Foo this demo

foodemo

var blah = 'foo';
var myObject = {blah: 'I am myObject.foo'};
 
var sayFoo = function() {
  console.log(this['blah']);
};
 
// give myObject a sayFoo property and have it point to sayFoo function
myObject.sayFoo = sayFoo;
myObject.sayFoo(); // logs 'I am myObject.foo' 12
 
sayFoo(); // logs 'foo'