export function createResizeObserver(targetWindow, callback) { // https://github.com/jsdom/jsdom/issues/3368 // Add the polyfill here so it is not needed for all unit tests that leverage positioning if (process.env.NODE_ENV === 'test') { targetWindow.ResizeObserver = class ResizeObserver { observe() { // do nothing } unobserve() { // do nothing } disconnect() { // do nothing } }; } return new targetWindow.ResizeObserver(callback); }