Function getValidTagName

packages/rrdom/src/index.ts:202–208

(element: HTMLElement)

  K extends keyof RRElementTagNameMap ? RRElementTagNameMap[K] : RRElement;

function getValidTagName(element: HTMLElement): string {
  // https://github.com/rrweb-io/rrweb-snapshot/issues/56
  if (element instanceof HTMLFormElement) {
    return 'FORM';
  }
  return element.tagName.toUpperCase();
}

/**
 * Build a RRNode from a real Node.