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I have been stuck for a while trying to find out what exactly the _layouts folder does for SharePoint and why it may be causing any script I write and attempt to deploy on the site to not work. They are simple scripts attempting to gain access to the CSOM to be able to manipulate list data. I use the following source references at the top of my code:

   <script 
src="//ajax.aspnetcdn.com/ajax/4.0/1/MicrosoftAjax.js" 
type="text/javascript">
</script>

<script
type="text/javascript"
src="//ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js">
</script>

The error when the page loads: HTTP404: NOT FOUND GET - https://urimdev.byu.edu/_layouts/15/RecordsManagement/Scripts/jquery-1.10.2.min.map

With my limited knowledge of this framework, I suspect that this may be causing the problem the following error (the one where the script stops working)`:

Unable to get property 'apply' of undefined or null reference MicrosoftAjax.js

Can anyone with SharePoint development experience help me understand these errors so I can get my scripts working in my site collection?

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  • Looks like you don't have the right jquery file uploaded. 1.7.2.min vs 1.10.2.min.map
    – Roland
    Jan 29, 2016 at 2:08

1 Answer 1

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_layouts is a virtual directory that maps to a folder in the file system of a SharePoint server. This folder is used to store files and templates (including JavaScript files) that are used across the SharePoint farm.

I cover how to deploy and reference JavaScript files in my JavaScript and jQuery for SharePoint Developers conference session which I've recorded and uploaded to YouTube.

Seeing that you are new to SharePoint development, you may also find SharePoint 2010 for ASP.NET Developers valuable. It was recorded for SharePoint 2010 but most of the material applies to SharePoint 2013.

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