Function appendInitialChild

docs/external/js/react-dom.development.js:7618–7620

(parentInstance, child)

    return domElement;
  }
  function appendInitialChild(parentInstance, child) {
    parentInstance.appendChild(child);
  }
  function finalizeInitialChildren(domElement, type, props, rootContainerInstance, hostContext) {
    setInitialProperties(domElement, type, props, rootContainerInstance);
    return shouldAutoFocusHostComponent(type, props);