[BUG] Site flickering on Firefox but not Edge

[ziidonato]

1. Read the FAQs 👇

2. Describe the bug
My site flickers on firefox, but not on edge.

Give a clear and concise description of what the bug is.

3. IMPORTANT: Provide a CodeSandbox reproduction of the bug
It decides to work with minimal representation, but you can clearly see it with the whole site (it's one page don't worry)

Look at components/base/PageOverlay, components/base/List, and components/base/Portal to see the usage.

A CodeSandbox minimal reproduction will allow us to quickly follow the reproduction steps. Without one, this bug report won't be accepted.

4. Steps to reproduce

Steps to reproduce the behavior:

1. Refresh the page and see PageOverlay flicker
2. Click on one of the cards and watch it flicker
3. Click on the dropdown and watch it flicker

5. Expected behavior
No flicker, just smooth transition

A clear and concise description of what you expected to happen.

6. Video or screenshots

If applicable, add a video or screenshots to help explain the bug.

7. Environment details

If applicable, let us know which OS, browser, browser version etc you're using.
Windows Firefox 114.0.1, Edge version 114.0.1823.51

FAQs

Framer Motion won't install

Framer Motion 7+ uses React 18 as a minimum. If you can't upgrade React, install the latest version of Framer Motion 6.

height: "auto" is jumping

Animating to/from auto requires measuring the DOM. There's no perfect way to do this and if you have also applied padding to the same element, these measurements might be wrong.

The recommended solution is to move padding to a child element. See this issue for the full discussion.

Type error with AnimateSharedLayout

AnimateSharedLayout was deprecated in 5.0. Refer to the upgrade guide for instructions on how to remove.

Preact isn't working

Framer Motion isn't compatible with Preact.

AnimatePresence isn't working

Have all of its immediate children got a unique key prop that remains the same for that component every render?

// Bad: The index could be given to a different component if the order of items changes
<AnimatePresence>
  {items.map((item, index) => <Component key={index} />)}
</AnimatePresence>

// Good: The item ID is unique to each component
<AnimatePresence>
  {items.map((item, index) => <Component key={item.id} />)}
</AnimatePresence>

Is the AnimatePresence correctly outside of the controlling conditional? AnimatePresence must be rendered whenever you expect an exit animation to run - it can't do so if it's unmounted!

// Bad: AnimatePresence is unmounted - exit animations won't run
{isVisible && (
  <AnimatePresence>
    <Component />
  </AnimatePresence>
)}

// Good: Only the children are unmounted - exit animations will run
<AnimatePresence>
  {isVisible && <Component />}
</AnimatePresence>

[mattgperry]

I'm gonna close for now as I think this is one I probably won't be able to do much with. However from looking at your site I notice the arrows are missing icons before the flash and I think there's something to do with those loading in that coincides with the flash, maybe Firefox has a problem rerendering like that mid-animation