The corresponding EditorCongig property is charset.
The backend ESLint rule is unicode-bom
Unlike other rules, this plugin works only when utf-8 or utf-8-bom is specified. If other value is specified in .editorconfig, ESLint does not verify charset. ESLint only verifies if BOM is specified or not.
If you set charset = utf-8 in .editorconfig, the files cannot include a BOM.
If you set charset = utf-8-bom in .editorconfig, the files must include a BOM.
If you don't set charset in .editorconfig or set charset = unset, this rule is disabled.
None
If you use some UTF-16 or UTF-32 files and you want to allow a file to optionally begin with a Unicode BOM, you should turn this rule off.