this inside object method

parent.js

function foo () {
	'use strict';
	console.log("Simple function call")
	console.log(this === window); 
}

let user = {
	count: 10,
	foo: foo,
	foo1: function() {
		console.log(this === window);
	}
}

user.foo()  // Prints false because now “this” refers to user object instead of global object.
let fun1 = user.foo1;
fun1() // Prints true as this method is invoked as a simple function.
user.foo1()  // Prints false on console as foo1 is invoked as a object’s method