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https://github.com/cwise89/react-detect-offline
Offline and Online components for React
https://github.com/cwise89/react-detect-offline
Last synced: about 2 months ago
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Offline and Online components for React
- Host: GitHub
- URL: https://github.com/cwise89/react-detect-offline
- Owner: cwise89
- License: mit
- Created: 2017-07-30T20:15:49.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2022-12-07T01:01:01.000Z (almost 2 years ago)
- Last Synced: 2024-04-18T13:48:48.680Z (5 months ago)
- Language: JavaScript
- Homepage:
- Size: 1.48 MB
- Stars: 1,288
- Watchers: 16
- Forks: 99
- Open Issues: 20
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-list - react-detect-offline
README
[](https://www.npmjs.com/package/react-detect-offline)
[](https://www.npmjs.com/package/react-detect-offline)
### Offline and Online components for React
Components that track [offline and online state](https://developer.mozilla.org/en-US/docs/Online_and_offline_events). Render certain content only when online (or only when offline).
```jsx
import { Offline, Online } from "react-detect-offline";
const App = () => (
Only shown when you're online
Only shown offline (surprise!)
);
```
### Demo
Check out [chris.bolin.co/offline](https://chris.bolin.co/offline) for a simple example ([source code](https://github.com/chrisbolin/offline/blob/master/src/App.js)).
### Components
#### Simple
`` and `` - Components that render their children only when the browser is online/offline.
```jsx
You're offline right now. Check your connection.
```
#### Advanced
` ...}/>` - Component that calls its `render` prop every time the connection state changes. The `render` prop is supplied with an object with an `online` boolean value. _Recommended for more complex cases, e.g. when styles need to be changed with connection status._
```jsx
(
You are currently {online ? "online" : "offline"}
)}
/>
```
### Props
``, ``, and `` accept the following props:
| Prop | Type | Description | Default |
| ------------------ | ----------- | --------------------------------- | ------------------------------ |
| `polling` | Obj or Bool | Config for polling fallback [1] | [see below] |
| `polling.enabled` | Boolean | Force polling on or off | Depends on the browser [1] |
| `polling.url` | String | URL to pool for connection status | `"https://ipv4.icanhazip.com"` |
| `polling.interval` | Number | How often (in ms) to poll | `5000` |
| `polling.timeout` | Number | How long (in ms) before timeout | `5000` |
| `onChange` | Function | Called when connection changes | none |
| `children` [2] | Element(s) | Children **not Detector** | none |
| `render` [3] | Func | Render function **Detector only** | none |
[1] Polling is only used as a fallback for browsers that don't support the `"online"` event. Currently these are Chrome on Windows, Firefox on Windows, and Chrome on Linux.
[2] `` and `` only. `` will not render `children`.
[3] `` only
### Browser Support
The [web spec](https://developer.mozilla.org/en-US/docs/Online_and_offline_events) we rely on is supported by IE 9+, Chrome 14+, Firefox 41+, and Safari 5+ - that's [94% of worldwide (98% of US)](http://caniuse.com/#feat=online-status) browser traffic. A polling fallback is used for browsers that don't implement the spec in a useful way (see note [1] in the above Props section).
### Contributing
This package is maintained by [cwise89](https://github.com/cwise89) (and was initially created by [chrisbolin](https://github.com/chrisbolin)).
PRs are welcome!
* Test: `yarn test`
* Build: `yarn build`. Make sure you commit the build file (`dist/index.js`)