How to bind 'this' to functions outside react class which is a callback from other component?

Question

I have a React Component such as :

function callback(params){..
// I need to use this.setstate but this callback function is called 
// from other component. How         


        

Answer 1

I don't really understand the question. I don't know if this is what you mean, but if you want to save the 'this' temporary variable, then just create a global array or single variable to store the 'this'.

var thisTemp;

function callback(params){..
// use variable here
thisTemp.blah();
...
}

class RespProperties extends Component { ..
//Assign this to thisTemp
thisTemp = this;
...
}