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deno fmt - remove UTF-8 BOM instead of maintaining it #29790

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#29796
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deno fmt - remove UTF-8 BOM instead of maintaining it#29790
feat
#29796
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deno fmtRelated to the "deno fmt" subcommand or dprintgood first issueGood for newcomers
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2.4.0
@dsherret

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@dsherret
dsherret
opened on Jun 17, 2025

We should remove the UTF-8 BOM in deno fmt. It's bad to have in the file because it causes some overhead. Right now it causes an additional allocation in order to strip the BOM and also it causes the loaded text to differ from the bytes, which may cause slight memory increase in some cases (ex. with the new text imports)

Right now it preserves it:

deno/cli/tools/fmt.rs

Line 1612 in bc74fad

file_contents.text.insert(0, '\u{FEFF}');

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    deno fmtRelated to the "deno fmt" subcommand or dprintgood first issueGood for newcomers

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