game.timer.event & scope

[charlie_says]

I have a query about using game.time.events

 

When I use this, I think I'm losing the scope of where the event is set as this code:

game.time.events.add( 100, this.doStepBoost );

gives this error:

 

this.doStepBoost is not a function (removing the this doesn't remedy the issue).

 

I'm sure this is because I'm using the event incorrectly, any pointers as to where I'm going wrong?

[jpdev]

Try:

game.time.events.add( 100, this.doStepBoost.bind(this) );

to preserve the scope.

[stasuss]

Why not use the callback context, which is the third parameter?

game.time.events.add(100, this.doStepBoost, this);

In this case 'this' in the callback will be set to the third parameter, which is 'this'.

You can also use closures:

var that = this;game.time.events.add(100, this.doStepBoost);

and inside callback:

that.doStepBoost

[charlie_says]

The first example works fine!