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merge-descripe简单实现属性继承 from： https://github.com/component/merge-descriptors
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| module.exports = function (dest, src) { | |
| Object.getOwnPropertyNames(src).forEach(function (name) { | |
| var descriptor = Object.getOwnPropertyDescriptor(src, name) | |
| Object.defineProperty(dest, name, descriptor) | |
| }) | |
| return dest | |
| } | |
| // called | |
| var thing = { | |
| get name() { | |
| return 'jon' | |
| } | |
| } | |
| var animal = { | |
| } | |
| merge(animal, thing) | |
| animal.name === 'jon' |
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