DetectEncoding detect the encoding of content.

RemoveBOMIfPresent removes a UTF-8 BOM from a []byte.

ToUTF8 converts content to UTF8 encoding and ignore error.

ToUTF8DropErrors makes sure the return string is valid utf-8; attempts conversion if possible.

ToUTF8WithErr converts content to UTF8 encoding.

ToUTF8WithFallback detects the encoding of content and coverts to UTF-8 if possible.

UTF8BOM is the utf-8 byte-order marker.