I'm wondering if it would be possible to have type-safe convenience methods
for creating elements, so as the user does not have to provide the string
tag name, nor cast the object, maybe something like :
HTMLButtonElement button = HTMLButtonElement.createElement();
instead of
HTMLButtonElement button = (HTMLButtonElement)
document.createElement("button");
El sáb., 2 jul. 2016 a las 4:38, 'Goktug Gokdogan' via GWT Contributors (<
[email protected]>) escribió:
> Closure extern definition uses a union type here:
>
> https://github.com/google/closure-compiler/blob/master/externs/browser/w3c_event.js#L34
>
> So it accepts either EventListener interface or a function.
>
> When we see a union type, we generate overloads for each type so Elemental
> should provide overloads that includes both. And it seems like it does. If
> not please let us know.
>
> On Fri, Jul 1, 2016 at 3:39 AM, Jens <[email protected]> wrote:
>
>>
>> Thanks, now makes sense. I get confused with the JsFunction
>>> JsType(native) because elemental2 has some callbacks as JsFunction and
>>> others as JsType(native), now an actual elemental2 question; what criteria
>>> is used to apply JsFunction (ex. elemental2.Node.AddEventListenerCallback)
>>> instead of JsType (ex. elemental2.JsType)?
>>>
>>
>> I think its the result of definition of EventTarget.addEventListener():
>>
>> *listener - The object that receives a notification (an object that
>> implements the Event
>> <https://developer.mozilla.org/en-US/docs/Web/API/Event> interface) when an
>> event of the specified type occurs. This must be an object implementing the
>> EventListener
>> <https://developer.mozilla.org/en-US/docs/Web/API/EventListener> interface,
>> or simply a JavaScript function
>> <https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Functions>.*
>>
>> The EventListener interface is a defined API and thus a @JsType(isNative
>> = true) interface has been generated. But to conform to "or simply a
>> JavaScript function" there is also an AddEventListenerCallback that is a
>> @JsFunction. Not sure if this distinction has any real value, in a hand
>> coded elemental2 I would have only created a @JsFunction interface
>> EventListener
>>
>> -- J.
>>
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