# react-alert > alerts for React [![travis build](https://img.shields.io/travis/schiehll/react-alert.svg?style=flat-square)](https://travis-ci.org/schiehll/react-alert) [![version](https://img.shields.io/npm/v/react-alert.svg?style=flat-square)](http://npm.im/react-alert) ## Demo [![Edit l2mo430lzq](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/s/l2mo430lzq) ## Installation ```bash $ npm install --save react-alert ``` ### Templates You can provide your own alert template if you need to. Otherwise you can just plug in one of the following: - [Basic](https://github.com/schiehll/react-alert-template-basic) - [Dark](https://github.com/schiehll/react-alert-template-oldschool-dark) - [Material UI](https://github.com/MMMayC/react-alert-template-mui) Feel free to submit a PR with the link for your own template. To get started, try installing the basic one: ```bash $ npm install --save react-alert react-alert-template-basic ``` ### Peer dependencies This package expect the following peer dependencies: ``` "react": "^16.8.1" "react-dom": "^16.8.1" ``` So make sure that you have those installed too! ## Usage First you have to wrap your app with the Provider giving it the alert template and optionally some options: ```js // index.js import React from 'react' import { render } from 'react-dom' import { transitions, positions, Provider as AlertProvider } from 'react-alert' import AlertTemplate from 'react-alert-template-basic' import App from './App' // optional configuration const options = { // you can also just use 'bottom center' position: positions.BOTTOM_CENTER, timeout: 5000, offset: '30px', // you can also just use 'scale' transition: transitions.SCALE } const Root = () => ( ) render(, document.getElementById('root')) ``` Then import the `useAlert` hook to be able to show alerts: ```js // App.js import React from 'react' import { useAlert } from 'react-alert' const App = () => { const alert = useAlert() return ( ) } export default App ``` And that's it! You can also use it with a HOC: ```js import React from 'react' import { withAlert } from 'react-alert' const App = ({ alert }) => ( ) export default withAlert()(App) ``` ## Options You can pass the following options as props to `Provider`: ```js offset: PropTypes.string // the margin of each alert position: PropTypes.oneOf([ 'top left', 'top right', 'top center', 'middle left', 'middle', 'middle right', 'bottom left', 'bottom right', 'bottom center' ]) // the position of the alerts in the page timeout: PropTypes.number // timeout to alert remove itself, if set to 0 it never removes itself type: PropTypes.oneOf(['info', 'success', 'error']) // the default alert type used when calling this.props.alert.show transition: PropTypes.oneOf(['fade', 'scale']) // the transition animation containerStyle: PropTypes.Object // style to be applied in the alerts container template: PropTypes.oneOfType([PropTypes.element, PropTypes.func]).isRequired // the alert template to be used ``` Note that the position, type and transition strings are available as constants which can be imported the next way: ```js import { positions, transitions, types } from 'react-alert' ``` and have such values: ```js export const positions = { TOP_LEFT: 'top left', TOP_CENTER: 'top center', TOP_RIGHT: 'top right', MIDDLE_LEFT: 'middle left', MIDDLE: 'middle', MIDDLE_RIGHT: 'middle right', BOTTOM_LEFT: 'bottom left', BOTTOM_CENTER: 'bottom center', BOTTOM_RIGHT: 'bottom right' } export const types = { INFO: 'info', SUCCESS: 'success', ERROR: 'error' } export const transitions = { FADE: 'fade', SCALE: 'scale' } ``` Here's the defaults: ```js offset: '10px' position: positions.TOP_CENTER timeout: 0 type: types.INFO transition: transitions.FADE, containerStyle: { zIndex: 100 } ``` Those options will be applied to all alerts (please, also have a look at [edge-cases](#showing-alerts-in-different-positions-at-the-same-time)) ## Api After getting the `alert` with the `useAlert` hook, this is what you can do with it: ```js // show const alert = alert.show('Some message', { timeout: 2000, // custom timeout just for this one alert type: 'success', onOpen: () => { console.log('hey') }, // callback that will be executed after this alert open onClose: () => { console.log('closed') } // callback that will be executed after this alert is removed }) // info // just an alias to alert.show(msg, { type: 'info' }) const alert = alert.info('Some info', { timeout: 2000, // custom timeout just for this one alert onOpen: () => { console.log('hey') }, // callback that will be executed after this alert open onClose: () => { console.log('closed') } // callback that will be executed after this alert is removed }) // success // just an alias to alert.show(msg, { type: 'success' }) const alert = alert.success('Some success', { timeout: 2000, // custom timeout just for this one alert onOpen: () => { console.log('hey') }, // callback that will be executed after this alert open onClose: () => { console.log('closed') } // callback that will be executed after this alert is removed }) // error // just an alias to alert.show(msg, { type: 'error' }) const alert = alert.error('Some error', { timeout: 2000, // custom timeout just for this one alert onOpen: () => { console.log('hey') }, // callback that will be executed after this alert open onClose: () => { console.log('closed') } // callback that will be executed after this alert is removed }) // remove // use it to remove an alert programmatically alert.remove(alert) // removeAll // use it to remove all alerts programmatically alert.removeAll() ``` ## Using a custom alert template If you ever need to have an alert just the way you want, you can provide your own template! Here's a simple example: ```js import React from 'react' import { render } from 'react-dom' import { Provider as AlertProvider } from 'react-alert' import App from './App' // the style contains only the margin given as offset // options contains all alert given options // message is the alert message // close is a function that closes the alert const AlertTemplate = ({ style, options, message, close }) => (

