Function printDecorators

src/language-js/print/decorators.js:37–67

(path, options, print)

}

function printDecorators(path, options, print) {
  const { node, parent } = path;
  const { decorators } = node;

  if (
    !isNonEmptyArray(decorators) ||
    // If the parent node is an export declaration and the decorator
    // was written before the export, the export will be responsible
    // for printing the decorators.
    hasDecoratorsBeforeExport(parent) ||
    // Decorators already printed in ignored node
    isIgnored(path)
  ) {
    return "";
  }

  const shouldBreak =
    node.type === "ClassExpression" ||
    node.type === "ClassDeclaration" ||
    hasNewlineBetweenOrAfterDecorators(node, options);

  return [
    path.key === "declaration" && isExportDeclaration(parent)
      ? hardline
      : shouldBreak
        ? breakParent
        : "",
    join(line, path.map(print, "decorators")),
    line,
  ];
}

function hasNewlineBetweenOrAfterDecorators(node, options) {
  return node.decorators.some((decorator) =>