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Layout animations

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Motion makes it simple to animate an element's size and position between different layouts. With animateLayout and the data-layout prop, you can perform layout animations, and by using data-layout-id you can create seamless "magic motion" effects between two separate elements.

Layout animations can animate previously unanimatable CSS values, like switching justify-content between flex-start and flex-end.

animateLayout(() => {
  element.style.justifyContent = isOn ? "flex-start" : "flex-end"
})

Install

animateLayout is in early access. You need to be a Motion+ member to install.

First, add the motion-plus package to your project using your private token.

npm install "https://api.motion.dev/registry.tgz?package=motion-plus&version=2.6.1&token=YOUR_AUTH_TOKEN"

Once installed, animateLayout can be imported via motion-plus/animate-layout.

animateLayout requires motion@12.29.2 or above.

Once out of alpha, animateLayout will be imported from the main "motion" package.

Usage

Import animateLayout from "motion-plus/animate-layout".

import { unstable_animateLayout as animateLayout } from "motion-plus/animate-layout"

Wrap any layout change with animateLayout:

animateLayout(() => {
  document.getElementById("box").style.width = "500px"
})

Any elements tagged with a data-layout will animate to their new size and position.

<div id="toggle-handle" data-layout />

Configure transitions

Pass a Motion transition to animateLayout to configure the animation.

animateLayout(update, { type: "spring" })

Scope layout animations

We can scope layout animations to a specific part of a page by passing a selector or element(s) as the first argument:

// Either as a selector
animateLayout(".container", update)

// Or an element/element list
const container = document.getElementById("#container")
animateLayout(container, update)

Shared element transitions

It's possible to animate from one element to another different element by removing an existing element and then adding a new element to the DOM with matching data-layout-id attributes:

<ul class="tabs">
  <li>
    First
    <div data-layout-id="underline" class="underline"></div>
  </li>
  <li>Second</li>
  <li>Third</li>
</ul>

const firstItem = document.querySelector(".tabs li:first-child")
const underline = firstItem.querySelector("[data-layout-id='underline']")
underline.remove()
 
 // Add underline to second item
const secondItem = document.querySelector(".tabs li:nth-child(2)")
const newUnderline = document.createElement("div")
newUnderline.setAttribute("data-layout-id", "underline")
newUnderline.className = "underline"
secondItem.appendChild(newUnderline)

Crossfade

You can also crossfade between two elements with matching data-layout-id attributes by leaving the initial element in the DOM.

<div class="cards">
  <div data-layout-id="card-1" class="card">
    <h3>Card Title</h3>
  </div>
</div>
<div class="modal-container"></div>

animateLayout(() => {
  container.innerHTML = expandedView
  // Add expanded version to modal container
  const modalContainer = document.querySelector(".modal-container")
  modalContainer.innerHTML = `
    <div data-layout-id="card-1" class="modal">
      <h3>Card Title</h3>
      <p>Expanded content...</p>
    </div>
  `
})

In the React version of layout animations, we can also crossfade back to the original element by removing the new element using <AnimatePresence>. As there is not yet an <AnimatePresence> equivalent for vanilla JS, this is not yet possible.

Configure shared transitions

We can override the default layout transition using the .shared() method.

Pass it the data-layout-id of the matching pair we want to animate and a Motion transition:

animateLayout(update)
  .shared("card", { duration: 0.5 })

Controls

animateLayout is an async function that returns AnimationPlaybackControls like animate.

Therefore, we can play, pause, set time, or power the animation with a scroll animation.

const controls = async animateLayout(update)

animation.pause()
animation.play()
animation.cancel()
animation.time = 0.4
await animation.finished

scroll(controls)

View animations

Easing functions

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