event listener context

[Maciej Dziardziel]

Is there a way to pass context to event listener?

Something like:

socket.on("message", function(){}, {context: some_object } );

I am trying to pass class method (using JS.Class library) as a
listener,
but without context its a bit tricky.

--
Maciej Dziardziel

[Tad Glines]

Perhaps this is a naive solution but what about doing:

function bind(context, fn) () {
    return function() { fn.apply(context, arguments); };
}

socket.on("message", bind(object, function(message) { // do stuff });

I think dojo provides a function (bind?) to do this that is much more intelligent.

-Tad

[Arnout Kazemier]

I was about to suggest the same, nearly all decent js libraries support something like that. 

[Maciej Dziardziel]

Thanks.

On Nov 9, 11:42 pm, Tad Glines <tad.gli...@gmail.com> wrote:
> socket.on("message", bind(object, function(message) { // do stuff });

-
Maciej Dziardziel
fie...@gmail.com

[Julien Genestoux]

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[James Pike]

> Is there a way to pass context to event listener?
>
> Something like:
>
> socket.on("message", function(){}, {context: some_object } );

Use a closure

var context = {context: some_object}
socket.on("message", function(){
// function can access context
})

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