Function getStateFromUpdate

lib/assets/react-source/development/react.js:15938–16015

(workInProgress, queue, update, prevState, nextProps, instance)

	}

	function getStateFromUpdate(workInProgress, queue, update, prevState, nextProps, instance) {
	  switch (update.tag) {
	    case ReplaceState:
	      {
	        var payload = update.payload;

	        if (typeof payload === 'function') {
	          // Updater function
	          {
	            enterDisallowedContextReadInDEV();

	            if ( workInProgress.mode & StrictMode) {
	              payload.call(instance, prevState, nextProps);
	            }
	          }

	          var nextState = payload.call(instance, prevState, nextProps);

	          {
	            exitDisallowedContextReadInDEV();
	          }

	          return nextState;
	        } // State object


	        return payload;
	      }

	    case CaptureUpdate:
	      {
	        workInProgress.effectTag = workInProgress.effectTag & ~ShouldCapture | DidCapture;
	      }
	    // Intentional fallthrough

	    case UpdateState:
	      {
	        var _payload = update.payload;
	        var partialState;

	        if (typeof _payload === 'function') {
	          // Updater function
	          {
	            enterDisallowedContextReadInDEV();

	            if ( workInProgress.mode & StrictMode) {
	              _payload.call(instance, prevState, nextProps);
	            }
	          }

	          partialState = _payload.call(instance, prevState, nextProps);

	          {
	            exitDisallowedContextReadInDEV();
	          }
	        } else {
	          // Partial state object
	          partialState = _payload;