Function createElementWithFiber

package/src/utils/react-detection.test.ts:41–52

(
  fiber: MockFiber,
  options: { className?: string } = {},
)

// Helper to create element with fiber attached
function createElementWithFiber(
  fiber: MockFiber,
  options: { className?: string } = {},
) {
  const element = document.createElement("div");
  if (options.className) {
    element.className = options.className;
  }
  attachFiber(element, fiber);
  document.body.appendChild(element);
  return element;
}

describe("react-detection", () => {
  beforeEach(() => {