create-mixin/dist/index.js

Mix the prototype of one class into another

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = global || self, global.createMixin = factory());
}(this, (function () { 'use strict';

  /**
   * Creates a mixin for use in a class extends expression.
   * @module create-mixin
   */

  /**
   * @alias module:create-mixin
   * @param {class} Src - The class containing the behaviour you wish to mix into another class.
   * @returns {function}
   */
  function createMixin (Src) {
    return function (Base) {
      class Mixed extends Base {}
      for (const propName of Object.getOwnPropertyNames(Src.prototype)) {
        if (propName === 'constructor') continue
        Object.defineProperty(Mixed.prototype, propName, Object.getOwnPropertyDescriptor(Src.prototype, propName));
      }
      if (Src.prototype[Symbol.iterator]) {
        Object.defineProperty(Mixed.prototype, Symbol.iterator, Object.getOwnPropertyDescriptor(Src.prototype, Symbol.iterator));
      }
      return Mixed
    }
  }

  return createMixin;

})));