[Solved] Kindly explain why in following example the output is ‘undefined’? [duplicate]

by


arguments[0]() is executing in the Window context, but it does not have any object property defined in the name bar (which is a property of foo). This is why you get undefined. To solve the issue, you can bind the object.

Change

foo.bar

To

foo.bar.bind(foo)


var foo = {
  bar: function() { return this.baz; },
  baz: 1
};
var a = (function(){
  console.log(this.constructor.name); // Window
  return typeof arguments[0]();
})(foo.bar.bind(foo));

console.log(a);

6

solved Kindly explain why in following example the output is ‘undefined’? [duplicate]