[](https://badge.fury.io/js/react-native-big-calendar)
# react-native-big-calendar
Cross-platform gcal/outlook like calendar component for React Native.
### ⚠️ Help me to debug this component ⚠️
It's a hard task to debug this library on three platforms. I usually develop with the Web version first, then confirm its functionality with real devices. My PC is Linux and my phone is Android, so on Android it is easy to test, but to debug on iOS, I have to bring my Macbook Pro from my garage and connect my wife's iPhone and test it. Every time I launch my MacBook Pro, it requires updating Xcode or even performing a full system update.. It takes so long time to start debug. As React Native works on iOS better than Android, I ~~always~~ sometimes skip testing it, so there should be a bug on iOS. If you help me debug it, I would much appreciate!
[Components Demo](https://react-native-big-calendar.vercel.app)
# Features
- Cross Platform: Runs on the Web, iOS, Android with the power of React
- Type-safe: Fully written in TypeScript
- Customizable: Able to provide your own theme, and pass your component to render.
- Lightweight: ~9KB (min + gzip), dependency is `dayjs` and `calendarize`
# Install
```
npm install --save react-native-big-calendar
```
Or if you use Yarn:
```
yarn add react-native-big-calendar
```
### Other dependencies
Please ensure peer dependencies are installed.
```sh
npm install react react-native
```
### TypeScript
If you use TypeScript ensure `@types/react` and `@types/react-native` is installed. `react-native-big-calendar` internally uses them.
```sh
npm install --save-dev @types/react @types/react-native
```
### Usage on the Web
If you are using this module on the Web, please install `react-native-web`.
```sh
npm install react-native-web
```
If you are using Create React App, you are ready to go 🎉
For more details, please refer to the official react-native-web installation guide.
https://github.com/necolas/react-native-web
# Getting Started
```typescript
import { Calendar } from 'react-native-big-calendar'
const events = [
{
title: 'Meeting',
start: new Date(2020, 1, 11, 10, 0),
end: new Date(2020, 1, 11, 10, 30),
},
{
title: 'Coffee break',
start: new Date(2020, 1, 11, 15, 45),
end: new Date(2020, 1, 11, 16, 30),
},
]
function App() {
return
}
```
# API Documentation
**Summary**
```typescript
export interface CalendarProps {
events: T
height: number
overlapOffset?: number
hourRowHeight?: number
ampm?: boolean
date?: Date
eventCellStyle?: EventCellStyle
eventCellAccessibilityProps?: AccessibilityProps
eventCellTextColor?: string
allDayEventCellStyle?: allDayEventCellStyle<>
allDayEventCellAccessibilityProps?: AccessibilityProps
calendarCellAccessibilityPropsForMonthView?: AccessiblityProps
allDayEventCellTextColor?: string
calendarContainerStyle?: ViewStyle
calendarCellAccessibilityProps?: AccessibilityProps
headerContainerStyle?: ViewStyle
headerContainerAccessibilityProps?: AccessibilityProps
headerCellAccessibilityProps?: AccessibilityProps
bodyContainerStyle?: ViewStyle
renderEvent?: (
event: T,
touchableOpacityProps: CalendarTouchableOpacityProps,
) => ReactElement | null
renderHeader?: React.ComponentType & { mode: Mode }>
renderHeaderForMonthView?: React.ComponentType
renderMultiDayEventPadding?: (
event: T,
touchableOpacityProps: CalendarTouchableOpacityProps,
) => ReactElement | null
locale?: string
hideNowIndicator?: boolean
mode?: Mode
scrollOffsetMinutes?: number
showTime?: boolean
minHour?: number
maxHour?: number
swipeEnabled?: boolean
weekStartsOn?: WeekNum
weekEndsOn?: WeekNum
onChangeDate?: DateRangeHandler
onPressCell?: (date: Date) => void
onPressDateHeader?: (date: Date) => void
onPressEvent?: (event: ICalendarEvent) => void
eventMinHeightForMonthView?: number
activeDate?: Date
moreLabel?: string
showAdjacentMonths?: boolean
sortedMonthView?: boolean
showVerticalScrollIndicator?: boolean
verticalScrollEnabled?: boolean
timeslots?: number
}
```
`` Props are:
| name | required | type | description |
| -------------------------------------------- | -------- | ----------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `events` | yes | `ICalendarEvent[]` | The events which will be rendered on the calendar. You can extend the type `ICalendarEvent` by providing a value to generic type T (see `./stories/events.tsx` for an example). with optional children to display custom components inside the event, and optional event renderer function to take complete control over the rendered event (advanced feature). Events occurring during the same time range will be layered, offset, and assigned a unique color. |
| `height` | yes | `number` | Calendar height. |
| `hideNowIndicator` | no | `boolean` | Hides the indicator for the current time. By default the now indicator is shown. |
| `hourRowHeight` | no | `number` | Hour row height |
| `onPressEvent` | no | `(event: ICalendarEvent) => void` | Event handler which will be fired when the user clicks an event. |
| `onChangeDate` | no | `([start: Date, end: Date]) => void` | Event handler which will be fired when the current date range changed. |
| `onPressCell` | no | `(date: Date) => void` | Event handler which will be fired when the current date cell is clicked. The minute set to 0. |
