javascript dynamic connection

Question

JavaScript

Please tell me if it is possible to do something like this:

You need to connect a remote script, for example

<script  type="text/javascript" src="//remotehost1.com/script.js"></script>

At the same time, you need to check whether this script is available (preferably with a custom timeout) and if it is not available (for example, that server has crashed), connect another one, for example:

<script  type="text/javascript" src="//remotehost2.com/script.js"></script>

Answer 1

yepnope.js to help you

Answer 2

The guys from Zeptolab have written a nice resource loader, this is probably what you need thinkpixellab.com/pxloader/

Answer 3

There is also a variant from html5 boilerplate .

  <!-- Grab Google CDN's jQuery, with a protocol relative URL; fall back to local if offline -->
  <script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
  <script>window.jQuery || document.write('<script src="js/libs/jquery-1.7.1.min.js"><\/script>')</script>

Answer 4

Look at the onload and onerror events of the script, although they write that there are no such events according to the standards, but browsers support them