explanation about "state updates are merged" (#3956)

VamsiDevalla · web-flow · commit f78f3b125fc8 · 2021-10-18T11:01:10.000+02:00
diff --git a/content/tutorial/tutorial.md b/content/tutorial/tutorial.md
@@ -1147,6 +1147,7 @@ Next, we'll define the `jumpTo` method in Game to update that `stepNumber`. We a
     // this method has not changed
   }
 ```
+Notice in `jumpTo` method, we haven't updated history property of the state. That is because state updates are merged or in more simple words react will update only the properties mentioned in `setState` method leaving the remaining state as that is. For more info **[see the documentation](https://reactjs.org/docs/state-and-lifecycle.html#state-updates-are-merged)**
 
 We will now make a few changes to the Game's `handleClick` method which fires when you click on a square.
 

Original file line number	Diff line number	Diff line change
@@ -1147,6 +1147,7 @@ Next, we'll define the `jumpTo` method in Game to update that `stepNumber`. We a
`1147`	`1147`	`// this method has not changed`
`1148`	`1148`	`}`
`1149`	`1149`	```
	`1150`	+Notice in `jumpTo` method, we haven't updated history property of the state. That is because state updates are merged or in more simple words react will update only the properties mentioned in `setState` method leaving the remaining state as that is. For more info [see the documentation](https://reactjs.org/docs/state-and-lifecycle.html#state-updates-are-merged)
`1150`	`1151`
`1151`	`1152`	We will now make a few changes to the Game's `handleClick` method which fires when you click on a square.
`1152`	`1153`