@atlaskit/app-provider/dist/es2019/scrollbar-harmonisation/install-document-attribute.js

A top level provider for the Design System.

/**
 * Enables a document attribute with reference-counted cleanup.
 */
export function installDocumentAttribute(targetDocument, attribute, controllers) {
  const existingController = controllers.get(targetDocument);
  if (existingController) {
    existingController.references += 1;
    let isReleased = false;
    return () => {
      if (isReleased) {
        return;
      }
      isReleased = true;
      existingController.references -= 1;
      if (existingController.references === 0) {
        existingController.release();
        controllers.delete(targetDocument);
      }
    };
  }
  const rootElement = targetDocument.documentElement;
  const controller = {
    references: 1,
    release: () => rootElement.removeAttribute(attribute)
  };
  rootElement.setAttribute(attribute, '');
  controllers.set(targetDocument, controller);
  let isReleased = false;
  return () => {
    if (isReleased) {
      return;
    }
    isReleased = true;
    controller.references -= 1;
    if (controller.references === 0) {
      controller.release();
      controllers.delete(targetDocument);
    }
  };
}