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# 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 <script src="https://cdnjs.cloudflare.com/ajax/libs/tween.js/20.0.0/tween.umd.js"></script> <div id="box"></div> <style> #box { background-color: deeppink; width: 100px; height: 100px; } </style> <script> const box = document.getElementById('box') // Get the element we want to animate. const coords = {x: 0, y: 0} // Start at (0, 0) const tween = new TWEEN.Tween(coords, false) // Create a new tween that modifies 'coords'. .to({x: 300, y: 200}, 1000) // Move to (300, 200) in 1 second. .easing(TWEEN.Easing.Quadratic.InOut) // Use an easing function to make the animation smooth. .onUpdate(() => { // Called after tween.js updates 'coords'. // Move 'box' to the position described by 'coords' with a CSS translation. box.style.setProperty('transform', 'translate(' + coords.x + 'px, ' + coords.y + 'px)') }) .start() // Start the tween immediately. // Setup the animation loop. function animate(time) { tween.update(time) requestAnimationFrame(animate) } requestAnimationFrame(animate) </script> ``` [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 <script src="https://cdnjs.cloudflare.com/ajax/libs/tween.js/20.0.0/tween.umd.js"></script> ``` Or from unpkg.com: ```html <script src="https://unpkg.com/@tweenjs/tween.js@^20.0.0/dist/tween.umd.js"></script> ``` 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 <script src="path/to/tween.umd.js"></script> ``` or import TWEEN as a JavaScript module, ```html <script type="module"> import * as TWEEN from 'path/to/tween.es.js' </script> ``` 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 <script type="importmap"> { "imports": { "@tweenjs/tween.js": "/node_modules/@tweenjs/tween.js/dist/tween.es.js" } } </script> ``` 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 <table> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/00_hello_world.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/00_hello_world.png" alt="hello world" /> </a> </td> <td> hello world<br /> (<a href="examples/00_hello_world.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/01_bars.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/01_bars.png" alt="Bars" /> </a> </td> <td> Bars<br /> (<a href="examples/01_bars.html">source</a>) </td> <tr> </tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/02_black_and_red.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/02_black_and_red.png" alt="Black and red" /> </a> </td> <td> Black and red<br /> (<a href="examples/02_black_and_red.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/03_graphs.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/03_graphs.png" alt="Graphs" /> </a> </td> <td> Graphs<br /> (<a href="examples/03_graphs.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/04_simplest.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/04_simplest.png" alt="Simplest possible example" /> </a> </td> <td> Simplest possible example<br /> (<a href="examples/04_simplest.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/05_video_and_time.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/06_video_and_time.png" alt="Video and time" /> </a> </td> <td> Video and time<br /> (<a href="examples/05_video_and_time.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/06_array_interpolation.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/03_graphs.png" alt="Array interpolation" /> </a> </td> <td> Array interpolation<br /> (<a href="examples/06_array_interpolation.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/07_dynamic_to.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/07_dynamic_to.png" alt="Dynamic to, object" /> </a> </td> <td> Dynamic to, object<br /> (<a href="examples/07_dynamic_to.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/07a_dynamic_to_two_array_values.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/07a_dynamic_to.png" alt="Dynamic to, interpolation array" /> </a> </td> <td> Dynamic to, interpolation array<br /> (<a href="examples/07a_dynamic_to_two_array_values.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/07b_dynamic_to_an_array_of_values.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/07b_dynamic_to.png" alt="Dynamic to, large interpolation array" /> </a> </td> <td> Dynamic to, large interpolation array<br /> (<a href="examples/07b_dynamic_to_an_array_of_values.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/08_repeat.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/08_repeat.png" alt="Repeat" /> </a> </td> <td> Repeat<br /> (<a href="examples/08_repeat.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/09_relative_values.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/09_relative.png" alt="Relative values" /> </a> </td> <td> Relative values<br /> (<a href="examples/09_relative_values.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/10_yoyo.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/10_yoyo.png" alt="Yoyo" /> </a> </td> <td> Yoyo<br /> (<a href="examples/10_yoyo.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/11_stop_all_chained_tweens.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/11_stop_all_chained_tweens.png" alt="Stop all chained tweens" /> </a> </td> <td> Stop all chained tweens<br /> (<a href="examples/11_stop_all_chained_tweens.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/12_graphs_custom_functions.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/03_graphs.png" alt="Custom functions" /> </a> </td> <td> Custom functions<br /> (<a href="examples/12_graphs_custom_functions.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/13_relative_start_time.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/13_relative_start_time.png" alt="Relative start time" /> </a> </td> <td> Relative start time<br /> (<a href="examples/13_relative_start_time.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/14_pause_tween.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/14_pause_tween.png" alt="Pause tween" /> </a> </td> <td> Pause tween<br /> (<a href="examples/14_pause_tween.html">source</a>) </td> <td> <a href="http://tweenjs.github.io/tween.js/examples/15_complex_properties.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/15_complex_properties.png" alt="Complex properties" /> </a> </td> <td> Complex properties<br /> (<a href="examples/15_complex_properties.html">source</a>) </td> </tr> <tr> <td> <a href="http://tweenjs.github.io/tween.js/examples/16_animate_an_array_of_values.html"> <img width="100" height="50" src="https://tweenjs.github.io/tween.js/assets/examples/16_animate_an_array_of_values.png" alt="Animate an array of values" /> </a> </td> <td> Animate an array of values<br /> (<a href="examples/16_animate_an_array_of_values.html">source</a>) </td> </tr> </table> # 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 [<img src="./assets/projects/11_lume.jpg" width="100" alt="Lume" />](https://lume.io) [](https://aframe.io) [](http://www.moma.org/interactives/exhibitions/2012/inventingabstraction/) [](http://www.chromeweblab.com/) [](http://5013.es/toys/macchina) [](http://egraether.com/mine3d/) [](http://ro.me) [](http://data-arts.appspot.com/globe) [](http://www.androidify.com/) [](http://thewildernessdowntown.com/) [](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