Develop Reference

ractivejs.push() returning object.keys error in IE11

I have an issue that I can't seem to figure out. I'm using ractiveJS for a DNS management system I'm building.
I'm trying to add a new record to the end of the existing records. I'm using ractive.get('A') to retrieve the current records. I'm then building a new object
var thisRecord = {};
thisRecord.hostname = "hostname";
thisRecord.ip = "123.123.123.123";
I'm then using records.push(thisRecord); to add it to ractiveJS. In Chrome, Firefox and Safari, this works fine, in IE11, I'm getting the following error coming back.
Just a note. Even though it's in file auth.js, that file is just a compressed file with a few other files within. The affected line seems to be in RactiveJS and this is the line
return n.isRoot?o=[].concat(Object.keys(t.viewmodel.data),Object.keys(t.viewmodel.mappings),Object.keys(t.viewmodel.computations)):(i=t.viewmodel.wrapped[n.str],r=i?i.get():t.viewmodel.get(n),o=r?Object.keys(r):null),o&&o.forEach(function(t){"_ractive"===t&&s(r)||e.push(n.join(t))}),e
Any ideas would be appreciated!
UPDATE
I've found out this issue is only in Ractive 0.7.3, the behaviour works as expected in < 0.7.3 and in Ractive 0.8.5, pushing an object into Ractive as above doesn't update the model at all.

I couldn't find an answer anywhere as no one seems to be having this issue. Upgrading to RactiveJS 0.8.5 seems to have fixed the issue, although had to do a bit more work to make other things work again...
Seems 0.7.3 to 0.8.5 had some breaking changes done, which can found here docs.ractivejs.org/0.8/migrating

Lightning script error in Chrome and Firefox but not in IE

I'm so used to having things work in Chrome and Firefox and then having to be fixed in IE that this has me well and truly stumped.
I'm trying to get DataTables to work within a Lightning component and keep getting this error: Uncaught TypeError: Failed to construct 'Option': Please use the 'new' operator, this DOM object constructor cannot be called as a function. As you can see here:
A mate at work suggested I try it in IE and it all works fine:
So I guess my question has multiple parts, not only do I need to understand why it fails in Chrome (and Firefox, because it errors there as well) and how I might correct it, but I'd also really like to understand what's going on within Lightning for this to happen as it seems as though the culprit is aura_prod.js but I've checked the script in both environments and it's the same in each...
Any help greatly appreciated.
EDIT
Quite rightly it has been pointed out that I haven't included any code, I guess the reason I didn't is because it's trivial:
$("#example").DataTable();
which is called after the table has been generated as a static table.

Object doesn't support property or method remove

I am using extjs and trying to remove a dom element dynamically like this-
if (Ext.getElementById('a'))
Ext.getElementById('a').remove();
This works fine in Chrome. I am running application on IE9 as well but it throws the error- Object doesn't support property or method remove
Please let me know if there is a workaround.

Ext.getElementById() is a private method - you may want to consider using Ext.get() instead.
Anyhow, if it works in Chrome and not in IE, most likely your dom is invalid - search for missing closing tags, or alternatively validate your dom using an online validator. Also see this.

"Object doesn't support property or method 'getAttribute'"

I'm working with Dynamics CRM 2011 Online and trying to refactor some code that works on the Quote > Add Product page to also work on Order > Add Product. The problem is that when the page loads I get the error "Unable to get property 'getValue' of undefined or null reference."
I went into the IE console (tried both IE 9 and 10) and typed in what I believed to be the offending line:
Xrm.Page.getAttribute('ati_clin').getValue()
It complains with "Object doesn't support property or method 'getAttribute'". I also tried
document.getElementById('ati_clin')
but that too fails.
This doesn't make sense to me because I can use the HTML view of the developer console to find the object on the page and it's clearly there (no typo too). It also doesn't make sense that this statement fails in the console on both pages even though one of the pages runs properly at runtime and the other doesn't. Shouldn't it at least work on the page that does work at runtime?
After doing some research I think the following posting is the most relevant but I'm afraid it doesn't lead me to an answer seeing as how new I am to this: Xrm.Page.data is null
My question is why does the console return this error if the element clearly exists?

A handy trick when debugging a problem like this:
The Xrm.Page object lives in the context of a frame. If you want to use console in IE Developer tools without having to break in debug mode, you first have to point to the frame on the page.
Example:
frames[0].Xrm.Page.getAttribute('ati_clin').getValue()

Can't Diagnose jQuery Error: "Object [object Object] has no method"

I'm working on a Wordpress theme and right now I'm trying to get MediaElement to display audio files on posts.
jQuery is loading fine (tested with jQuery alerts) but for some reason MediaElement doesn't want to work. I get the error
'Object [object Object] has no method 'mediaelementplayer','
and although I've double checked everything I just can't figure out what's wrong. If you need a live demo of the problem, check it out here: http://firstpersontheater.net/video/podcast/painkiller-already-episode-78 (please don't judge the theme, I'm working on getting core functionality done first and haven't really started designing yet, haha).

This worked for me with the WordPress plugin:
mejs.$('.mejs-player').mediaelementplayer();

Had this problem yesterday as well.
MediaElement.js actually includes several different files in the download package. In order to get the full-featured video player you have to include the "mediaelement-and-player.js" file, not the "mediaelement.js" file, which is just the library.

I encountered this same issue.
While I was unable to isolate exactly why this error occurs with the WordPress plug-in implementation of MediaElement.js, I was able to move past it by using the JavaScript of MediaElement only.
I modified the PHP to output the relevant audio and video HTML tags without ID's, and without the script that calls them. I also removed the aspects of the plug-in for cueing scripts, instead linking them myself in my theme.
I then had success calling MediaElement normally using jQuery.

Well what library are you using that adds the api mediaelementplayer? Looks like that plugin either isnt loaded correctly or you are using the API incorrectly.

Quick answer:
You trying to to call a method that does not exits.
var o = {a = 1, b = 2};
o.someFunctionIThinkShoudExist();
It would be nice if it showed what the name of the function you were trying to call was. This happened to me last week and I resolved it by making sure I had linked to the correct JavaScript files.
What you can check is that you are only linking to the libraries you are using, like jQuery, only once. If you link to jQuery and a jQuery extention, then linking to jQuery again will unbind the extension. Causing the above error when you try to call the function you think should exits.