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Re: ES6 class properties are undefined ?

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On 29.01.2017 12:14, Une Bévue wrote:
> Le 29/01/2017 à 12:01, Martin Honnen a écrit :
>> Try whether using
>>   that.timerID = window.setInterval(function() { that.init(); }, 5000);
>
> Fine, thanks, that works !
>
> Do you have an explanation ?

Your attempt with
   that.timerID = window.setInterval(that.init, 5000);
passes the function reference the expression `that.init` gives to 
setInterval, it is then executed later in the context of the window 
object and not of the SocketService instance you want it to be called 
on. My suggestion passes a function reference forming a closure on the 
`that` variable and that way setInterval calls the method on the 
intended instance and not on the window object.

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ES6 class properties are undefined ? Une Bévue <unbewusst.sein@fai.invalid> - 2017-01-29 10:18 +0100
  Re: ES6 class properties are undefined ? Martin Honnen <martin.honnen@gmx.de> - 2017-01-29 12:01 +0100
    Re: ES6 class properties are undefined ? Une Bévue <unbewusst.sein@fai.invalid> - 2017-01-29 12:14 +0100
      Re: ES6 class properties are undefined ? Martin Honnen <martin.honnen@gmx.de> - 2017-01-29 12:55 +0100
        Re: ES6 class properties are undefined ? Une Bévue <unbewusst.sein@fai.invalid> - 2017-01-29 15:50 +0100
    Re: ES6 class properties are undefined ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-01-29 14:00 +0100
      Re: ES6 class properties are undefined ? Une Bévue <unbewusst.sein@fai.invalid> - 2017-01-29 15:56 +0100

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