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/*! |
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* inherits.js | v0.2.0 | Easily inherit prototypes. |
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* Copyright (c) 2017 Eric Zieger (MIT license) |
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* https://github.com/theZieger/inherits.js/blob/master/LICENSE |
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* |
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* inherit the prototype of the SuperConstructor |
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* |
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* Warning: Changing the prototype of an object is, by the nature of how |
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* modern JavaScript engines optimize property accesses, a very slow |
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* operation, in every browser and JavaScript engine. So instead of using |
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* Object.setPrototypeOf or messing with __proto__, we create a new object |
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* with the desired prototype using Object.create(). |
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* |
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* @see https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Object/setPrototypeOf |
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* |
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* @param {Object} Constructor |
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* @param {Object} SuperConstructor |
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* |
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* @throws {TypeError} if arguments are `null`, `undefined`, or |
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* `SuperConstructor` has no prototype |
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* |
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* @returns {Void} |
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*/ |
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module.exports = function(Constructor, SuperConstructor) { |
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if (Constructor === undefined || Constructor === null) { |
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throw new TypeError('Constructor argument is undefined or null'); |
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} |
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if (SuperConstructor === undefined || SuperConstructor === null) { |
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throw new TypeError('SuperConstructor argument is undefined or null'); |
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} |
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if (SuperConstructor.prototype === undefined) { |
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throw new TypeError('SuperConstructor.prototype is undefined'); |
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} |
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/** |
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* for convenience, `SuperConstructor` will be accessible through the |
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* `Constructor.super_` property |
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*/ |
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Constructor.super_ = SuperConstructor; |
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Constructor.prototype = Object.create(SuperConstructor.prototype); |
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Constructor.prototype.constructor = Constructor; |
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}; |
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theZieger /
inherits.js
