bind and apply

https://medium.com/@ivansifrim/the-differences-between-call-apply-bind-276724bb825b

javascript bind example

let obj = {things: 3};

let addThings = function(a, b, c){

return this.things + a + b + c;

};

let fn=addThings.bind(obj); //bind will return the function copy and obj parameter which took place of this.

fn(1,2,3);

//console.log( addThings.bind(obj)(1,4,6) );