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enzyme.md Normal file
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---
title: Enzyme
category: React
---
## ReactWrapper
```js
wrap = shallow(<MyComponent />) // => ReactWrapper (shallow)
wrap = mount(<MyComponent />) // => ReactWrapper (full)
```
### Traversing
```js
wrap.find('button') // => ReactWrapper
wrap.filter('button') // => ReactWrapper
wrap.not('span') // => ReactWrapper (inverse of filter())
wrap.children() // => ReactWrapper
wrap.parent() // => ReactWrapper
wrap.closest('div') // => ReactWrapper
wrap.childAt(0) // => ReactWrapper
wrap.at(0) // => ReactWrapper
wrap.first() // => ReactWrapper
wrap.last() // => ReactWrapper
```
```js
wrap.get(0) // => ReactElement
wrap.getNode() // => ReactElement
wrap.getNodes() // => Array<ReactElement>
wrap.getDOMNode() // => DOMComponent
```
### Actions
```js
wrap.simulate('click')
```
### React components
```js
wrap.setState({ ... })
wrap.setProps({ ... })
wrap.setContext({ ... })
wrap.state() // => Any (get state)
wrap.props() // => object (get props)
wrap.context() // => Any (get context)
wrap.instance() // => ReactComponent
```
### Mount
```js
wrap.mount()
wrap.unmount()
wrap.update() // calls forceUpdate()
```
### Tests
```js
wrap.debug() // => string
wrap.html() // => string
wrap.text() // => string
wrap.type() // => string | function
wrap.name() // => string
wrap.is('.classname') // => boolean
wrap.hasClass('class') // => boolean
wrap.exists() // => boolean
wrap.contains(<div />) // => boolean
wrap.contains([ <div /> ]) // => boolean
wrap.containsMatchingElement(<div />) // => boolean
wrap.containsAllMatchingElements([ <div /> ]) // => boolean
wrap.containsAnyMatchingElements([ <div /> ]) // => boolean
```
## References
- <https://github.com/airbnb/enzyme/blob/master/docs/api/mount.md>

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article:tag
```
### Favicon
```html
<link rel="icon" type="image/png" href="/assets/favicon.png">
```
### Web app
```html
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black"> <!-- black | black-translucent | default -->
```
### Apple-only
```html
<meta name="format-detection" content="telephone=no">
<meta name='format-detection' content='telephone=no'>
```
## Progressive web apps
### Add to homescreen
```html
<meta name='mobile-web-app-capable' content='yes'>
<meta name='apple-mobile-web-app-capable' content='yes'>
<meta name='apple-mobile-web-app-status-bar-style' content='black'> <!-- black | black-translucent | default -->
```
### [Theme color](https://developers.google.com/web/updates/2014/11/Support-for-theme-color-in-Chrome-39-for-Android)
```html
<meta name='theme-color' content='#ff00ff'>
```
### [Manifest](https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/)
```html
<link rel='manifest' href='/manifest.json'>
```
### [Icons](https://developers.google.com/web/fundamentals/design-and-ui/browser-customization/)
```html
<!-- Minimal -->
<link rel='icon' type='image/png' href='favicon@32.png'>
<link rel='icon' sizes='192x192' href='icon@192.png'>
<link rel='apple-touch-icon' href='icon@152.png'>
<meta name='msapplication-square310x310logo' content='icon@310.png'>
<!-- Apple -->
<link rel='apple-touch-icon' href='touch-icon-iphone.png'>
<link rel='apple-touch-icon' sizes='76x76' href='touch-icon-ipad.png'>
<link rel='apple-touch-icon' sizes='120x120' href='touch-icon-iphone-retina.png'>
<link rel='apple-touch-icon' sizes='152x152' href='touch-icon-ipad-retina.png'>
<!-- Microsoft -->
<meta name='msapplication-square70x70logo' content='icon_smalltile.png'>
<meta name='msapplication-square150x150logo' content='icon_mediumtile.png'>
<meta name='msapplication-wide310x150logo' content='icon_widetile.png'>
```
Chrome on Android recommends [192x192](https://developers.google.com/web/updates/2014/11/Support-for-theme-color-in-Chrome-39-for-Android).
### Reference
* https://dev.twitter.com/docs/cards
* https://developers.facebook.com/docs/opengraphprotocol/#types
* <https://dev.twitter.com/docs/cards>
* <https://developers.facebook.com/docs/opengraphprotocol/#types>