ScrollTrigger - Animation reset after pass Trigger but not finished Timeline

[Thom]

I work on
ADHS-Gutachten.de

 

I use scroll triggers to control the ThreeJS scene and the divs and their contents. Everything works very well at first.

 

But:
If I use the scroll bar and quickly scroll from top to bottom, various elements stop. I suspect that since the animations are not finished but the user scrolls past the trigger, the information to continue the animation is missing.

I use the following code that repeats itself for all elements:

With different classes, of course.

 

const tlBackA2 = gsap.timeline({

    scrollTrigger: {

        trigger: ".B",

        start: "100% 50%", 

        end: "100% 50%", 

        toggleActions: "restart none reverse none", 

    }

});

 

 

tlBackA2.fromTo(".A2",

    { y: "0vh" },

    {

        y: "-75vh",

        duration: 0.5, 

        ease: "power4.inout"

    }

).delay(0.4);

 

const tlBackA2o = gsap.timeline({

    scrollTrigger: {

        trigger: ".C",

        start: "100% 50%", 

        end: "100% 50%", 

        toggleActions: "restart none reverse none",

    }

});

 

tlBackA2o.fromTo(".A2",

    { y: "-75vh" },

    {

        y: "-150vh",

        duration: 0.5, 

        ease: "power4.inout"

    }

).delay(0.4);

 

 

I need information on how to set the positions of the classes at the beginning or end of each timeline, even if the animation of the timeline and the associated trigger have not yet been completed. The trigger has already run through.

 

Maybe I think too complicated and it is a total beginner problem

 

Can anyone give me a reference to a tutorial or tell me what I have forgotten in this code and what I need to pay attention to?

Thanks for your time and help
Thom

[GSAP Helper]

Without a minimal demo, it's very difficult to troubleshoot; the issue could be caused by CSS, markup, a third party library, a 3rd party script, etc. Would you please provide a very simple CodePen or Stackblitz that illustrates the issue? 

 

Please don't include your whole project. Just some colored <div> elements and the GSAP code is best. See if you can recreate the issue with as few dependencies as possible. Start minimal and then incrementally add code bit by bit until it breaks. Usually people solve their own issues during this process! If not, at least we have a reduced test case which greatly increases your chances of getting a relevant answer.

 

See the Pen aYYOdN by GreenSock (@GreenSock) on CodePen.

that loads all the plugins. Just click "fork" at the bottom right and make your minimal demo: 

 

Using a framework/library like React, Vue, Next, etc.? 

CodePen isn't always ideal for these tools, so here are some Stackblitz starter templates that you can fork and import the gsap-trial NPM package for using any of the bonus plugins: 

• React (please read this article!)
• Next
• Svelte
• Sveltekit
• Vue
• Nuxt

 

Please share the StackBlitz link directly to the file in question (where you've put the GSAP code) so we don't need to hunt through all the files. 

 

Once we see an isolated demo, we'll do our best to jump in and help with your GSAP-specific questions. ✅

[Rodrigo]

Hi @Thom and welcome to the GSAP Forums!

 

Maybe you can check fastScrollEnd and preventOverlaps in order to see if it helps:

https://gsap.com/docs/v3/Plugins/ScrollTrigger/?page=1#fastScrollEnd

https://gsap.com/docs/v3/Plugins/ScrollTrigger/?page=1#preventOverlaps

 

Thanks for being a Club GSAP member and supporting GSAP! 💚

 

Happy Tweening!