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guodaxia103 / anime

JavaScript Animation Engine

Home Page:http://animejs.com

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anime.js

Anime (/ˈæn.ə.meɪ/) is a lightweight JavaScript animation library. It works with any CSS Properties, individual CSS transforms, SVG or any DOM attributes, and JavaScript Objects.

⚠️ Migrating from v1.x ? Make sure to read the changelog ⚠️

Main features

Demos and examples

Browser support

Chrome Safari IE / Edge Firefox Opera
24+ 6+ 10+ 32+ 15+

Usage

$ npm install animejs
# OR
$ bower install animejs
import anime from 'animejs'

Or manually download and link anime.min.js in your HTML:

<script src="anime.min.js"></script>

Then start animating:

anime({
  targets: 'div',
  translateX: [
    { value: 100, duration: 1200 },
    { value: 0, duration: 800 }
  ],
  rotate: '1turn',
  backgroundColor: '#FFF',
  duration: 2000,
  loop: true
});

API

Targets

The targets property defines the elements or JS Objects to animate.

Types Examples
CSS Selectors 'div', '.item', 'path', '#el path' ...
DOM Element document.querySelector('.item')
NodeList document.querySelectorAll('.item')
Object {prop1: 100, prop2: 200}
Array ['div', '.item', domNode]

➜ Targets examples

Animatable properties

Types Examples
CSS opacity, backgroundColor, fontSize ...
Transforms translateX, rotate, scale ...
Object properties Any Object property containing numerical values
DOM attributes Any DOM attributes containing numerical values
SVG attributes Any SVG attributes containing numerical values

➜ Animatable properties examples

CSS

Any CSS properties can be animated:

anime({
  targets: 'div',
  left: '80%', // Animate all divs left position to 80%
  opacity: .8, // Animate all divs opacity to .8
  backgroundColor: '#FFF' // Animate all divs background color to #FFF
});

➜ CSS properties example

Individual CSS transforms

CSS transforms can be animated individually:

anime({
  targets: 'div',
  translateX: 250, // Animate all divs translateX property to 250px
  scale: 2, // Animate all divs scale to 2
  rotate: '1turn' // Animate all divs rotation to 1 turn
});

➜ CSS Transforms example

JavaScript Object properties

Any Object property containing a numerical value can be animated:

var myObject = {
  prop1: 0,
  prop2: '0%'
}

anime({
  targets: myObject,
  prop1: 50, // Animate the 'prop1' property from myObject to 50
  prop2: '100%' // Animate the 'prop2' property from myObject to 100%
});

➜ Object properties example

DOM Attributes

Any DOM Attribute containing a numerical values can be animated:

<input value="0">
anime({
  targets: input,
  value: 1000, // Animate the input value to 1000
  round: 1 // Remove decimals by rounding the value
});

➜ DOM Attributes example

SVG Attributes

Any SVG Attribute containing a numerical values can be animated:

<svg width="128" height="128" viewBox="0 0 128 128">
  <polygon points="64 68.73508918222262 8.574 99.9935923731656 63.35810017508558 67.62284396863708 64 3.993592373165592 64.64189982491442 67.62284396863708 119.426 99.9935923731656"></polygon>
</svg>
anime({
  targets: 'polygon',
  points: '64 128 8.574 96 8.574 32 64 0 119.426 32 119.426 96'
});

➜ SVG Attributes example

Property parameters

Defines duration, delay and easing for each property animations.
Can be set globally, or individually to each properties:

Names Defaults Types Info
duration 1000 number, function millisecond
delay 0 number, function millisecond
easing 'easeOutElastic' function See Easing functions
elasticity 500 number, function Range [0 - 1000]
round false number, boolean, function Power of 10 
anime({
  translateX: {
    value: 250,
    duration: 800
  },
  rotate: {
    value: 360,
    duration: 1800,
    easing: 'easeInOutSine'
  },
  scale: {
    value: 2,
    duration: 1600,
    delay: 800,
    easing: 'easeInOutQuart'
  },
  delay: 250 // All properties except 'scale' inherit 250ms delay
});

➜ Property parameters examples

Function based property parameters

Get different property parameters for every target of the animation.
The function accepts 3 arguments: target, index, targetsLength.

anime({
  targets: 'div',
  translateX: 250,
  rotate: 180,
  duration: function(target) {
    // Duration based on every div 'data-duration' attribute
    return target.getAttribute('data-duration');
  },
  delay: function(target, index) {
    // 100ms delay multiplied by every div index, in ascending order
    return index * 100;
  },
  elasticity: function(target, index, totalTargets) {
    // Elasticity multiplied by every div index, in descending order
    return 200 + ((totalTargets - index) * 200);
  }
});

➜ Function based parameters examples

Animation parameters

Parameters relative to the animation to specify the direction, the number of loops or autoplay.

