Function commitUnmount

lib/assets/react-source/development/react.js:23746–23847

(finishedRoot, current, renderPriorityLevel)

	function commitUnmount(finishedRoot, current, renderPriorityLevel) {
	  onCommitUnmount(current);

	  switch (current.tag) {
	    case FunctionComponent:
	    case ForwardRef:
	    case MemoComponent:
	    case SimpleMemoComponent:
	    case Block:
	      {
	        var updateQueue = current.updateQueue;

	        if (updateQueue !== null) {
	          var lastEffect = updateQueue.lastEffect;

	          if (lastEffect !== null) {
	            var firstEffect = lastEffect.next;

	            {
	              // When the owner fiber is deleted, the destroy function of a passive
	              // effect hook is called during the synchronous commit phase. This is
	              // a concession to implementation complexity. Calling it in the
	              // passive effect phase (like they usually are, when dependencies
	              // change during an update) would require either traversing the
	              // children of the deleted fiber again, or including unmount effects
	              // as part of the fiber effect list.
	              //
	              // Because this is during the sync commit phase, we need to change
	              // the priority.
	              //
	              // TODO: Reconsider this implementation trade off.
	              var priorityLevel = renderPriorityLevel > NormalPriority ? NormalPriority : renderPriorityLevel;
	              runWithPriority$1(priorityLevel, function () {
	                var effect = firstEffect;

	                do {
	                  var _destroy = effect.destroy;

	                  if (_destroy !== undefined) {
	                    safelyCallDestroy(current, _destroy);
	                  }

	                  effect = effect.next;
	                } while (effect !== firstEffect);
	              });
	            }
	          }
	        }

	        return;
	      }

	    case ClassComponent:
	      {
	        safelyDetachRef(current);
	        var instance = current.stateNode;

	        if (typeof instance.componentWillUnmount === 'function') {