Typescript: private member is suddenly undefined

Question

So, I\'ve got a basic Typescript application, that shouldn\'t actually cause any major problems, but it seems, that something\'s going wrong here and I have no idea what.

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Answer 1

You're losing the object context when you pass setInterval() a reference to the "render" method that way.

setInterval(function() { game.getGameContainer().render(); }, 16);

There's no intrinsic relationship between a function and an object that refers to it via a property value. By using an anonymous function, you can ensure that the "container" object will be the value of this inside "render".

You could also do this with the .bind() method of the Function prototype:

setInterval(game.getGameContainer().render.bind(game.getGameContainer()), 16);

but that seems a little ugly in this case.