fix: polyfill 使用if判断，有些环境使用Object.freeze冻结原型会抛出异常

hiloteam / Hilo

A Cross-end HTML5 Game development solution

https://hiloteam.github.io/

MIT License

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Closed steel1990 closed 7 years ago

steel1990 commented 7 years ago

比如weex环境下。。

CLAassistant commented 7 years ago

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