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IE8 - Unable to get value of the property 'cssRules' (and 'tracks'): object is null or undefined

In IE8 I am getting the following errors which prevent JWplayer from playing at all:

SCRIPT5007: Unable to get value of the property 'cssRules': object is null or undefined
jwplayer.html5.js, line 9 character 34

SCRIPT5007: Unable to get value of the property 'tracks': object is null or undefined
jwplayer.js, line 34 character 144


I tried adding:
<meta content="IE=edge" http-equiv="X-UA-Compatible">

but that didn't do anything. JW works in IE9 and all other browsers. The path to the flash swf is also correct.

18 Community Answers

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JW Player

User  
0 rated :

Correction, the player does not play in Safari (windows) either, just firefox and chrome.

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Ethan Feldman

JW Player Support Agent  
0 rated :

Do you have a link?

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JW Player

User  
0 rated :

I got it working in IE8, However still does not play in safari.

http://chicagobluesnetwork.com/Shows/Listen/rob-stone-the-c-notes-16

user: thisuser
pass: testing123

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JW Player

User  
0 rated :

I don't see anything on that page that looks even remotely like JW Player 6 embedding code, and the username and password are rejected.

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JW Player

User  
0 rated :

The login works fine for me, you can register if you want to try it. It is JWplayer, just look at the source code.

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JW Player

User  
0 rated :

I should note in order to see the source, you have to login first.

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Ethan Feldman

JW Player Support Agent  
0 rated :

I was able to log in with that username / password.

There is no need to load the player like this:

<script type="text/javascript" src="/Scripts/jwplayer.js"></script><script type="text/javascript" src="/Scripts/jwplayer.html5.js"></script>

Just change it to:

<script type="text/javascript" src="/Scripts/jwplayer.js"></script>

It will load the html5 player when needed automatically. Adding the 2nd line could also be causing issues.

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JW Player

User  
0 rated :

I removed that line, still no playback in safari, It appears that the media loading just hangs in safari, where as the other browsers load the media fine.

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Ethan Feldman

JW Player Support Agent  
0 rated :

I just tried to check your link in Safari and your testing username / password no longer work.

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JW Player

User  
0 rated :

Yes I removed that login, however you can create an account with dummy information and it will still play

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Ethan Feldman

JW Player Support Agent  
0 rated :

Can you put the log in back…?

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JW Player

User  
0 rated :

How did you get this to work in IE8. I have same issue.

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JW Player

User  
0 rated :

I am experiencing the same issue here, but only in IE7 with a player provided by Bits on the Run:

bc.. SCRIPT5007: Unable to get value of the property 'tracks': object is null or undefined


In the beautified script it goes wrong at (see --->):
bc.. d.item = function (h) {
var g = jwplayer.utils,
c = g.extend({}, a.defaults, h);
---> c.tracks = g.exists(h.tracks) ? h.tracks : [];
0 == c.sources.length && (c.sources = [new d.source(c)]);
for (var b = 0; b < c.sources.length; b++) {
var e = c.sources[b]["default"];
c.sources[b]["default"] = e ? "true" == e.toString() : !1;
c.sources[b] = new d.source(c.sources[b])
}
if (c.captions && !g.exists(h.tracks)) {
for (h = 0; h < c.captions.length; h++) c.tracks.push(c.captions[h]);
delete c.captions
}
for (b = 0; b < c.tracks.length; b++) c.tracks[b] = new d.track(c.tracks[b]);
return c
};



Variable h seems undefined, so the next line seems to solve my problem:
bc.. c.tracks = h && g.exists(h.tracks) ? h.tracks : [];

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Ethan Feldman

JW Player Support Agent  
0 rated :

@Jason – Do you have a link?

@lmeurs – This will be fixed shortly when BOTR updates from 6.3 to 6.5.

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JW Player

User  
0 rated :

@Steve - what did you do resolve for IE8

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Ethan Feldman

JW Player Support Agent  
0 rated :

Do you have a link to where this is not working for you?

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JW Player

User  
0 rated :

I managed to get this working in < IE 8. I followed Imeurs' solution, but some of the variable names were different in the jwplayer.js file.

So I changed on line 34 in jwplayer.js from:

bc.. c.tracks=e.exists(k.tracks)?k.tracks:[];


to this:

bc.. c.tracks=k && e.exists(k.tracks)?k.tracks:[];


It now seems to be working on IE and elsewhere.


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Ethan Feldman

JW Player Support Agent  
0 rated :

Thanks for sharing David.

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