Why use it?

tween object value.

#### Live Demo

Installation

``sh
npm install lesca-object-tweener --save
`

Usage

`javascript
import Tweener, { Bezier } from 'lesca-object-tweener';

// use single tween
const tweener = new Tweener({
from: { top: 0, left: 0 },
to: { top: 500, left: 500 },
duration: 1000,
delay: 1000,
easing: Bezier.linear,
onUpdate: (e) => console.log(e), // {top:0~500, left:0~500}
onComplete: (e) => console.log(e), // { top: 500, left: 500 }
}).play();

tweener
.add({
to: { top: 1000 },
duration: 1000,
delay: 1000,
easing: Bezier.easeInOutQuint,
onStart: () => alert('start'),
onUpdate: (e) => console.log(e), // {top:0~1000, left:500}
onComplete: (e) => console.log(e), // {top:1000, left:500}
})
.play();
`

`javascript
// use multiple tween
const tweener = new Tweener();

[
{ top: 0, left: 0 },
{ top: 100, left: 100 },
].forEach((data) => {
tweener.add({
from: { top: 0 }, // first loop will add "from". Second time tweener will ignore "from"
to: { top: 100 },
duration: 0,
easing: Bezier.easeInOutQuint,
onUpdate: (e) => console.log(e), // { top:0~100 }
onComplete: (e) => console.log(e), // { top:100 }
});
});
tweener.play(); // Need to run play when new constructor without any params
``

Development

$3

| Methods | options | description | default |
| :------------------------------------- | :-----: | :---------------: | ------: |
| new Tweener( params:_object_ ) | params | new Tweener class | |
| .add(params:_object_) | params | tween object | |
| .stop() | | stop tween | |

$3

| Properties | type | description | default |
| :-------------------- | :------: | :-------------------: | -----------: |
| params.from | object | object value = number | |
| params.to | object | object value = number | |
| params.duration | number | tween duration | 1000 |
| params.delay | number | tween delay | 0 |
| params.easing | array | cubic-bezier 4 values | easeOutQuart |
| params.onUpdate | function | call by frame | void |
| params.onComplete | function | call when end | void |
| params.onStart | function | call when start | void |

$3

- maintain if necessary

references

css-cubic-bezier-generator

bezier-easing