Eval is really slow. I would use JSNI. Eventually I think J2CL will have a
way to execute javascript. Just isolate the JSNI in a helper class so it
can easily be replaced.
On Wednesday, May 25, 2016 at 3:35:07 PM UTC-4, Hristo Stoyanov wrote:
>
> Actually, it might be possible to do it with JsInterop only:
>
> class Globals {
>
> @JsMethod(namespace=GLOBAL)
> public native Object eval(String expresion);
>
> @JsOverlay
> public native boolean isVariableDefined(String varName){
> return Boolean.TRUE.equals(eval("!!window['"+varName+"']"));
> }
>
> }
>
> I guess, you can also use JSON.safeEval() ... but we dont know if will
> survive in J2CL.
>
>
> On Wednesday, May 25, 2016 at 12:21:26 PM UTC-7, Hristo Stoyanov wrote:
>>
>> Jens,
>> Thanks, so apparently JsInterop cannot be a complete replacement of JSNI?
>>
>> I was hoping to be able to wrap in @JsType(native = true) something like
>> Object.keys(window)
>> <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys>
>>
>> On Tuesday, May 24, 2016 at 5:11:39 PM UTC-7, Jens wrote:
>>>
>>> You still need to use JSNI for accessing these properties. Depending on
>>> the API you want to build you could define @JsOverlay methods inside
>>> @JsType(native = true) classes and let them delegate to a JSNI based
>>> utility class.
>>>
>>> -- J.
>>>
>>
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