How do I run stagger animation only once

[battleaxe10000]

Hi,

I'm trying to make a stagger effect on the landingpage.

The idea is, that the stagger displays when the user enters the site, and then no more.

The problem is when you click on a link and then get back to the landingpage. The landingpage will then reload and play the animation again (which it shouldn't).

I tried with "window.onload = function(){}". This works regarding only loading once, but in regard it completely removes the wanted background (since the animation doesn't run).

 

So, with this in mind, I should have an animation that run once, and then stays in that "after run" state.

I'm thinking something like:

const [hasRun, setHasRun] = useState(false);
inside the onload function:
setHasRun(true)

But this feels a bit hacky.

 

This is not the first time I encounter this problem, so I would really appreciate some help to solve this.

Thank you very much!

 

https://codesandbox.io/s/gsap-satgger-1usqn

[OSUblake]

Hi battleaxe,

 

You're going to need to some way to store if the animation has already run at the global level. You can use something like your code snippet, or maybe sessionStorage, which can hold values throughout the life of the page.

https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage

[battleaxe10000]

Thank you very much OSUblake 👍

[battleaxe10000]

I thought I could share the solution I did to this, if anyone else needs it.

 

In my Home.js:

const Home = () => {
    const [loading, setLoading] = useState(false);

    window.onload = function () {
        gsap.to('#first', { duration: 1.3, delay: .1, top: '0', ease: 'Expo.easeInOut' })
        gsap.to('#second', { duration: 1.3, delay: .3, top: '0', ease: 'Expo.easeInOut' })
        gsap.to('#third', { duration: 1.3, delay: .6, top: '0', ease: 'Expo.easeInOut' })
        gsap.to('#fourth', { duration: 1.3, delay: .9, top: '0', ease: 'Expo.easeInOut' })
        gsap.fromTo('#innerSection', 1.3, { opacity: 0, scale: 0.2 }, { opacity: 1, scale: 1 }, 2)
        setLoading(true)
    }

    return (
        <Section loading={loading}>
            <Overlays id="first" />
            <Overlays id="second" />
            <Overlays id="third" />
            <Overlays id="fourth" />
        </Section>
    )
}

 

I am using Styled-Components, so in my style-file:

background: ${({ loading }) => (loading ? "tranparent" : "black")};