Maintaining the reference to “this” in Javascript when using callbacks and closures

Question

I find myself assigning \"this\" to a variable so I can easily use it in callbacks and closures.

Is this bad practice? Is there a better way of referring back to the

Answer 1

Unfortunately this is the well-established way to do this, although that is a widespread naming convention for this "copy".

You can also try:

db.User.findById('ABCD', this.foo.bind(this));

But this approach requires foo() to have exactly the same signature as the one expected by findById() (in your example you are skipping err).