Accessing functions in the window object

Question

If I type: window['alert'] in the console it will find the alert() function.

However if I type: window['location.replace']

It will be undefined. Why can't I access the location.replace function?

Answer 1

replace() is a function found in the object window.location, or window['location'], so you will have to write:

window.location.replace

or

window['location']['replace']

Answer 2

What you want is window['location']['replace'] (or window['location'].replace).

"location.replace" is not inside of "window". Rather, "replace" is inside of "location", which is inside of "window". Thus, it must be accessed in that order.