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Console is returning: Failed to load gsap.min.js.map

Daniel2024 test
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Hello guys,


I have included gsap.min.js in a folder. After taking a look in the console, I noticed that I am getting the notification that the gsap.min.js.map file failed to load (404).

I am confused about this error, because I just included gsap.min.js in my folder and not .map file.

What is wrong here?


Thank you in advance.


Regards Daniel



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Hi Zach,


no, I use vs-code.

I downloaded gsap and embedded it locally.

I also embedded:


<script src="./js/gsap.min.js"></script>

<script src="./js/scrollmagic/ScrollMagic.min.js"></script>

<script src="./js/scrollmagic/animation.gsap.js"></script>

<script src="./js/main.js"></script>


in the same sequence like above.

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You can find some of the map files here. 



47 minutes ago, Daniel2024 said:

it seems that the data is too big in my folder. Is there any other way to upload it?


Put it on GitHub. We don't need to see your project. Just enough to reproduce the error.


I don't know why your setup is trying to load it though. The map files are only used for errors. Maybe the problem is ScrollMagic. It hasn't been updated to work with v3.



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3 minutes ago, Daniel2024 said:

The problem is solved. I putted the .map-file in the same folder as gsap.min.js!


Cool! Quick question, were you using a server/framework, and if so what e.g. node, express, apache, wordpress, etc?


I'm just wondering what was making it show the 404, because I don't think that should happen by default.

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I was running my project on localhost and I was using only greensock and scroll magic.

Now im facing the problem that probably scrollMagic isn't working. I have made several animations but now on one page the animations cant be executed.


"Maybe the problem is ScrollMagic. It hasn't been updated to work with v3."


How can I solve this?

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im getting these errors:


[Warning] Invalid property – "opacity" – "set to" – 0 – "Missing plugin? gsap.registerPlugin()" (gsap.min.js, line 11)
[Warning] Invalid property – "y" – "set to" – 35 – "Missing plugin? gsap.registerPlugin()" (gsap.min.js, line 11)
[Warning] GSAP target null not found. https://greensock.com (gsap.min.js, line 11)

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This doesn't help - we'd need to see your code in context. All you shared are some library files which aren't the problem. Can you please share an actual project that clearly shows the problem (with as little code as possible)? We need to be able to run it in the browser and actually see the errors in the console for ourselves please. But again, we can't support ScrollMagic specifically here, as it's not a GreenSock product. If there are any GSAP-specific questions, though, we'd be happy to help. 

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I had to deal with this "issue" as well, I didn't go through entire code but for some reason ScrollMagic tries to update tween twice, then detects it as overwrite and tries to call onOverwrite method which has been removed from gsap 3. Certainly not related to GSAP and those are just warnings, you can ignore them without any issue. There are other compatibility issues, for example ScrollMagic tries to use 'Tween' object when you try to update scene duration on the fly, this gives error. You can set Tween equal to gsap directly in ScrollMagic files.

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  • 1 month later...

I was having the same issue with the gsap.min.js.map file. After downloading it and throwing it in the GSAP local folder all is well. Now I'm facing the same issue with GSDevTools.min.js.map. Any chance of getting that too?


For context: I'm developing in the Intellij IDEA IDE which uses the Python SimpleHTTPServer for local testing. I only have the issue occurring when running my project in localhost. It randomly shows "pending" status for various files when I try to load the project.

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