{options.type === 'info' && '!'} {options.type === 'success' && ':)'} {options.type === 'error' && ':('} {message}

) const Root = () => ( ) render(, document.getElementById('root')) ``` Easy, right? ## Using a component as a message You can also pass in a component as a message, like this: ```js alert.show(

Some Message

) ``` ## Showing alerts in different positions at the same time First of all, if have a need to separate the logic of showing alerts in different positions at the same time it is possible to use multiple AlertProviders in one project and nest them across the DOM tree. Also you can use different Contexts to get the references to each type of alert separately. ```js import React, { createContext } from 'react' import { render } from 'react-dom' import { useAlert, positions, Provider as AlertProvider } from 'react-alert' import AlertTemplate from 'react-alert-template-basic' const TopRightAlertContext = createContext() const App = () => { const alert = useAlert() const topRightAlert = useAlert(TopRightAlertContext) return (

) } const Root = () => ( ) render(, document.getElementById('root')) ``` Another use case is when you don't want to nest a couple of AlertProviders because it will somehow complicate management of alerts (for example when you need to show alerts in more than three different positions). In this case you can pass the position directly to the alert. The alerts without individual position property will take it from the Provider. Instead, passing the position to methods `show`, `success`, `info`, `error` will overlap the Provider's position. Passing the property `position` will look like this: ```js alert.show('Oh look, an alert!', { position: positions.BOTTOM_LEFT }) ``` An example of showing alerts simultaneously in three different positions: ```js import React from 'react' import { render } from 'react-dom' import { Provider as AlertProvider, useAlert, positions, transitions } from 'react-alert' import AlertTemplate from 'react-alert-template-basic' const alertOptions = { offset: '25px', timeout: 3000, transition: transitions.SCALE } const App = () => { const alert = useAlert() const showAlert = () => { alert.show('Oh look, an alert!', { position: positions.BOTTOM_LEFT }) //alert will be shown in bottom left alert.show('Oh look, an alert!', { position: positions.BOTTOM_RIGHT }) //alert will be shown in bottom right alert.show('Oh look, an alert!') //alert will use the Provider's position `top right` } return } const Root = () => ( ) render(, document.getElementById('root')) ```

	Stars	Issues	Version	Updated	Created
react-alert	608	23	7.0.3	3 years ago	8 years ago
react-messages	1	6	1.3.2	6 years ago	10 years ago
react-notification			6.8.5	4 years ago	9 years ago
react-toastify	12,146	103	10.0.5	a month ago	7 years ago

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