Function isJS

src/js/utils/fileUtils.js:118–140

(bufferContents)

};

export const isJS = (bufferContents) => {
  const isSavedFile = ORIGINAL_FILE_PATH !== '?';
  const useEditorFileSyntaxForDeterminingFileType = EDITOR_FILE_SYNTAX !== '?';

  const isAllowedExtension = hasAllowedFileExtension('js', ORIGINAL_FILE_PATH);
  const isAllowedSyntax = hasAllowedFileSyntax('js', EDITOR_FILE_SYNTAX);
  const isDisallowedFilePattern = hasDisallowedFilePathPattern('js', ORIGINAL_FILE_PATH);
  const isMaybeJs = !bufferContents.match(/^\s*</);

  if (!isSavedFile) {
    return useEditorFileSyntaxForDeterminingFileType
      ? isAllowedSyntax || isMaybeJs
      : isMaybeJs;
  }

  if (isDisallowedFilePattern) {
    return false;
  }

  return useEditorFileSyntaxForDeterminingFileType
    ? isAllowedSyntax || isAllowedExtension
    : isAllowedExtension;
};

// Checks if a file path matches a particular glob string.
export const isMatchingGlob = (globString) => {