Preloader Curtain Lift

Solid panels sweep across the screen to cover the old page, then retract to reveal the new one.

Add a "Curtain / Panel Wipe" page transition (also called a page wipe or staggered panels) to [where].
Solid panels should sweep in one after another to cover the old page, the page should switch while it is fully covered, and the panels should carry on out of view to reveal the new one: bold and smooth.
Never show the new page before the panels have covered the old one, and use a plain fade instead for users who prefer reduced motion.

A number counts from a start value to a target value when it becomes visible.

Add a "Number Ticker" (also called count up or an animated counter) to [where].
When the number comes into view, it should count up from zero to its target, fast at first and slowing gently as it lands.
Use fixed-width digits so nothing around it jitters, count only once, and give screen readers and users who prefer reduced motion the final value right away.

The element glides out past a container edge and disappears.

Add a "Slide Out" exit animation (also called slide out up or slide out down) to [where].
The element should glide out past its container edge and disappear, staying fully opaque: quick, accelerating as it leaves.
Clip it at the container edge, hide it from keyboard and screen readers once it is out of view, and hide it instantly when the user prefers reduced motion (prefers-reduced-motion).

Outgoing and incoming content move together along the X, Y or Z axis with fades to show spatial relation.

Add a "Shared Axis" page transition (also called shared axis X/Y/Z) to [where].
Moving forward, the old content should slide a short way to one side and fade out quickly while the new content slides in from the other side and fades in just after; moving back reverses the direction.
Keep the travel short so it only hints at direction, and match the axis to the navigation: sideways for siblings, vertical for steps, depth for drilling in.

A matching element, such as a thumbnail, morphs in position and size from one page to the next.

Add a "Shared Element Transition" (also called a hero transition or view-transition-name morph) to [where].
When moving to the next page, the matching element, such as a thumbnail, should smoothly move and grow into its place on the new page while the rest of the content crossfades, and shrink back when returning.
Give the matching elements on both pages one shared identity so they pair up correctly, and fall back to a plain crossfade where the browser can't morph them.

The new page slides in from one side while the old page slides out, with direction following navigation depth.

Add a "Slide Page Transition" (also called push / pop or a directional slide) to [where].
Going forward, the new page should push in from the side while the old page slides out the other way; going back, both should move in the opposite direction: smooth, easing in and out.
Tie the direction to navigation depth, including the browser's back button, and keep the page from scrolling sideways during the slide.