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docs(proxy): fix typo

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ruanyf 2017-11-08 09:38:07 +08:00
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docs/proxy.md
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@ -872,7 +872,7 @@ Object.getOwnPropertyNames(p)
// Uncaught TypeError: 'ownKeys' on proxy: trap returned extra keys but proxy target is non-extensible
```
上面代码中，`Obj`对象是不可扩展的，这时`ownKeys`方法返回的数组之中，包含了`obj`对象的多余属性`b`，所以导致了报错。
上面代码中，`obj`对象是不可扩展的，这时`ownKeys`方法返回的数组之中，包含了`obj`对象的多余属性`b`，所以导致了报错。
### preventExtensions()