Hosting Command Palette: Simplify animation logic for Safari

[sejas]

• Related to Hosting Command Palette: Add banner on /sites #85564
• Reported on p1705396640039889-slack-C9EJ7KSGH

Proposed Changes

• Improve the banner animation on Safari

Testing Instructions

• Navigate to /sites on your desktop using Safari, Chrome and Firefox
• Observe the banner animation works as expected.

Screencasts

Safari

hcp-banner-safari-animation.mp4

Chrome

hcp-banner-chrome-animation.mp4

Firefox

hcp-banner-firefox-animation.mp4

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• https://wpcalypso.wordpress.com/devdocs/docs/testing/index.md for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-ajp-p2)?

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-94748

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-94748&env=jetpack

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~17 bytes removed 📉 [gzipped])

name                     parsed_size           gzip_size
sites-dashboard                -38 B  (-0.0%)       -9 B  (-0.0%)
import-hosted-site-flow        -38 B  (-0.0%)       -8 B  (-0.0%)
import-flow                    -38 B  (-0.0%)       -8 B  (-0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[matticbot]

This PR modifies the release build for the following Calypso Apps:

For info about this notification, see here: PCYsg-OT6-p2

• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug update/hosting-command-palette-improve-banner-safari-animation on your sandbox.

[javierarce]

LGTM!

Screen.Recording.2024-01-16.at.12.22.45.mov

[katinthehatsite]

I checked on Safari on my end and it looks great. Nice work adjusting the opacity values within keyframes!