react-move

readme

Beautifully and deterministically animate anything in react.

Features

• 12kb! (minified)
• Supports React-Native
• Animate anything you want
• List Transitions eg. "enter", "update", and "leaving"
• Staggering and Stagger Groups
• Custom Easing
• Supports auto interpolation of
  • Numbers
  • Colors
  • SVG paths
  • Any string with embedded numbers
  • Arrays of any of these
  • Objects of any of these
  • Arrays of objects of any of these... you get the point
  • Anything d3-interpolate can handle

Demos

• Codepen
• Storybook

Installation

$ yarn add react-move
# or
$ npm install react-move --only=dev

CDN

<script src='https://npmcdn.com/react-move@latest/react-move.js'></script>

Animate

A component for animating any single object.

Props

• data={ Object } | Required
  • An object of keys that that you wish to animate. When these values are changed, each and every value in this object will be interpolated (unless its key is found in the ignore prop)
• default={ Object }
  • An object of keys to be used as the initial state of the animation.
• duration={ Number } | 500
  • The duration in milliseconds for each item to animate
• easing={ string | function } | easeCubicOut
  • A string that references a d3-ease function, or a custom easing function that receives a progress decimal and returns a new progress decimal.
• ignore={ []String } | false
  • Any keys found in this array will not be interpolated, and instead will be immediately set to the new value
• flexDuration={ Boolean } | false
  • Avoid dropping frames at all cost by dynamically increasing the duration of the animation loop becomes overwhelmed.
• immutable={ Boolean } | true
  • By default, strict equality === between the old data and new data is used to detect when an animation should occur. If you wish, you can disable immutable mode which falls back to using JSON.stringify to determine if an animation should occur.

Example

import React from 'react'
import { Animate } from 'react-move'

<Animate
  // Set some default data
  default={{
    scale: 0,
    color: 'blue'
  }}
  // Update your data to whatever you want
  data={{
    scale: Math.random() * 1,
    color: _.sample(['red', 'blue', 'yellow']),
  }}
  duration={800}
  easing='easeQuadIn' // anything from https://github.com/d3/d3-ease
>
  {data => (
    <div
      style={{
        transform: `scale(${data.scale})`,
        background: data.color
      }}
    >
      {data.scale * 100}
    </div>
  )}
</Animate>

Transition

A component that enables animating multiple elements, including enter and exit animations.

Props

• data={ []Objects } | [] | Required
  • An array of objects you wish to track. These are not necessarily the exact values you wish to animate, but will used to produce the animated values.
• getKey={ function } | (d, i) => i
  • A function that returns a unique identifier for each item. This is used to track enter, update and leave states/groups.
• update={ function } | Required
  • A function that returns the state for an item if it is neither entering or leaving the list of items.
• enter={ function } | () => null
  • A function that returns the state for an item if it is entering the list of items. If nothing is returned, the update state is used.
• leave={ function } | () => null
  • A function that returns the state for an item if it is leaving the list of items. If nothing is returned, the update state is used.
• duration={ Number } | 500
  • The duration in milliseconds for each item to animate
• easing={ string | function } | easeCubicOut
  • A string that references a d3-ease function, or a custom easing function that receives a progress decimal and returns a new progress decimal.
• stagger={ Number } | 0
  • Number of milliseconds for each item to wait relative to it's preceding item.
• staggerGroups={ Boolean } | false
  • Delays item animation relative to status groups instead of the entire list. The relative groups used in this mode are entering, updating and leaving.
• ignore={ []String } | false
  • Any keys found in this array will not be interpolated, and instead will be immediately set to the new value
• flexDuration={ Boolean } | false
  • Avoid dropping frames at all cost by dynamically increasing the duration of the animation loop becomes overwhelmed.

Example

import React from 'react'
import { Transition } from 'react-move'

const items = _.filter(items, (d, i) => i > Math.random() * 10)

<Transition
  // pass an array of items to "data"
  data={items}
  // use "getKey" to return a unique ID for each item
  getKey={(item, index) => index}
  // the "update" function returns the items normal state to animate
  update={item => ({
    translate: 1,
    opacity: 1,
    color: 'grey'
  })}
  // the "enter" function returns the items origin state when entering
  enter={item => ({
    translate: 0,
    opacity: 0,
    color: 'blue'
  })}
  // the "leave" function returns the items destination state when leaving
  leave={item => ({
    translate: 2,
    opacity: 0,
    color: 'red'
  })}
  //
  duration={800}
  easing='easeQuadIn' // anything from https://github.com/d3/d3-ease
  stagger={200} // you can also stagger by a percentage of the animation
  staggerGroup // use this prop to stagger by enter/exit/update group index instead of by overall index
>
  {data => ( // the child function is passed an array of itemStates
    <div>
      {data.map(item => {
        // data[0] === { key: 0, data: 0, state: {...} }
        return (
          <div
            key={item.key}
            style={{
              transform: `translateX(${100 * item.state.translate}px)`,
              opacity: item.state.opacity,
              color: item.state.color
            }}
          >
            {item.data} - {Math.round(item.percentage * 100)}
          </div>
        )
      })}
    </div>
  )}
</Transition>

Custom Easing

If you would rather use a different easing function or just build your own, you can! Simply pass a function to the easing prop and you're off!

<Animate
  easing={(t) => { // This is Chart.js's easeOutBounce function :)
    if ((t /= 1) < (1 / 2.75)) {
      return 1 * (7.5625 * t * t)
    } else if (t < (2 / 2.75)) {
      return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75)
    } else if (t < (2.5 / 2.75)) {
      return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375)
    }
    return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375)
  }}
>

Contributing

To suggest a feature, create an issue if it does not already exist. If you would like to help develop a suggested feature follow these steps:

• Fork this repo
• $ yarn
• $ yarn run storybook
• Implement your changes to files in the src/ directory
• View changes as you code via our React Storybook localhost:8000
• Make changes to stories in /stories, or create a new one if needed
• Submit PR for review

Scripts

• $ yarn run storybook Runs the storybook server
• $ yarn run test Runs the test suite
• $ yarn run prepublish Builds for NPM distribution
• $ yarn run docs Builds the website/docs from the storybook for github pages

Used By