Warning.js:45 Warning: Setstate(...): Can Only Update A Mounted Or Mounting Component

I am new to js I am trying to use this.setState({ but I am getting a warning. can you guys tell me why I am getting the below warning warning.js:45 Warning: setState(...): Can on

Solution 1:

Change:

componentWillMount 

to

componentDidMount

Components have to be mounted before they can do stuff like set state.

Solution 2:

Warning appears because you use setState in componentWillMount lifecycle. Take a look at this tutorial https://facebook.github.io/react/tutorial/tutorial.html here you can find how correctly to use setState()