Function createFiber

dash/deps/react-dom@18.3.1.js:28162–28165

(tag, pendingProps, key, mode)

  var createFiber = function (tag, pendingProps, key, mode) {
    // $FlowFixMe: the shapes are exact here but Flow doesn't like constructors
    return new FiberNode(tag, pendingProps, key, mode);
  };

  function shouldConstruct$1(Component) {
    var prototype = Component.prototype;