mixin.js

   1 'use strict';
   2
   3 var value = require('./valid-value')
   4
   5   , defineProperty = Object.defineProperty
   6   , getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor
   7   , getOwnPropertyNames = Object.getOwnPropertyNames
   8   , getOwnPropertySymbols = Object.getOwnPropertySymbols;
   9
  10 module.exports = function (target, source) {
  11         var error, sourceObject = Object(value(source));
  12         target = Object(value(target));
  13         getOwnPropertyNames(sourceObject).forEach(function (name) {
  14                 try {
  15                         defineProperty(target, name, getOwnPropertyDescriptor(source, name));
  16                 } catch (e) { error = e; }
  17         });
  18         if (typeof getOwnPropertySymbols === 'function') {
  19                 getOwnPropertySymbols(sourceObject).forEach(function (symbol) {
  20                         try {
  21                                 defineProperty(target, symbol, getOwnPropertyDescriptor(source, symbol));
  22                         } catch (e) { error = e; }
  23                 });
  24         }
  25         if (error !== undefined) throw error;
  26         return target;
  27 };