Node object is null or undefined

[mkaz]

Received an error from a user running IE9 that is reporting the following bug

[WebReflection]

I don't know what is wp-emoji-release.min.js file so I gonna mark this as invalid unless I understand what has this library to do with that.

[mkaz]

@WebReflection - sorry for not clarifying that in the initial report. It is simply a bundle of the twemoji.min.js which is being included in the next WordPress 4.2 core release.

The error is being triggered by an undefined node being passed to here:
https://github.com/twitter/twemoji/blob/gh-pages/twemoji.js#L271

My initial thought would be to do a check of the node being undefined and bailing out of that function if that is the case. I can submit a patch if this sounds reasonable.

[WebReflection]

nope, I want to know why that's the case.

I need the exact version of the bundled twemoji.min.js file, hoping that's the latest ( reason there is a CDN ;-) ) and I want the page r document that fails.

I need to know if it fails only in IE9 and eventually why. Having a weak logic in place is not an option, and there should never be a case where subnode is undefined.

I don't want a work around but eventually a proper fix 'casue this library has been battle tested already a lot, nobody mentioned this problem before.

Thanks for collaboration

[pathawks]

http://driving.wpdstg1.canada.com/wp-includes/js/wp-emoji-release.min.js?ver=4.2-beta3-31943

Unminified: http://driving.wpdstg1.canada.com/wp-includes/js/wp-emoji.js

Bundled twemoji.js: http://driving.wpdstg1.canada.com/wp-includes/js/twemoji.js

[WebReflection]

OK this is not really helping.

• that code is for IE8, I don't see a DOMContentLoaded fallback for modern browsers and IE9
• that code trusts readyState and invokes load believing that if the emoji library is in, then the document.body must be in too ... very weird logic in there ...
• I've no idea which version of twemoji you are running there. Can you ensure me that's the last one?
• I've no idea against which page that thing is loaded
• I still don't know if it's an IE9 problem only

I won't comment other things that make little sense to me, like new wpEmoji() without a this or a prototoype in the entire file, but in order to accept this bug I need a way to understand what's the problem and reproduce. Thanks