setState doesn't update the state immediately

Question

I would like to ask why my state is not changing when I do an onclick event. I\'ve search a while ago that I need to bind the onclick function in constructor but still the s

Answer 1

Fortunately setState() takes a callback. And this is where we get updated state.

Consider this example.

this.setState({ name: "myname" }, () => {                              
        //callback
        console.log(this.state.name) // myname
      });

So When callback fires, this.state is the updated state.
You can get mutated/updated data in callback.