reactjs - Cannot call this.setState in addEventListener function

enter image description here

I am trying to change the state on the click of a button I created through DOM methods. I tried passing "this" as a variable through the arguments of the function

var self="this"
b.addEventListener("click", function(self){
    self.setState({health:100}) })

and also tried adding .bind(this) at the end of the function but no luck.

b.addEventListener("click", function(){
    this.setState({health:100}) })

Answer

Please add above event handling in componentDidMount life cycyle.

componentDidMount(){

 var self=this;

//add b defination here;

  b.addEventListener("click", function()=>{ 

   //remove self from callback.
   //self  here causing shadowing to above self defination used below

    self.setState({health:100}) });

    OR


    this.setState({health:100}) });

}