Question

I have a situation (using the Raphael library) where I have this:

rect.click(doSomething);

And within doSomething(), I can get the bounding box size:

var boxSize = this.getBBox();

The problem is, what if I want to pass an argument to doSomething? If I do, then the this reference breaks for some reason. How can I pass in an argument and still use this?

Answer 1

You can wrap the listener in another function, and use .call() to call the function with given parameters:

var foo = 123, bar = 'blabla';
rect.click(function(event) {
    return doSomething.call(this, event, foo, bar);
});