 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 getPrototypeOf = require( '@stdlib/utils/get-prototype-of' ); 24 var typeOf = require( '@stdlib/utils/type-of' ); 25 var isError = require( './../../is-error' ); 26 27 28 // MAIN // 29 30 /** 31 * Tests if a value is a `RangeError` object. 32 * 33 * @param {*} value - value to test 34 * @returns {boolean} boolean indicating whether a value is a `RangeError` object 35 * 36 * @example 37 * var bool = isRangeError( new RangeError( 'beep' ) ); 38 * // returns true 39 * 40 * @example 41 * var bool = isRangeError( {} ); 42 * // returns false 43 */ 44 function isRangeError( value ) { 45 if ( typeof value !== 'object' || value === null ) { 46 return false; 47 } 48 // Check for `RangeError` objects from the same realm (same Node.js `vm` or same `Window` object)... 49 if ( value instanceof RangeError ) { 50 return true; 51 } 52 // All `RangeError` objects are `Error` objects... 53 if ( isError( value ) ) { 54 // Walk the prototype tree until we find the desired constructor... 55 while ( value ) { 56 if ( typeOf( value ) === 'rangeerror' ) { 57 return true; 58 } 59 value = getPrototypeOf( value ); 60 } 61 } 62 return false; 63 } 64 65 66 // EXPORTS // 67 68 module.exports = isRangeError;