scroll action in oneref-flux-challenge

scrollAction.js

export function scroll(scrollAmount,updater) {
  updater((prevState) => {
    const {nextState, oldRequests} = prevState.scrollAdjust(scrollAmount);
    oldRequests.forEach((req) => req.abort());  // cancel old requests
    // Need invokeLater since we're within updater
    invokeLater(() => fillView(nextState,updater));
    return nextState;
  });
}