Names Defaults Types
loop false number, boolean
direction 'normal' 'normal', 'reverse', 'alternate'
autoplay true boolean 
anime({
  targets: 'div',
  translateX: 100,
  duration: 2000,
  loop: 3, // Play the animation 3 times
  direction: 'reverse', // Play the animation in reverse
  autoplay: false // Animation paused by default
});

➜ Animation parameters examples

Property values

Single value

Defines the end value of the animation.
Start value is the original target value, or default transforms value.

Types Examples Infos
Number 100 Automatically add original or default unit if needed
String '10em', '1turn', 'M21 1v160', '50%' Must contains at least one numerical value
Relative values '+=100px', '-=20em', '*=4' Add, subtract or multiply the original property value
Colors '#FFF', 'rgb(255,0,0)', 'hsl(100, 20%, 80%)' Accepts 3 or 6 hex digit, rgb, or hsl values

➜ Values examples

anime({
  targets: 'div',
  translateX: 100, // Add 'px' by default (from 0px to 100px)
  rotate: '1turn', // Use 'turn' as unit (from 0turn to 1turn)
  scale: '*=2', // Multiply the current scale value by 2 (from 1 to (1 * 2))
  backgroundColor: '#FFF', // Animate the background color to #FFF (from 'rgb(0,0,0)' to 'rgb(255,255,255)')
  duration: 1500
});

From > To values

Force the animation to start at a certain value.

anime({
  targets: 'div',
  translateX: [100, 200], // Translate X from 100 to 200
  rotate: ['.5turn', '1turn'], // Rotate from 180deg to 360deg
  scale: ['*=2', 1], // Scale from 2 times the original value to 1,
  backgroundColor: ['rgb(255,0,0)', '#FFF'], // Will transition the background color from red to white
  duration: 1500
});

➜ Specific initial value example

Function based values

Same as function based property parameters.
Get different values for every target and property of the animation.
The function accepts 3 arguments: target, index, targetsLength.

anime({
  targets: 'div',
  translateX: function(el) {
    return el.getAttribute('data-x');
  },
  translateY: function(el, i) {
    return 50 + (-50 * i);
  },
  scale: function(el, i, l) {
    return (l - i) + .25;
  },
  rotate: function() { return anime.random(-360, 360); },
  duration: function() { return anime.random(800, 1600); },
  delay: function() { return anime.random(0, 1000); }
});

➜ Function based value example

Keyframes

Keyframes are defined using an Array of property Object.
Instance's duration is divided by the number of keyframes of each properties if not specified.

anime({
  targets: 'div',
  translateX: [
    { value: 250, duration: 1000, delay: 500, elasticity: 0 },
    { value: 0, duration: 1000, delay: 500, elasticity: 0 }
  ],
  translateY: [
    { value: -40, duration: 500, elasticity: 100 },
    { value: 40, duration: 500, delay: 1000, elasticity: 100 },
    { value: 0, duration: 500, delay: 1000, elasticity: 100 }
  ],
  scaleX: [
    { value: 4, duration: 100, delay: 500, easing: 'easeOutExpo' },
    { value: 1, duration: 900, elasticity: 300 },
    { value: 4, duration: 100, delay: 500, easing: 'easeOutExpo' },
    { value: 1, duration: 900, elasticity: 300 }
  ],
  scaleY: [
    { value: [1.75, 1], duration: 500 },
    { value: 2, duration: 50, delay: 1000, easing: 'easeOutExpo' },
    { value: 1, duration: 450 },
    { value: 1.75, duration: 50, delay: 1000, easing: 'easeOutExpo' },
    { value: 1, duration: 450 }
  ]
});

➜ Specific keyframes properties example

Timeline

Basic timeline

Play animations in sequence by creating a timeline:

var myTimeline = anime.timeline();

A timeline accepts the same parameters as an animation: direction, loop and autoplay.

var myTimeline = anime.timeline({
  direction: 'alternate',
  loop: 3,
  autoplay: false
});

Add animations to the timeline with .add() :

myTimeline
  .add({
    targets: '.square',
    translateX: 250
  })
  .add({
    targets: '.circle',
    translateX: 250
  })
  .add({
    targets: '.triangle',
    translateX: 250
  });

Access timeline children animations with myTimeline.children

➜ Basic timeline example

Timeline animations offsets

offset defines the starting time of an animation on the timeline.

