On Fri, Sep 12, 2014 at 6:25 AM, Jane Chen <[email protected]> wrote:
> What's the difference between This() and Holder() in FunctionCallbackInfo?
> What does Callee() return? Can you show it with a JavaScript example?
.Callee() is the JS function that called your API function. It's
equivalent to the (deprecated) arguments.callee property.
.This() and .Holder() are often identical. The only time (that I know
of) when they are different is when instantiating objects that have a
prototypical inheritance chain:
function F() {}
F.prototype = g;
var f = new F;
f.x = 42;
Assume |g| is instantiated from an ObjectTemplate with a setter for
|x|. The last line invokes the setter with .This() pointing to |f|
and .Holder() pointing to |g|.
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