Question

I’m looking at a complex bit of JavaScript, which is doing all sorts of runtime/dynamic manipulation of objects and scripts. In the process, I’m learning all sorts of minutiae about Javascript and its idiosyncrasies.

This one has me stumped, though. Is there ever a situation where

window !== this.window; //true

In other words, when would you ever write this.window instead of straight out window?

Answer 1

“Is there ever a situation where window !== this.window; //true“

Sure, whenever this refers to an object without a .window property or with a .window property that doesn’t point to the global object (assuming a browser environment where window is the global).

“…when would you ever write this.window instead of straight out window?

When this refers to an object where a .window property is anticipated not being a reference to the global.