Error: this.setstate() is not a function in ReactJS

We can get this error inside a function call. Remember to bind that function.

constructor(props){
    super(props);
    this.clear=this.clear.bind(this); // remember to bind your function.
    this.state{
      name=''
    };
  }

  public clear():void{
    this.setState({name:'Akanksha'}); // error here
  }