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# vue2-transitions
## [Demo](https://binarcode.github.io/vue2-transitions)
## [Codesandbox](https://codesandbox.io/s/v80qxp7nwy)
[](https://npmjs.com/package/vue2-transitions) [](https://npmjs.com/package/vue2-transitions) [](https://circleci.com/gh/cristij/vue2-transitions/tree/master)
✨ Reusable component transitions
## Why :question:
- Brings only the code that you need.
*Many alternative solutions import the whole animate.css library. Vue2-transitions is minimalistic and lets
you import only the transitions that you need in your app*
Each transition component has **~2kb** (non-minified js+css or **~400 bytes** gzipped) and you can import only the ones you really need.
- Configurable.
*You can configure animation enter and leave durations as well as all the props of the native Vue `transition` components through props*
- Easy to use.
*No extra classes*
## Install :coffee:
```bash
npm i vue2-transitions
yarn add vue2-transitions
```
CDN: [UNPKG](https://unpkg.com/vue2-transitions/) | [jsDelivr](https://cdn.jsdelivr.net/npm/vue2-transitions/) (available as `window.Vue2Transitions`)
## Usage :rocket:
```vue
<template>
<fade-transition>
<div class="box" v-show="show">
<p>Fade transition</p>
</div>
</fade-transition>
</template>
<script>
import {FadeTransition} from 'vue2-transitions'
export default {
components: {
FadeTransition
}
}
</script>
```
## Global usage
```js
import Transitions from 'vue2-transitions'
Vue.use(Transitions)
```
## List of available transitions
- FadeTransition
- ZoomCenterTransition
- ZoomXTransition
- ZoomYTransition
- CollapseTransition
- ScaleTransition
- SlideXLeftTransition
- SlideXRightTransition
- SlideYUpTransition
- SlideYDownTransition
## Props
```js
props: {
/**
* Transition duration. Number for specifying the same duration for enter/leave transitions
* Object style {enter: 300, leave: 300} for specifying explicit durations for enter/leave
*/
duration: {
type: [Number, Object],
default: 300
},
/**
* Whether the component should be a `transition-group` component.
*/
group: Boolean,
/**
* Transition tag, in case the component is a `transition-group`
*/
tag: {
type: String,
default: 'span'
},
/**
* Transform origin property https://tympanus.net/codrops/css_reference/transform-origin/.
* Can be specified with styles as well but it's shorter with this prop
*/
origin: {
type: String,
default: ''
},
/**
* Element styles that are applied during transition. These styles are applied on @beforeEnter and @beforeLeave hooks
*/
styles: {
type: Object,
default: () => {
return {
animationFillMode: 'both',
animationTimingFunction: 'ease-out'
}
}
}
}
```
## Group transitions
Each transition can be used as a `transition-group` by adding the `group` prop to one of the desired transitions.
```html
<fade-transition group>
<!--keyed children here-->
</fade-transition>
```
Gotchas/things to watch:
1. Elements inside `group` transitions should have `display: inline-block` or must be placed in a flex context:
[Vue.js docs reference](https://vuejs.org/v2/guide/transitions.html#List-Move-Transitions)
2. Each transition has a `move` class [move class docs](https://vuejs.org/v2/guide/transitions.html#List-Move-Transitions).
Unfortunately the duration for the move transition cannot be configured through props. By default each transition has a `move` class associated
with `.3s` transition duration:
- Zoom
```css
.zoom-move{
transition: transform .3s ease-out;
}
```
- Slide
```css
.slide-move{
transition: transform .3s ease-out;
}
```
- Scale
```css
.scale-move{
transition: transform .3s cubic-bezier(.25,.8,.50,1);
}
```
- Fade
```css
.fade-move{
transition: transform .3s ease-out;
}
```
If you want to configure the duration, just redefine the class for the transition you use with the desired duration.
## Contribution
### Defining a new transition
The codebase is fairly simple and contains mostly `.vue` components. If you want to add a new transition to the collection follow these steps:
1. Fork the repo.
2. Create a new branch.
3. Create a new `.vue` file (together with a folder if necessary)
4. Define the transition.
```html
<template>
<component :is="componentType"
v-bind="$attrs"
v-on="hooks"
enter-active-class="enterAnimationClassHere"
move-class="move-class"
leave-active-class="leaveAnimationClassHere">
<slot></slot>
</component>
</template>
<script>
import {baseTransition} from '../mixins/index.js'
export default {
name: 'transition-name-here',
mixins: [baseTransition]
}
</script>
<style>
// Your styles for animations here.
</style>
```
5. Import the transition in `src/index.js` and place it in the `export default` object.
6. Add the name of the new transition (camelCase) in the `transitionOptions` array inside `example/App.vue`
Besides the properties described above, you can pass in any other [Transition props or events](https://vuejs.org/v2/api/#transition)
**Note** Overriding hooks (especially `beforeEnter` or `beforeLeave`) may cause unwanted effects.
## License
MIT © [cristijora](https://github.com/cristijora)
## Special thanks to
@euvl (The UI for list transitions in the demo is inspired by [vue-js-grid demo](https://github.com/euvl/vue-js-grid) )