Relative offset

Defines starting time relative to the previous animations duration.

Types Examples Infos
+= '+=100' Starts 100ms after the previous animation ends
-= '-=100' Starts 100ms before the previous animation ends
*= '*=2' Starts at 2 times the previous animations duration 
myTimeline
  .add({
    targets: '.square',
    translateX: 250
  })
  .add({
    targets: '.circle',
    translateX: 250,
    offset: '-=600' // Starts 600ms before the previous animation ends
  })
  .add({
    targets: '.triangle',
    translateX: 250,
    offset: '-=800' // Starts 800ms before the previous animation ends
  });

➜ Relative offset example

Absolute offset

Defines an absolute starting time on the timeline with a number.

myTimeline
  .add({
    targets: '.square',
    translateX: 250,
    offset: 1000 // Starts at 1000ms
  })
  .add({
    targets: '.circle',
    translateX: 250,
    offset: 500 // Starts at 500ms
  })
  .add({
    targets: '.triangle',
    translateX: 250,
    offset: 0 // Starts at 0ms
  });

➜ Absolute offset example

Playback controls

Play, pause, restart, seek animations or timelines.

Play / Pause

var playPauseAnim = anime({
  targets: 'div',
  translateX: 250,
  direction: 'alternate',
  loop: true,
  autoplay: false // prevent the instance from playing
});

playPauseAnim.play(); //  Manually play
playPauseAnim.pause(); //  Manually pause

➜ Play / Pause example

Restart

var restartAnim = anime({
  targets: 'div',
  translateX: 250,
  direction: 'alternate',
  loop: true,
  autoplay: false
});

restartAnim.restart(); // Restart the animation and reset the loop count / current direction

➜ Restart example

Reverse

var reverseAnim = anime({
  targets: 'div',
  translateX: 250,
  direction: 'alternate',
  loop: true
});

reverseAnim.reverse(); // Change the animation direction

➜ Reverse example

Seek

Change animations or timelines current time.

var seekAnim = anime({
  targets: 'div',
  translateX: 250,
  delay: function(el, i, l) { return i * 100; },
  elasticity: 200,
  autoplay: false
});

seekAnim.seek(500); // Set the animation current time to 500ms

➜ Seek example

Callbacks

Execute a function at the beginning, during or when an animation or timeline is completed.

Names Types Arguments Info
update function animation Object Called at time = 0
begin function animation Object Called after animation delay is over
complete function animation Object Called only after all the loops are completed

➜ Callbacks examples

Update

update() is called on every frame while the instance is playing.

var myAnimation = anime({
  targets: '#update .el',
  translateX: 250,
  delay: 1000,
  update: function(anim) {
    console.log(anim.currentTime + 'ms'); // Get current animation time with `myAnimation.currentTime`, return value in ms.
    console.log(anim.progress + '%'); // Get current animation progress with `myAnimation.progress`, return value in %
  }
});

➜ Update example

Begin

begin() is called once after the delay is finished.

var myAnimation = anime({
  targets: '#begin .el',
  translateX: 250,
  delay: 1000,
  begin: function(anim) {
    console.log(anim.began); // true after 1000ms
  }
});

Check if the animation has begun with myAnimation.began, return true or false.

➜ Begin example

Run

run() is called every frame after the delay is finished.

var myAnimation = anime({
  targets: '#run .el',
  translateX: 250,
  delay: 1000,
  run: function(anim) {
    console.log(anim.currentTime);
  }
});

➜ Run example

Complete

complete() is called once after the animation is finished.

var myAnimation = anime({
  targets: '#complete .el',
  translateX: 250,
  complete: function(anim) {
    console.log(anim.completed);
  }
});

Check if the animation has finished with myAnimation.completed, return true or false.

➜ Complete example

Promises

myAnimation.finished returns a Promise object which will resolve once the animation has finished running.

➜ Promises example

SVG

Motion path

Translate and rotate DOM elements along an SVG path:

// Create a path `Object`
var path = anime.path('#motionPath path');

var motionPath = anime({
  targets: '#motionPath .el',
  translateX: path('x'), // Follow the x values from the path `Object`
  translateY: path('y'), // Follow the y values from the path `Object`
  rotate: path('angle')  // Follow the angle values from the path `Object`
});

➜ Motion path example

Morphing

Animate the transition between two SVG shapes:

<svg class="shape" width="128" height="128" viewBox="0 0 128 128">
  <polygon points="64 68.64 8.574 100 63.446 67.68 64 4 64.554 67.68 119.426 100"></polygon>
</svg>
var svgAttributes = anime({
  targets: '.shape polygon',
  points: '64 128 8.574 96 8.574 32 64 0 119.426 32 119.426 96'
});

Shapes need to have the same number of points.

