apply in javascript mdn code example
Example 1: apply() js
The apply() method accepts arguments in an array:
var arr = [6, 89, 3, 45];
var maximus = Math.max.apply(null, arr); // returns 89
Example 2: apply js
Function.prototype.construct = function (aArgs) {
let fNewConstr = new Function("");
fNewConstr.prototype = this.prototype;
let oNew = new fNewConstr();
this.apply(oNew, aArgs);
return oNew;
};