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Don't start animation till section is reached

sreid62 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 Some information, especially the syntax, may be out of date for GSAP 3.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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Hello Everyone :)


I am new to GSAP and have a created a few animations however, I have reached a point where I am stuck. 


I have created an animation in Greensock however, I don't want my animation to play until that particular section on the page is reached or at least when the section reaches the middle of the viewport. I have used Tween Max to create the animation. 


At the moment the animation plays as soon as the page loads, but I only want it to play once that particular Div is reached or it within the middle of the viewport. 


How do I pause the animation from the start until I reach that section then play it? 


I have attached a codepen for reference. 


Any help on this would be greatly appreciated 





See the Pen xRBNmz by samjonreid (@samjonreid) on CodePen

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Hi sreid62 :)


Welcome to the GreenSock forums.


ScrollMagic is great for that kind of thing.





One of our forum moderators (Petr Tichy) has quite a bit of training available for it.






If you're looking for ways to create that effect without any other libraries, we had a discussion over here:



In particular, check Blake's answer here:



Hopefully that gets you started.


Happy tweening and welcome aboard.


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Hi PointC, 


Thanks very much for the speedy response. 


I have looked through the ScrollMagic documentation and in Titchy's videos he shows you how to add a class to an element once it reaches that section. However, I am using Greensock not CSS3 transition to control my animation. 


I followed the tutorial from Titchy and understood how it works, but I can't seem to apply that to a green sock animation.


Do you have any specific tutorials I can follow on how to pause TweenMax animation from the start and then trigger once the section is reached? 


Thanks in advance 



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You can definitely use it with GSAP animations. What's not always obvious is that you need an additional file to make everything work:


Here are the docs for that plugin:



Here's a CodePen that I used as answer for another forum question, but it has all the elements you need for ScrollMagic. You can fork it and mess around with it a bit to get the idea.


See the Pen JROqEA by PointC (@PointC) on CodePen


Hopefully that helps.


Happy tweening.


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