Golang determines whether js file exists

go languageTo detect whether the file exists, first create a FileInfo. If no error is reported, then check whether it is a directory through IsDir()

Code As follows:

finfo, err := os.Stat("filename.js")
if err != nil {
    // no such file or dir
    return
}
if finfo.IsDir() {
    // it's a file
} else {
    // it's a directory
}

The method for golang to determine whether a file or folder exists is to use the error value returned by the os.Stat() function to determine:

1. If the returned error is nil, explain The file or folder exists

2. If the error type returned is true using os.IsNotExist(), it means the file or folder does not exist

3. If the error type returned is other types , then you are not sure whether it exists.

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