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I believe that most people suggest using UTF-8 as the encoding for Javascript files.
Is there a standard about whether those files include the Byte-Order Mark, or do not included it? (i.e. Should JS files be served with/without the UTF-8 BOM?)
I'd like to see an RFC, or a "de facto" standard of this, and not so much an opinion of which is preferred by individuals.
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BOM use is optional. Its presence interferes with the use of UTF-8 by software that does not expect non-ASCII bytes at the start of a file but that could otherwise handle the text stream.
In the UTF-8 encoding, the presence of the BOM is not essential because, unlike the UTF-16 or UTF-32 encodings, there is no alternative sequence of bytes in a character. The BOM may still occur in UTF-8 encoding text, however, either as a by-product of an encoding conversion or because it was added by an editor.
Open the file you want to verify/fix in Notepad++ In the top menu select Encoding > Convert to UTF-8 (option without BOM) Save the file.
A byte order mark (BOM) is a sequence of bytes used to indicate Unicode encoding of a text file. The underlying character code, U+FEFF , takes one of the following forms depending on the character encoding. Bytes. Encoding Form. EF BB BF.
Wikipedia has a good explanation of why NOT to include a BOM with UT8.
http://en.wikipedia.org/wiki/Byte_order_mark#cite_note-3
"Use of a BOM is neither required nor recommended for UTF-8, but may be encountered in contexts where UTF-8 data is converted from other encoding forms that use a BOM or where the BOM is used as a UTF-8 signature"
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