Wonder

The result of running in the browser is as follows:  The console says "Uncaught Error: Invalid magic number: 7B5B1CF0 @0".

I have the same problem 😒

```javascript interface SearchFunc { (source: string, subString: string): boolean; } let mySearch: SearchFunc = function(source: string, subString: string) { return source.search(subString) !== -1; } ``` 这里是不是省略了列出匿名函数返回值类型。 如果省略这点，那么编译器就是通过推断得出的类型而不是手动添加的吧？

hello, this feature is much needed~ I encountered the problem that the first-level directory cannot be deleted/renamed without using usePolling. But usePolling caused high CPU consumption.

Also meet this error. Can 'axios-cached-dns-resolve' export a function that allows users to change log method themselves? Like follow: ``` export function changeLogger(userLogger) { log = userLogger; } ```

感谢您的提议，我们后续有优化计划支持该表现~

您好，您的场景是：打开 cosbrowser 并未上传或下载文件，也并没有设置任何同步任务，只是开启着在后台运行。但是依旧有上行和下行速度？