ScrollTrigger background color change animation not working well on Safari

[Kanalaetxebarria]

Hello,

 

I'm trying to make an animation that switches the viewport's background color depending on your scrolling position. The animation works great on Chrome and on FireFox, but Safari just looks bad, very laggy and the colors don't transition into the page, but rather just pop up with a delay.

 

Here is my animation code (I am using Vue.js)

 

backgroundAnimation() {
      let $projects = gsap.utils.toArray(this.htmlID + " .project-wrapper");
      let projectListTl = gsap.timeline({
        scrollTrigger: {
          trigger: this.htmlID,
          start: "top center",
          end: "bottom center",
          ease: "none",
          scrub: true,
          markers: false,
          onLeave: ({ progress, direction, isActive }) =>
            document.documentElement.style.setProperty("--background", "white"),
        },
      });
      $projects.forEach(($project, i) => {
        projectListTl.to("html", {
          duration: 0.1,
          "--background": $project.dataset.projectColor,
        });
        projectListTl.to("html", {
          delay: 0.3,
          duration: 0.2,
          "--background": "transparent",
        });
      });
    },
      
      
(The method above runs when there is an update on the component)
  updated: function () {
    this.$nextTick(function () {
      this.backgroundAnimation();
      const self = this;
      ScrollTrigger.matchMedia({
        "(min-width: 1024px)": function () {
          self.scrollAnimation();
        },
      });
    });
  },

Any ideas? Not sure where to start looking even.

 

Thanks!

[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.