# tween.js JavaScript (TypeScript) tweening engine for easy animations, incorporating optimised Robert Penner's equations. [![NPM Version][npm-image]][npm-url] [![CDNJS][cdnjs-image]][cdnjs-url] [![NPM Downloads][downloads-image]][downloads-url] [![Build and Tests][ci-image]][ci-url] More languages: [English](./README.md), [简体中文](./README_zh-CN.md) --- ```html

``` [Try this example on CodePen](https://codepen.io/trusktr/pen/KKGaBVz?editors=1000) # Installation ## From CDN Install from a content-delivery network (CDN) like in the above example. From cdnjs: ```html ``` Or from unpkg.com: ```html ``` Note that unpkg.com supports a semver version in the URL, where the `^` in the URL tells unpkg to give you the latest version 20.x.x. ## Build and include in your project with script tag Currently npm is required to build the project. ```bash git clone https://github.com/tweenjs/tween.js cd tween.js npm install npm run build ``` This will create some builds in the `dist` directory. There are currently two different builds of the library: - UMD : `tween.umd.js` - ES6 Module : `tween.es.js` You are now able to copy tween.umd.js into your project, then include it with a script tag, which will add TWEEN to the global scope, ```html ``` or import TWEEN as a JavaScript module, ```html ``` where `path/to` is replaced with the location where you placed the file. ## With `npm install` and `import` from `node_modules` You can add tween.js as an npm dependency: ```bash npm install @tweenjs/tween.js ``` ### With a build tool If you are using [Node.js](https://nodejs.org/), [Parcel](https://parceljs.org/), [Webpack](https://webpack.js.org/), [Rollup](https://rollupjs.org/), [Vite](https://vitejs.dev/), or another build tool, then you can now use the following to include tween.js: ```javascript import * as TWEEN from '@tweenjs/tween.js' ``` ### Without a build tool You can import from `node_modules` if you serve node_modules as part of your website, using an `importmap` script tag. First, assuming `node_modules` is at the root of your website, you can write an import map: ```html ``` Now in any of your module scripts you can import it by its package name: ```javascript import * as TWEEN from '@tweenjs/tween.js' ``` # Features - Does one thing and one thing only: tween properties - Doesn't take care of CSS units (e.g. appending `px`) - Doesn't interpolate colors - Easing functions are reusable outside of Tween - Can also use custom easing functions # Documentation - [User guide](./docs/user_guide.md) - [Contributor guide](./docs/contributor_guide.md) - [Tutorial](https://web.archive.org/web/20220601192930/http://learningthreejs.com/blog/2011/08/17/tweenjs-for-smooth-animation/) using tween.js with three.js - Also: [libtween](https://github.com/jsm174/libtween), a port of tween.js to C by [jsm174](https://github.com/jsm174) # Examples

	hello world (source)		Bars (source)
	Black and red (source)		Graphs (source)
	Simplest possible example (source)		Video and time (source)
	Array interpolation (source)		Dynamic to, object (source)
	Dynamic to, interpolation array (source)		Dynamic to, large interpolation array (source)
	Repeat (source)		Relative values (source)
	Yoyo (source)		Stop all chained tweens (source)
	Custom functions (source)		Relative start time (source)
	Pause tween (source)		Complex properties (source)
	Animate an array of values (source)

# Tests You need to install `npm` first--this comes with node.js, so install that one first. Then, cd to `tween.js`'s (or wherever you cloned the repo) directory and run: ```bash npm install ``` To run the tests run: ```bash npm test ``` If you want to add any feature or change existing features, you _must_ run the tests to make sure you didn't break anything else. Any pull request (PR) needs to have updated passing tests for feature changes (or new passing tests for new features or fixes) in `src/tests.ts` a PR to be accepted. See [contributing](CONTRIBUTING.md) for more information. # People Maintainers: [Joe Pea (@trusktr)](https://github.com/trusktr). [All contributors](http://github.com/tweenjs/tween.js/contributors). # Projects using tween.js [ Lume

](https://lume.io) [![A-Frame VR](https://tweenjs.github.io/tween.js/assets/projects/10_aframe.png)](https://aframe.io) [![MOMA Inventing Abstraction 1910-1925](https://tweenjs.github.io/tween.js/assets/projects/09_moma.png)](http://www.moma.org/interactives/exhibitions/2012/inventingabstraction/) [![Web Lab](https://tweenjs.github.io/tween.js/assets/projects/08_web_lab.png)](http://www.chromeweblab.com/) [![MACCHINA I](https://tweenjs.github.io/tween.js/assets/projects/07_macchina.png)](http://5013.es/toys/macchina) [![Minesweeper 3D](https://tweenjs.github.io/tween.js/assets/projects/06_minesweeper3d.png)](http://egraether.com/mine3d/) [![ROME](https://tweenjs.github.io/tween.js/assets/projects/05_rome.png)](http://ro.me) [![WebGL Globe](https://tweenjs.github.io/tween.js/assets/projects/04_webgl_globe.png)](http://data-arts.appspot.com/globe) [![Androidify](https://tweenjs.github.io/tween.js/assets/projects/03_androidify.png)](http://www.androidify.com/) [![The Wilderness Downtown](https://tweenjs.github.io/tween.js/assets/projects/01_wilderness.png)](http://thewildernessdowntown.com/) [![Linechart](https://tweenjs.github.io/tween.js/assets/projects/00_linechart.png)](http://dejavis.org/linechart) [npm-image]: https://img.shields.io/npm/v/@tweenjs/tween.js.svg [npm-url]: https://npmjs.org/package/@tweenjs/tween.js [downloads-image]: https://img.shields.io/npm/dm/@tweenjs/tween.js.svg [downloads-url]: https://npmjs.org/package/@tweenjs/tween.js [ci-image]: https://github.com/tweenjs/tween.js/workflows/build%20and%20tests/badge.svg?branch=master [ci-url]: https://github.com/tweenjs/tween.js/actions [cdnjs-image]: https://img.shields.io/cdnjs/v/tween.js.svg [cdnjs-url]: https://cdnjs.com/libraries/tween.js

	Stars	Issues	Version	Updated	Created
@createjs/tweenjs	3,533	11	2.0.0-beta.4	5 years ago	6 years ago
@tweenjs/tween.js	9,646	17	23.1.1	4 months ago	7 years ago
animejs	48,728	223	3.2.2	5 months ago	8 years ago
popmotion			11.0.5	2 years ago	9 years ago

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