要做到这一点，你必须使用的 JSObject 。它已经存在很长一段时间，虽然我听说可以有浏览器仍然之间的差异。所以，如果你需要支持许多浏览器我建议在您的支持组检查，一旦你看到它在工作之一。

To do this, you must use JSObject. It's been around for a long time, although I hear there can be differences between browsers still. So if you need to support many browsers I'd suggest checking across your supported set once you see it work in one.

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