Typescript, Multiple Parameters with JQuery.on

Question

Using Typescript, I am having difficulty with an event.

The event raises like this...

$(this).trigger('customEvent', { page: index });

This has always worked fine in Javascript. But my wiring to this is not working in Typescript when I try to get the parameters...

$(someSelector).on('customEvent', (e, page) => {
   // do some stuff with page or e
});

It just refuses to let me have the two parameters. But the standard e does not contain all of the information I need for this to work right.

basarat · Accepted Answer · 2014-01-22 23:19:35Z

3

This is be cause of the signature defined for event handlers. All members after the first are optional see : https://github.com/borisyankov/DefinitelyTyped/blob/master/jquery/jquery.d.ts?source=c#L2280

Therefore make page optional (using ?):

$(someSelector).on('customEvent', (e, page?) => {
   // do some stuff with page or e
});

answered Jan 22, 2014 at 23:19

basarat

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1 Comment

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