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how show tweenmax.js from local if cdn fail?

Noranterry test
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Warning: Please note

This thread was started before GSAP 3 was released. Some information, especially the syntax, may be out of date for GSAP 3. Please see the GSAP 3 migration guide and release notes for more information about how to update the code to GSAP 3's syntax. 

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Hi, actually have this: 

 

<script src="//cdnjs.cloudflare.com/ajax/libs/gsap/1.10.1/TweenMax.min.js"></script>

 

so cdn could failed, which is the most optimal way to use my local copy?

 

<script type='text/javascript'>

  window.TweenMax || document.write('<script src="gsap/TweenMax.min.js">\x3C/script>')

</script>

 

Thanks in advance.

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Hi and welcome to the forums.

 

Yes the document write is the most common resource, another is using JQuery's ajax, that comes with it's own document write callback, but for that I use one of my favourite libreries: YepNopeJS, you can use it to load JQuery if that CDN fails too.

 

It's very simple to use it:

<script src="localPath/js/yepnope.js"></script>

<script>
yepnope([{
    load: 'http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js',//First we add the CDN links
    complete: function ()
    {
        if (!window.jQuery)//if the CDN fails we load the local copy
        {
            yepnope('localPath/js/jquery.min.js');
        }
    }
},{
    load: 'http://cdnjs.cloudflare.com/ajax/libs/gsap/latest/TweenMax.min.js'
    complete: function ()
    {
        if(!window.TweenMax)//if the CDN fails we load the local copy
        {
            yepnope('localPath/js/gsap/TweenMax.min.js');
        }
    }
}]);
</script>

And you're done!!

 

The beauty of YeoNope: no libraries dependencies, asynchronous, has callbacks and you can use it to conditionally load CSS as well, so is a great resource for IE fallbacks and responsive design.

 

Hope this helps,
Cheers,

Rodrigo.

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  • 4 years later...

Sorry @mrsam I wasn't clear on my point (too early in the day...).

 

I did not mean to specifically use the YepNope library, but to sniff out a response to the call. You can make use of Promise and the Fetch api.

 

Sorry I can't be more specific - I haven't had to sniff out CDN failures myself so, I'm talking on a totally theoretical platform.

 

:D

 

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