blocks|key|3575408|text|你能得到的最好的是github:+GoogleChrome/proxy-polyfill|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3575409|根据Babel+docs的说法|3575410|3575411|由于ES5的限制，代理不能被转译或多填充。|blockquote|3575412|3575413|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/GoogleChrome/proxy-polyfill|1|https://babeljs.io/learn-es2015/#ecmascript-2015-features-proxies^0|9|Z|0|0|2|A|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|F|3|-4|5|6|7|12|8|@]|9|@]|C|$]]|$1|G|3|H|5|I|7|13|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|14|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

Best you can get is <a href="https://github.com/GoogleChrome/proxy-polyfill" rel="noreferrer">github: GoogleChrome/proxy-polyfill</a>

According to <a href="https://babeljs.io/learn-es2015/#ecmascript-2015-features-proxies" rel="noreferrer">Babel docs</a>:

<blockquote>
 Due to the limitations of ES5, Proxies cannot be transpiled or polyfilled. 
</blockquote>

blocks|key|468700|text|在不支持此功能的环境中直接解决polyfill+ES6代理，当然是不可能的-如果存储一些polyfill功能信息window.Proxy是不可能的。但是如果这样想的话，ES6的大多数现代特性都不能被支持，因为它们会给老版本的ECMAScript引擎带来语法错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|468701|这就是为什么你应该使用转译器，它在前面将ES6代码包装成特定的结构，然后在旧引擎上评估转换后的代码。在当前情况下，只需使用一个Babel插件：https://www.npmjs.com/package/babel-plugin-proxy|offset|length|468702|当然，在使用此解决方案时，您应该将Webpack配置为根据其功能集发现来为不同的客户端代理/浏览器隔离目标包。详情请看这里：https://gist.github.com/newyankeecodeshop/79f3e1348a09583faf62ed55b58d09d9|468703|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/babel-plugin-proxy|1|https://gist.github.com/newyankeecodeshop/79f3e1348a09583faf62ed55b58d09d9^0|0|1Z|1C|0|0|1Q|22|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]|P|$5|K|L|M|A|$N|Q]]]]

Direct solution for polyfilling ES6 Proxy in environments without support this feature, of course is impossible - if storing some polyfill function info window.Proxy is meant. But if thinking this way, most modern features of ES6 can't be supported, because they will raise syntax error for old-version ECMAScript engine.

That's why you should use transpiler, which perform preceding wrapping ES6 code into specific constructions, and then evaluate transformed code on old engine. In current case, just use one Babel plugin: <a href="https://www.npmjs.com/package/babel-plugin-proxy" rel="nofollow noreferrer">https://www.npmjs.com/package/babel-plugin-proxy</a>

Of course, while using this solution, you should configure Webpack to segregate target bundles for different client agents / browsers, depending on it's feature set discovery. See details here: <a href="https://gist.github.com/newyankeecodeshop/79f3e1348a09583faf62ed55b58d09d9" rel="nofollow noreferrer">https://gist.github.com/newyankeecodeshop/79f3e1348a09583faf62ed55b58d09d9</a>

blocks|key|468708|text|有一个相当简明的answer+for+this+question+on+Quora|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|468709|468710|代理需要引擎级别的支持，并且不可能填充代理。|blockquote|468711|468712|大多数主要的JS引擎还没有实现支持。查看ECMAScript+6+compatibility+table。|468713|你可能想要使用Object.observe来代替，可能在Chrome以外的浏览器上使用polyfills，但即使这样，该提议也已经被撤回，并宣布将在未来的版本中将其从Chrome中删除。|468714|468715|我个人还没有尝试过Object.observe解决方案，但它可能是一个很好的起点。|468716|祝好运!|468717|编辑：感谢Matt+Jensen在评论中指出，实际上有一种方法可以使用这个包来填充ES6代理的某些部分：github.com/GoogleChrome/proxy-polyfill|style|BOLD|468718|太棒了|468719|entityMap|0|LINK|mutability|MUTABLE|url|https://www.quora.com/Is-there-a-way-to-implement-a-ES6-proxy-under-ES5|1|https://kangax.github.io/compat-table/es6/|2|http://github.com/GoogleChrome/proxy-polyfill^0|8|X|0|0|0|0|0|K|W|1|0|0|0|0|0|0|3|1G|12|2|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@]|9|@$A|1A|B|1B|1|1C]]|C|$]]|$1|D|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|1E|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|1F|8|@]|9|@]|C|$]]|$1|I|3|J|5|6|7|1G|8|@]|9|@$A|1H|B|1I|1|1J]]|C|$]]|$1|K|3|L|5|6|7|1K|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|1L|8|@]|9|@]|C|$]]|$1|N|3|O|5|6|7|1M|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|1N|8|@]|9|@]|C|$]]|$1|R|3|S|5|6|7|1O|8|@$A|1P|B|1Q|T|U]]|9|@$A|1R|B|1S|1|1T]]|C|$]]|$1|V|3|W|5|6|7|1U|8|@]|9|@]|C|$]]|$1|X|3|-4|5|6|7|1V|8|@]|9|@]|C|$]]]|Y|$Z|$5|10|11|12|C|$13|14]]|15|$5|10|11|12|C|$13|16]]|17|$5|10|11|12|C|$13|18]]]]

There's quite a concise <a href="https://www.quora.com/Is-there-a-way-to-implement-a-ES6-proxy-under-ES5" rel="nofollow noreferrer">answer for this question on Quora</a>
<blockquote>
Proxies require support on the engine level and it is not possible to polyfill Proxy.
Most major JS engines have yet to implement support. Check out the <a href="https://kangax.github.io/compat-table/es6/" rel="nofollow noreferrer">ECMAScript 6 compatibility table</a>.
You may want to use Object.observe instead, possibly with polyfills for browsers other than Chrome, but even then the proposal has been withdrawn, and it has been announced it will be removed from Chrome in a future version.
</blockquote>
I personally haven't tried the Object.observe solution but it might be a good place to start.
Good luck!
EDIT:
Thank you to Matt Jensen in the comments for pointing out there is infact a way to polyfill some parts of ES6 Proxy using this package: <a href="http://github.com/GoogleChrome/proxy-polyfill" rel="nofollow noreferrer">github.com/GoogleChrome/proxy-polyfill</a>
AWESOME

IE11 does not and will not implement ES2015 Proxy objects. Yet IE11's end of extended support is October 14, 2025.

Is there any way to polyfill Proxy objects for IE11? All other browsers support Proxy already.

If yes then we would all be able to use it in production today. If not then we'll have to wait almost a decade...

Edit: I'm asking specifically for IE11 as I know IE to usually have IE specific features that I'm often not aware of.

Edit2: I'm particularly interested in being able to implement a catch-all interceptor. Similar to <code>__getattr__</code> in Python. It only has to work in IE11.

ES6 Proxy Polyfill for IE11

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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IE11不会也不会实现ES2015代理对象。然而，IE11的扩展支持将于2025年10月14日结束。有没有什么方法可以为IE11填充代理对象？所有其他浏览器都已经支持代理了。如果是，那么我们今天都可以在生产中使用它。如果不是，我们将不得不等待近十年……编辑:我特别要求IE11，因为我知道IE通常具有我通常不知道的IE特...

问用于IE11的ES6代理Polyfill
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