Title: IE8 Javascript error
Last modified: August 21, 2016

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# IE8 Javascript error

 *  [ionainteractive](https://wordpress.org/support/users/ionainteractive/)
 * (@ionainteractive)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/ie8-javascript-error/)
 * In troubleshooting an unrelated problem today for a client, I noticed that IE8
   was throwing a Javascript error on my site for the /video-js/video.js file:
 * ‘video’ is undefined, Line 121, Char 365
 * I found that if I remove the comment tag at the very end of the video.js file(
   which reads “//@ sourceMappingURL=video.js.map”) the error disappeared.
 * [http://wordpress.org/plugins/video-embed-thumbnail-generator/](http://wordpress.org/plugins/video-embed-thumbnail-generator/)

Viewing 6 replies - 1 through 6 (of 6 total)

 *  Plugin Author [Kyle Gilman](https://wordpress.org/support/users/kylegilman/)
 * (@kylegilman)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/ie8-javascript-error/#post-4010187)
 * Thanks. I’ve also noticed a video.js.map error in other browsers in the latest
   version of video.js. I haven’t had a chance to get to the bottom of it yet, but
   that seems like a good fix.
 *  [kayleighmj](https://wordpress.org/support/users/kayleighmj/)
 * (@kayleighmj)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/ie8-javascript-error/#post-4010597)
 * I’ve been getting a similar error message today in Google Chrome:
 * GET [http://mywebsite.ca/filepath/video.js.map](http://mywebsite.ca/filepath/video.js.map)
   401 (Authorization Required)
 * My VideoJS player still functions perfectly, although this error message seems
   to break another portion of my site (Layerslider thumbnail navigation).
 * Any idea what might be causing this problem or how to solve it?
 *  Plugin Author [Kyle Gilman](https://wordpress.org/support/users/kylegilman/)
 * (@kylegilman)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/ie8-javascript-error/#post-4010598)
 * The current version of Video.js is causing the problem, and ionainteractive posted
   a good fix for it. I would try that out first, but I suspect that something else
   is actually breaking your Layerslider thumbnail navigation.
 *  [kayleighmj](https://wordpress.org/support/users/kayleighmj/)
 * (@kayleighmj)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/ie8-javascript-error/#post-4010599)
 * Sorry, I should’ve mentioned: ionainteractive’s fix did remove the error message,
   though my navigation is still not functioning properly. Seems to be only in Chrome
   and the error message above is the only one my page generates, so I figured they
   might be connected.
 * Anyhow thanks for the quick reply. Great plugin, thank you.
 *  Plugin Author [Kyle Gilman](https://wordpress.org/support/users/kylegilman/)
 * (@kylegilman)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/ie8-javascript-error/#post-4010600)
 * Does the Layerslider navigation work if you disable my plugin? If it does, please
   post a link to your site so I can help troubleshoot.
 *  [kayleighmj](https://wordpress.org/support/users/kayleighmj/)
 * (@kayleighmj)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/ie8-javascript-error/#post-4010601)
 * No, the nav is broken with or without VideoJS apparently. Must be something else
   in my code that is causing it to break. I’ll have to play around and see if I
   can isolate the issue.
 * Thanks again for your help.

Viewing 6 replies - 1 through 6 (of 6 total)

The topic ‘IE8 Javascript error’ is closed to new replies.

 * ![](https://ps.w.org/video-embed-thumbnail-generator/assets/icon.svg?rev=2965979)
 * [Videopack](https://wordpress.org/plugins/video-embed-thumbnail-generator/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/video-embed-thumbnail-generator/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/video-embed-thumbnail-generator/)
 * [Active Topics](https://wordpress.org/support/plugin/video-embed-thumbnail-generator/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/video-embed-thumbnail-generator/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/video-embed-thumbnail-generator/reviews/)

## Tags

 * [IE8](https://wordpress.org/support/topic-tag/ie8/)
 * [javascript](https://wordpress.org/support/topic-tag/javascript/)

 * 6 replies
 * 3 participants
 * Last reply from: [kayleighmj](https://wordpress.org/support/users/kayleighmj/)
 * Last activity: [12 years, 9 months ago](https://wordpress.org/support/topic/ie8-javascript-error/#post-4010601)
 * Status: not resolved