@lottielab/lottie-player

v1.1.2

Published

2 months ago

Versatile Lottie animation player based on lottie-web. Supports HTML (via Web Components) and React.

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davidlottielab

alistairthomson

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Lottielab Player

@lottielab/lottie-player is a lightweight and versatile web player for Lottie animations exported from Lottielab.

✨Features

Simple and easy-to-use API.
Lightweight: <50KiB compressed (~190KiB minified)
Web component: use the player easily within any HTML content
React support: also provides a separate React Lottie player component
Interactive: ⚡ supports Interactive Lotties created in Lottielab, backed by a powerful and versatile state machine implementation.
Robust: uses lottie-web, the industry-standard Lottie library
Secure: eliminates insecure lottie-web features, such as expressions
Type-safe: written in TypeScript with strict typings available.

Demo

Check out the numerous examples in the Playground!.

To run the demos locally, clone the repository and then run npm install && npm run build && npm run playground.

⚙️ Installation

npm

npm install --save @lottielab/lottie-player

yarn

yarn add @lottielab/lottie-player

📜 Usage

🔵 Web Component (HTML, universal)

The easiest way to get started is to import the script directly from the Lottielab CDN, preferably inside your <head> element:

<script src="https://cdn.lottielab.com/s/[email protected]/player-web.min.js"></script>

Then, to play a Lottie:

<lottie-player src="https://cdn.lottielab.com/l/8ok2qzQDyoFeyf.json" autoplay loop>
</lottie-player>

If you already have a build pipeline, you might prefer loading the script from within your code. You can simply import the file:

import '@lottielab/lottie-player/web';
// or: import '@lottielab/lottie-player';

...and then use the <lottie-player> component from anywhere, like in the example above.

Since the player is a web component, it can be used from any HTML content, which means you can readily use it even from frameworks for which it doesn't provide a custom component, such as Vue, Angular, Svelte, and others.

The player can also be used programatically like any other HTML element:

import Lottie from '@lottielab/lottie-player/web';
// or: import { LottieWeb as Lottie } from '@lottielab/lottie-player';

window.addEventListener('load', () => {
  // create the element
  const lottie = new Lottie();

  // set attributes
  lottie.setAttribute('src', 'path/to/your-animation.json');
  lottie.setAttribute('autoplay', 'false');

  // add to the DOM
  document.body.appendChild(lottie);

  // full animation API is now available:
  lottie.speed = 1.5;
  lottie.play();
  // and so on...
});

API

The animation playback can be controlled in depth using a simple-to-use API. Click below to see the full docs.

HTML Attributes

These are attributes that can be set on the <lottie-player> component in HTML.

| Name | Type | Description | | --- | --- | --- | | src | string | The source path or url for the Lottie animation. | | autoplay | boolean | Whether the animation should autoplay. | | loop | boolean or number | Whether the animation should loop (true or false). Alternatively, pass a number to set the number of loops an animation should play before pausing. | | speed | number | Speed of the animation. 1 represents the normal (real-time) speed of the animation; values less than 1 are slower than normal, and higher values are faster. For example, 0.5 plays twice as slow and 2 plays twice as fast. | direction | 1, -1, forwards, backwards | Direction in which the animation plays. 1 is the same as forwards and -1 is the same as backwards. | preserveAspectRatio | valid preserveAspectRatio SVG value | The value to use for the preserveAspectRatio attribute on the rendered SVG. Use none to allow the Lottie to stretch. Default is xMidYMid meet.

Example usage:

<lottie-player
    src="https://cdn.lottielab.com/l/8ok2qzQDyoFeyf.json"
    autoplay
    loop="true"
    speed="0.5"
    direction="backwards">
</lottie-player>

Methods

These methods provide controls for playing, stopping, pausing, seeking, and looping the Lottie animation.

| Name | Parameters | Description | | ---- | ---------- | ----------- | | play() | / | Plays the animation. | | pause() | / | Pauses the Lottie animation at the current frame. | | stop() | / | Pauses the animation and resets it to the beginning. | | seek(timeSeconds) | timeSeconds: number | Moves the animation to a specific point in time, in seconds. | | seekToFrame(frame) | frame: number | Moves the animation to a specific frame. | | loopBetween(timeSeconds1, timeSeconds2) | timeSeconds1: number, timeSeconds2: number | Loops between two points in time (in seconds) within the Lottie animation. | | loopBetweenFrames(frame1, frame2) | frame1: number, frame2: number | Loops between two frames within the Lottie animation. | | toInteractive() | / | Converts the Lottie to an interactive Lottie. You can then use the .interactivity field to access the interactivity API. See docs. | toPlayback() | / | Converts the Lottie to an ordinary, non-interactive Lottie.

