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By using the obvious event handler::

layer.getSource().on('tileloaderror', function (ev) {
        console.log(ev);
I get an output rather useless, since it doesn't seem to contain any information regarding HTTP Response body/headers etc.
Is there a way to access those kind of information after a failed tile request?
In my implementation, access token must be updated, thus response code is necessary.
If not possible after all, maybe there is a way to create a custom tile load request (maybe implement my own "tileloadfunction" or something). 
                Why API docs for older versions are removed? Can not find doc for the version I use (4.2) anywhere... That makes devel impossible,since I'm not planning on updating ol version any time soon...
– Jimi
                Oct 16, 2018 at 13:53
                You can use this link to find some previous example. But they should keep the previous example tsauerwein.github.io/ol3/animation-flights/examples
– Atanu
                Nov 23, 2018 at 8:56
        
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