b-tween

A simple but powerful tweening engine for Javascript.

Install

npm i b-tween

Usage

ES Module

import BTween from 'b-tween';
const tween = new BTween({
  from: {
    left: 0
  },
  to: {
    left: 700
  },
  duration: 500,
  easing: 'bounceOut',
  onUpdate: (keys) => {
    // You can do everything with keys
    block.style.left = keys.left + 'px';
  }
});
tween.start();

Commonjs

const BTween = require('b-tween');
...

Browser

https://unpkg.com/b-tween/dist/b-tween.umd.js

<script src="https://unpkg.com/b-tween/dist/b-tween.umd.js"></script>
<script>
  const tween = new BTween({
    ...
  });
  tween.start();
</script> 

Api

new Tween(options)

options.from (object)

options.to (object)

options.duration (number)

options.delay (number)

options.easing (string)

• linear
• quadIn
• quadOut
• quadInOut
• cubicIn
• cubicOut
• cubicInOut
• quartIn
• quartOut
• quartInOut
• quintIn
• quintOut
• quintInOut
• sineIn
• sineOut
• sineInOut
• bounceIn
• bounceOut
• bounceInOut

options.onStart ( function(keys) {} )

options.onUpdate ( function(keys) {} )

options.onFinish ( function(keys) {} )

Start Animation

const tween = new Btween({...});
tween.start();

LICENSE

MIT © PengJiyuan