Example usage:

// get the reference to an animation from the DOM
// (it's also possible to create the player programmatically)
const lottie = document.querySelector('lottie-player#my-lottie');

// seek to 5 seconds into the animation
lottie.seek(5);

// pause
lottie.pause();

Properties

These properties can be accessed and modified on the component class to control various aspects of the Lottie animation.

| Name | Type | Description | | ---- | ---------- | ----------- | | playing | boolean | Whether the Lottie animation is playing at the moment. Setting it has a similar effect as calling play() or pause(). | | currentTime | number | Current position, in seconds, of the Lottie animation playhead. Setting it has a similar effect as calling seek(). | | currentFrame | number | Current position, in frames, of the Lottie animation playhead. Settting it has a similar effect as calling seekToFrame(). | | frameRate | number (read-only) | Returns the preferred frame rate of the Lottie. Note that, being an implicit vector format, the animation technically has an infinite frame rate. | duration | number (read-only) | Duration of the Lottie animation in seconds. | | durationFrames | number (read-only) | Duration of the Lottie animation in frames. | | loop | boolean or number | Whether the animation should loop (true or false). Alternatively, it can be a number to set the number of loops an animation should play before pausing. | | direction | 1 or -1 | Direction in which the animation is played. A value of 1 plays the animation in a forwards direction, whereas -1 plays the animation in reverse. | | speed | number | Current speed of the animation. 1 is normal speed; values above 1 are faster and below are slower. For example, 0.5 is twice as slow and 2 is twice as fast. | animation | AnimationItem from lottie-web | Returns the underlying lottie-web instance. Note that the exact behavior of the underlying instance is not covered by the semver guarantee. | animationData | Lottie JSON | Returns the actual underlying Lottie JSON. | interactivity | LottielabInteractivity, undefined if not interactive | Provides access to the interactivity API if the Lottie is interactive.

// get the reference to an animation from the DOM
// (it's also possible to create the player programmatically)
const lottie = document.querySelector('lottie-player#my-lottie')

// play the animation
lottie.playing = true;

// seek to specific time
lottie.currentTime = 3; // seeks to 3 seconds

// get the total duration in frames
let animationDuration = lottie.durationFrames;
console.log(`Duration in frames: ${animationDuration}`); // Duration in frames: 400

Events

You can wait for the player to load by .addEventListener('load', fn), or handle loading errors using .addEventListener('error', fn):

const lottie = document.querySelector('lottie-player#my-lottie')

lottie.addEventListener('load', () => {
  console.log('Lottie is loaded now!');
});

lottie.addEventListener('error', (e) => {
  console.log('Lottie failed to load!', e);
});

Subscription to all other events is done using .on() and .off() on the player:

const lottie = document.querySelector('lottie-player#my-lottie')
lottie.on('finish', function listener() => {
  console.log('Playback finished.')
  lottie.off('finish', listener); // Stop listening to event
});

For some events, the handler will receive an argument.

| Name | Argument | Description | | ---- | ---------- | ----------- | | time | TimeEvent | Triggered whenever time passes for the Lottie. See TimeEvent for more details. | loop | none | Triggered when Lottie playback loops around. | finish | none | Triggered when the Lottie finishes playing and stops.

🔵 React Component

Import the component:

import Lottie from '@lottielab/lottie-player/react';
// or: import { LottieReact as Lottie } from '@lottielab/lottie-player';

Then use it:

const MyComponent = () => <Lottie src="https://cdn.lottielab.com/l/8ok2qzQDyoFeyf.json" />;

Alternatively, you can provide a deserialized Lottie JSON directly, rather than a URL. This can be easier, since it can integrate better with your build pipeline and bundler:

// note: make sure to setup JSON imports in your build pipeline
import myAnimation from './path/to/your/animation.json';

const MyComponent = () => <Lottie lottie={myAnimation} />;

API

The component allows some setup via props, and can provide the underlying player for deeper control. Click below to see the full docs.

The React component offers several layers of control for greater flexibility, from simple fire-and-forget autoplay to full single-direction control over which frame is displayed.

Props

The following props are common across all methods of controlling the playbacck:

| Name | Type | Description | | ---- | ---------- | ----------- | | lottie | Lottie animation data | Deserialized Lottie JSON of the animation to display. Alternatively, you can pass a URL to fetch the lottie from, see src below. | | src | string | URL from where to load the animation. This can be a relative path, but it will be fetched using an HTTP request, not bundled. See also lottie above. | | ref | React ref | If provided, the ref will be populated with a full player instance capable of controlling the animation. See "Controlling the animation" below. | | preserveAspectRatio | valid preserveAspectRatio SVG value | The value to use for the preserveAspectRatio attribute on the rendered SVG. Use none to allow the Lottie to stretch. Default is xMidYMid meet. |

