web standards - Should Javascript files include the BOM or not? - Stack Overflow

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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.

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.

• javascript
• web-standards
• byte-order-mark

Share Improve this question Follow asked Mar 27, 2013 at 21:04 Andrew ThekenAndrew Theken 3,49011 gold badge3333 silver badges5555 bronze badges 2

• 2 stackoverflow./a/2223926 An answer that is unspecific to JS, but might be relevant. – Jon Sykes Commented Mar 28, 2013 at 12:37
• A related issue, here, where browsers are confused about the encoding of a javascript resource: stackoverflow./questions/52102142/… – Christopher Schultz Commented Aug 30, 2018 at 17:10

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Sorted by: Reset to default 7

Wikipedia has a good explanation of why NOT to include a BOM with UT8.

http://en.wikipedia/wiki/Byte_order_mark#cite_note-3

"Use of a BOM is neither required nor remended 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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