This small script makes it super easy to make sure your CSS grid transitions gracefully from one state to another. If the content of the grid changes, or if the grid or one of its children is updated with the addition or removal of a class, the grid will automatically smoothly transition to its new configuration.

Main Codepen Example

Other Codepen Examples

Just call the wrapGrid method on your grid container, and optionally provide a config object as a second argument. If the grid is removed from the page, the animations will automatically be cleaned up as well.

ES6 Module:

yarn add animate-css-grid

import { wrapGrid } from animateCSSGrid

const grid = document.querySelector(".grid");
wrapGrid(grid);

Or from a script tag:

<script src="https://unpkg.com/animate-css-grid@latest"></script>

<script>
  const grid = document.querySelector(".grid");
  animateCSSGrid.wrapGrid(grid, {stagger: true, duration : 600});
</script>

Optional config object:

{
  // default is false
  stagger: true,
  // default is 250 ms
  duration: 500
  // default is 'Quadratic.InOut'
  easing: 'Sinusoidal.InOut'
}

Available easing functions.

Two functions are returned by the wrapGrid call that you probably won't need to use:

import { wrapGrid } from animateCSSGrid

const grid = document.querySelector(".grid");
const { unwrapGrid, forceGridAnimation } = wrapGrid(grid);

// if you want the grid to transition after updating an inline style
// you need to call forceGridAnimation
grid.style.width = '500px'
forceGridAnimation()

// if you want to remove animations but not the grid itself
unwrapGrid()

1. The updates to the grid will have to come from addition or removal of a class or element. Currently, inline style updates will not trigger transitions. (Although you can manually trigger transitions in that case by calling forceGridAnimation())
2. If a grid item has children, they should be surrounded by a single container element.

Example:

<!-- grid style applied via a class -->
<ul class="some-grid-class-that-changes">
  <!-- each grid item has a single direct child -->
  <li class="grid-item">
    <div>
      <h3>Item title</h3>
      <div>Item body</div>
    </div>
  </li>
<div>

The script registers a MutationObserver that activates when the grid or one of its children adds or loses a class or element. It uses the FLIP animation technique to smoothly update the grid, applying a counter transform to the children of each item so that they do not appear distorted while the transition occurs.

It should work on container elements without CSS grid applied as well, but was developed with CSS grid in mind.