➜ Morphing example

Line drawing

Line drawing animation of an SVG shape:

anime({
  targets: '.shape path',
  strokeDashoffset: [anime.setDashoffset, 0]
});

➜ Line drawing example

Easing functions

The easing parameter can accept either a string or a custom Bézier curve coordinates (array).

Types Examples Infos
String 'easeOutExpo' Built in function names
Array [.91,-0.54,.29,1.56] Custom Bézier curve coordinates ([x1, y1, x2, y2])

Built in functions

Linear easing: 'linear'

Penner's equations:

easeIn easeOut easeInOut
easeInQuad easeOutQuad easeInOutQuad
easeInCubic easeOutCubic easeInOutCubic
easeInQuart easeOutQuart easeInOutQuart
easeInQuint easeOutQuint easeInOutQuint
easeInSine easeOutSine easeInOutSine
easeInExpo easeOutExpo easeInOutExpo
easeInCirc easeOutCirc easeInOutCirc
easeInBack easeOutBack easeInOutBack
easeInElastic easeOutElastic easeInOutElastic

➜ Built in easing functions examples

Usage:

anime({
  targets: 'div',
  translateX: 100,
  easing: 'easeOutExpo' // Default 'easeOutElastic'
});

Elasticity of Elastic easings can be configured with the elasticity parameters:

anime({
  targets: 'div',
  translateX: 100,
  easing: 'easeOutElastic',
  elasticity: 600 // Default 500, range [0-1000]
});

➜ Elasticity examples

Custom Bézier curves

Define a Bézier curve with an Array of 4 coordinates:

anime({
  targets: 'div',
  translateX: 100,
  easing: [.91,-0.54,.29,1.56]
});

Custom Bézier curves coordinates can be generated here https://matthewlein.com/ceaser/

➜ Custom Bézier curves example

Defining custom functions

Expand the built in easing functions from anime.easings.

// Add custom function
anime.easings['myCustomEasingName'] = function(t) {
  return Math.pow(Math.sin(t * 3), 3);
}

// Usage
anime({
  targets: 'div',
  translateX: 100,
  easing: 'myCustomEasingName'
});

// add custom Bézier curve function
anime.easings['myCustomCurve'] = anime.bezier([.91,-0.54,.29,1.56]);

// Usage
anime({
  targets: 'div',
  translateX: 100,
  easing: 'myCustomCurve'
});

➜ Custom easing functions example

Helpers

anime.speed = x

Change all animations speed (from 0 to 1).

anime.speed = .5; // Slow down all animations by half of their original speed

anime.running

Return an Array of all active Anime instances.

anime.running;

anime.remove(target)

Remove one or multiple targets from the animation.

anime.remove('.item-2'); // Remove all elements with the class 'item-2'

anime.getValue(target, property)

Get current valid value from an element.

anime.getValue('div', 'translateX'); // Return '100px'

anime.path(pathEl)

Create a path Function for motion path animation.
Accepts either a DOM node or CSS selector.

var path = anime.path('svg path', 'translateX'); // Return path(attribute)

➜ Motion path example

anime.setDashoffset(pathEl)

An helper for line drawing animation.
Sets the 'stroke-dasharray' to the total path length and return its value.

anime({
  targets: '.shape path',
  strokeDashoffset: [anime.setDashoffset, 0]
});

➜ Line drawing example

anime.easings

Return the complete list of built in easing functions

anime.easings;

anime.bezier(x1, x2, y1, y2)

Return a custom Bézier curve easing function

anime.bezier(x1, x2, y1, y2); // Return function(t)

anime.timeline()

Create a timeline to synchronise other Anime instances.

var timeline = anime.timeline();
timeline.add([instance1, instance2, ...]);

➜ Timeline examples

anime.random(x, y)

Generate a random number between two numbers.

anime.random(10, 40); // Will return a random number between 10 and 40

====

MIT License. © 2017 Julian Garnier.

Thanks to Animate Plus and Velocity that inspired anime.js API, BezierEasing and jQuery UI for the easing system. Tim Branyen For the Promise implementation.

About

JavaScript Animation Engine

http://animejs.com

License:MIT License

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