Function moveCallToHandlerPhase

code/styling/public/app.js:10604–10628

(current, workInProgress, renderExpirationTime)

  }

  function moveCallToHandlerPhase(current, workInProgress, renderExpirationTime) {
    var props = workInProgress.memoizedProps;
    !props ? invariant(false, 'Should be resolved by now. This error is likely caused by a bug in React. Please file an issue.') : void 0;

    // First step of the call has completed. Now we need to do the second.
    // TODO: It would be nice to have a multi stage call represented by a
    // single component, or at least tail call optimize nested ones. Currently
    // that requires additional fields that we don't want to add to the fiber.
    // So this requires nested handlers.
    // Note: This doesn't mutate the alternate node. I don't think it needs to
    // since this stage is reset for every pass.
    workInProgress.tag = CallHandlerPhase;

    // Build up the returns.
    // TODO: Compare this to a generator or opaque helpers like Children.
    var returns = [];
    appendAllReturns(returns, workInProgress);
    var fn = props.handler;
    var childProps = props.props;
    var nextChildren = fn(childProps, returns);

    var currentFirstChild = current !== null ? current.child : null;
    workInProgress.child = reconcileChildFibers(workInProgress, currentFirstChild, nextChildren, renderExpirationTime);
    return workInProgress.child;
  }

  function appendAllChildren(parent, workInProgress) {
    // We only have the top Fiber that was created but we need recurse down its