Function applyDerivedStateFromProps

docs/external/js/react-dom.development.js:12728–12754

(workInProgress, ctor, getDerivedStateFromProps, nextProps)

  }

  function applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, nextProps) {
    var prevState = workInProgress.memoizedState;

    {
      if ( workInProgress.mode & StrictMode) {
        // Invoke the function an extra time to help detect side-effects.
        getDerivedStateFromProps(nextProps, prevState);
      }
    }

    var partialState = getDerivedStateFromProps(nextProps, prevState);

    {
      warnOnUndefinedDerivedState(ctor, partialState);
    } // Merge the partial state and the previous state.


    var memoizedState = partialState === null || partialState === undefined ? prevState : _assign({}, prevState, partialState);
    workInProgress.memoizedState = memoizedState; // Once the update queue is empty, persist the derived state onto the
    // base state.

    if (workInProgress.expirationTime === NoWork) {
      // Queue is always non-null for classes
      var updateQueue = workInProgress.updateQueue;
      updateQueue.baseState = memoizedState;
    }
  }
  var classComponentUpdater = {
    isMounted: isMounted,
    enqueueSetState: function (inst, payload, callback) {