Hi John, found this on Stack Overflow.

https://stackoverflow.com/questions/4603289/how-to-detect-that-javascript-and-or-cookies-are-disabled

This might be what you are looking for.

Dani Beaubien


> On Jun 5, 2018, at 9:17 PM, JOHN BAUGHMAN via 4D_Tech <4d_tech@lists.4d.com> 
> wrote:
> 
> First of in my testing I am not involving 4D at all. I was simply using Xojo 
> to test what you said in your post.
> 
> After a bit more testing, I realize now that I misunderstood your post 
> entirely.  
> 
> 
>> I don't know anything about Xojo, but from the code you posted all it seems 
>> to do is set a value on the server and immediately read it back. There is no 
>> way for the browser to have it yet. 
> 
> The code I quoted is Xojo code (not 4D) and it sets the cookie in the browser 
> from a Xojo web app. With Chrome’s developer’s console I can watch the cookie 
> being set when cookies are not being blocked.
> 
> What I should have understood in your post was that any web app or web server 
> can only determine if a cookie is set by what is passed from the browser in 
> the http header. So if my Xojo web app sets a cookie in the browser, that 
> would not be reflected in the header until the header was updated, which 
> would only happen the next time an exchange occurred between the web app or 
> web server and the browser. Xojo is adding the cookies it set since receiving 
> the current header to my test. 
> 
> For my idea to work in Xojo or 4D Web Server, there would have to be a way to 
> refresh the http header without refreshing the whole browser window. Perhaps 
> not possible.??. I noticed that eventually the header is updated after the 
> user has invoked a request or 2  to 4D (4d Web Server only talks to the Xojo 
> web app not the browser). Not sure when or what causes the header update 
> during those exchanges.
> 
> John
> 
> 
> 
> 
> 
> 
> John Baughman
> 1331 Auwaiku Street
> Kailua, Hawaii  96734
> (808) 262-0328
> john...@hawaii.rr.com
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