If you must nest functions in a way that requires access to multiple this', alias outer this to something meaningful - describe the value it's holding. Treat this as the invisible first argument.
In general though, avoiding the situation (nested functions and frivolous use of
this) will frequently produce clearer results.
this in nested functions
I was accidentally included in a discussion on how to best name
Giving style advice on naming nested
this without a meaningful context isn't too helpful in my opinion. Examples below have been altered to have at least some context, although a completely contrived and stupid one.