If you want the Lottie to play autonomously, either set autoplay or playing and any other desired playback settings:

| Name | Type | Description | | ---- | ---------- | ----------- | | autoplay | boolean | Incompatible with playing. Whether the animation should play as soon as the React component is mounted. | | playing | boolean | Incompatible with autoplay. Controls whether the animation is currently playing or paused. | | loop | boolean or number | Whether the animation should loop (true or false). Alternatively, pass a number to set the number of loops an animation should play before pausing. | | direction | 1 or -1 | Direction in which the animation is played. A value of 1 plays the animation in a forwards direction, whereas -1 plays the animation in reverse. | | speed | number | Current speed of the animation. 1 is normal speed; values above 1 are faster and below are slower. For example, 0.5 is twice as slow and 2 is twice as fast. |

For full control (see below), you can pass one of the following props, both of which are incompatible with the above props:

| Name | Type | Description | | ---- | ---------- | ----------- | | time | number | Only in full control mode, see below. Time of the playhead in seconds. | | frame | number | Only in full control mode, see below. Current frame of the playhead. |

Events

The following event handler props can be provided. Some of them will be called with an event argument.

| Name | Argument | Description | | ---- | ---------- | ----------- | | onLoad | none | Called when the Lottie animation loads. | | onError | Error | Called when the Lottie animation fails to load. | | onTime | TimeEvent | Called on each passage of time for the Lottie animation. See the definition of TimeEvent for details. | | onLoop | none | Called when the playback loops around. | | onFinish | none | Called when the playback finishes and stops. | | onTransitionStart | TransitionEvent | Called when a state transition starts (for Interactive Lotties). See INTERACTIVITY.md. | | onTransitionEnd | TransitionEvent | Called when a state transition ends (for Interactive Lotties). See INTERACTIVITY.md. |

Controlling the animation

The single-direction data flow enforced by React means that some features, such as manually pausing and playing the animation or seeking it, are not readily available, since they would require bi-directional data flow.

There are three ways to address this, corresponding to three levels of control.

If you want to opt for a strict single-direction data flow, you can pass a time or frame prop to the component, which will always ensure the animation is at the specified time (in seconds) or frame. In this case, you have to implement your own playback logic if required.
If you want to only control whether or not the Lottie is playing, pass in a playing prop with a boolean value.
For maximum flexibility, you can get access to the underlying player instance by passing a ref:

import Lottie from '@lottielab/lottie-player/react';
import myAnimation from './path/to/your/animation.json';
// For TypeScript, also do:
// import { ILottie } from '@lottielab/lottie-player/react'

const MyComponent = () => {
  const lottieRef = useRef(null); // TypeScript: useRef<ILottie | null>(null)
  return (
    <div>
      <Lottie lottie={myAnimation} ref={lottieRef} autoplay={false} />;
      <button onClick={() => lottieRef.current?.play()}>Play!</button>
    </div>
  );
}

The object provided to your ref will conform to the ILottie interface, which the web component also implements. You can refer to the "Properties" and "Methods" documentation in the Web Component section above.

Note that, using methods and properties of the provided ILottie, it's possible to override the passed-in props.

⚡Interactivity

Full docs: INTERACTIVITY.md

Lottielab Player supports Interactive Lotties out of the box. These Lotties contain a state machine and can change state in response to mouse movement, clicks, or even custom user-defined events.

Providing an Interactive Lottie to the player will automatically activate its interactivity features.

Technically, Interactive Lotties are similar to ordinary Lotties, but they contain additional interactivity information.

Lottielab provides a web-based editor for creating Interactive Lotties with a visual interface and live preview.

Besides loading an Interactive Lottie, the Lottielab Player allows you to inspect and interact with the underlying state machine, or apply a custom interactivity definition to an existing, plain Lottie.

Check out the interactivity documentation in INTERACTIVITY.md.

Development

After cloning the repo, run npm install. To build the web bundle, run npm run build. Changes can be tested using the playground using npm run playground, which will open the playground in your web browser. Then, click on either the react/ or web/ directories and you'll be able to test the corresponding component.

Release checklist

npm install
Bump version in package.json
Bump version of X_LOTTIE_PLAYER in src/common/player.ts
npm run build
npm run playground, check all of the examples with different Lottie URLs. Verify all controls are working.
Create a new git tag: git tag -a vX.X.X -m "Release X.X.X" (replace X.X.X with the semver version)
Create a new release: https://github.com/lottielab/lottie-player/releases/new

License

MIT · Made with ❤️ by Lottielab

Published

Vulnerabilities

Links

Maintainers

Keywords

Readme

Lottielab Player

✨Features

Demo

⚙️ Installation

npm

yarn

📜 Usage

🔵 Web Component (HTML, universal)

API

HTML Attributes

Methods

Properties

Events

🔵 React Component

API

Props

Events

Controlling the animation

⚡Interactivity

Development

Release checklist

License