Scrolltrigger plugin snaps to start: "botttom bottom" while defined start:"top top" while resizing window in middle of transformation

[P Ravi]

gsap.registerPlugin(ScrollTrigger);
let tmain = gsap.timeline({
scrollTrigger: {
trigger: ".container-lg",
start: "top top",
end: () => innerHeight * 4,
scrub: true,
pin: ".pinclass",
anticipatePin: 1
}
});

<div class="container-xl justify-content-center h-100 d-flex">
<div id="pinclass" class="pinclass">
<img src="images/test.png" style="width:100%;height:100%;background-size: contain;">
</div>

 

 

let say we begin at transformation 8.3 scale.

It works perfectly fine however things get unordered when I am scrolling and it is zooming out ,

here is how it was looking

<div id="pinclass" class="pinclass"
style="transform: scale(8.3333, 8.3333);
left: 262.141px; top: 150.001px;
margin: 0px; max-width: 1387px;
width: 1387px; max-height: 833px;
height: 833px; padding: 0px;
box-sizing: border-box; position: fixed;">

 

however now when we are at transformation scale 6.3 or 7.3 or somewhere in the middle, I chose to resize the window

and in my plugin registration, i specified the start as "top top"  but the moment i resized it, now it exactly act like setting of start: "bottom bottom"

I tried to fix this behaviour by setting javascript the above mentioned '.pinclass' but still it has no effect on it. it still snaps to "bottom bottom", despite "top top".

 

Sorry unable to attach images due to size restriction. 

Unable to decided if it is a bug or my bad practice of using it.

Thanksmyzip.zipmyzip.zipmyzip.zipmyzip.zip

[P Ravi]

the image is of a laptop image where I am trying to zoom other pictures. unfortunately, unable to upload due to size restriction.

[GSAP Helper]

It's pretty tough to troubleshoot without a minimal demo - the issue could be caused by CSS, markup, a third party library, your browser, an external script that's totally unrelated to GSAP, etc. Would you please provide a very simple CodePen or CodeSandbox that demonstrates the issue? 

 

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

 

Here's a starter CodePen that loads all the plugins. Just click "fork" at the bottom right and make your minimal demo: 

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

 

If you're using something like React/Next/Nuxt/Gatsby or some other framework, you may find CodeSandbox easier to use. 

 

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

 

By the way, I noticed this: 

end: () => innerHeight * 4

Which is setting the end scroll value to an exact number but I suspect you probably intended to do this to make it relative to the start?: 

end: () => "+=" + (innerHeight * 4)

🤷‍♂️