| `onLongPressCell` | no | `(date: Date) => void` | Same as above but triggered by a long press. |
| `onPressDateHeader` | no | `(date: Date) => void` | Event handler which will be fired when the user clicks a date from the header. |
| `mode` | no | `'month' \| 'week' \| '3days' \| 'day' \| 'schedule' \| 'custom'` | |
| `eventCellStyle` | no | `ViewStyle \| (event: ICalendarEvent) => ViewStyle` | The style of Event cell. Accepts either style object (static) or function (dynamic). |
| `eventCellAccessiblityProps` | no | `AccessibilityProps` | Accessibility properties of Event cell |
| `eventCellTextColor` | no | `string` | The color of Event cell text. |
| `allDayEventCellStyle` | no | `ViewStyle \| (event: ICalendarEvent) => ViewStyle` | The style of all day Event cell. Accepts either style object (static) or function (dynamic). |
| `allDayEventCellTextColor` | no | `string` | The color of all day Event cell text. |
| `allDayEventCellAccessibilityProps` | no | `AccessibilityProps` | Accessibility properties of all day Event cell text. |
| `calendarCellAccessibilityProps` | no | `AccessibilityProps` | Accessibility properties of cells in calendar body, including the cells for hour. |
| `calendarCellAccessibilityPropsForMonthView` | no | `AccessibilityProps` | Accessibility properties of date cells in calendar body for month view. |
| `headerContentStyle` | no | `ViewStyle` | The style of the Header's content. Accepts a style object (static). |
| `headerContainerAccessibilityProps` | no | `AccessibilityProps` | Accessiblity propertiees for Header container. Use set this to control ScreenReader to identify the entire Header row as a single accessible element |
| `headerCellAccessibilityProps` | no | `AccessibilityProps` | Accessiblity propertiees for Header cell. |
| `dayHeaderStyle` | no | `ViewStyle` | The style of the Header's day numbers. Accepts a style object (static). |
| `dayHeaderHighlightColor` | no | `string` | The style of the Header's highlighted day number. Accepts a style object (static). |
| `weekDayHeaderHighlightColor` | no | `string` | The style of the Header's highlighted week day. Accepts a style object (static). |
| `scrollOffsetMinutes` | no | `number` | Scroll to specific minutes in a day. e.g.) set `480` to scroll to 8am when the calendar rendered. |
| `date` | no | `Date` | Initial date of calendar. Defaults to `new Date` (current time). |
| `onSwipeEnd` | no | `(date: Date) => void` | Event handler which will be fired when swiping left or right. Memoize your function to prevent unnecesary re-renders |
| `swipeEnabled` | no | `boolean` | |
| `showTime` | no | `boolean` | |
| `minHour` | no | `number` | The first hour that will be displayed in week/day modes. |
| `maxHour` | no | `number` | The final hour that will be displayed in week/day modes. |
| `ampm` | no | `boolean` | Use 12 hours time format instead of 24 hours. |
| `weekStartsOn` | no | `0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6` | Which day the week starts on. Sunday is `0`. |
| `weekEndsOn` | no | `0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6` | Which day the week ends on. Sunday is `0`. |
| `locale` | no | `string` | Custom locale. See I18n section |
| `overlapOffset` | no | `number` | Adjusts the indentation of events that occur during the same time period. Defaults to 20 on web and 8 on mobile. |
| `isRTL` | no | `boolean` | Switches the direction of the layout for use with RTL languages. Defaults to false. |
| `renderEvent` | no | `EventRenderer` | Custom event renderer. See the type definition below. |
| `renderHeader` | no | `HeaderRenderer` | Custom header renderer. |
| `eventMinHeightForMonthView` | no | `number` | Minimun height for events in month view. Should match the min-height of your custom events. Defaults to 22. |
| `activeDate` | no | `Date` | Date highlighted in header. Defaults to today (current time). |
| `headerComponent` | no | `ReactElement` | Calendar body header component. |
| `headerComponentStyle` | no | `ViewStyle` | Calendar body header component wrapper styling. Accepts a style object (static) |
| `hourStyle` | no | `TextStyle` | Calendar body hours styling. Accepts a style object (static) |
| `showAllDayEventCell` | no | `boolean` | Boolean for showing/hiding the all day event cell |
| `moreLabel` | no | `string` | String to replace More label in month view. Default: '{moreCount} More'. {moreCount} is replaced by number of extra events |
| `showAdjacentMonths` | no | `boolean` | Boolean for showing/hiding adjacent months in month view. Defaults to true |
| `sortedMonthView` | no | `boolean` | (for performance) Boolean for sorting events in month view. Defaults to true |
| `isEventOrderingEnabled` | no | `boolean` | (for performance) Boolean for sorting events in all view. Defaults to true |
| `renderCustomDateForMonth` | no | `boolean` | Custom renderer for Date Cell |
| `disableMonthEventCellPress` | no | `boolean` | Prevent Month view event cells from being pressed. Defaults to false |
| `itemSeparatorComponent` | no | `ReactElement` | React Component for separate items in `schedule` mode. but not at the top or bottom. Refer [React Native FlatList `ItemSeparatorComponent`](https://reactnative.dev/docs/flatlist#itemseparatorcomponent) for more info. |
| `enrichedEventsByDate` | no | `Record = (
event: ICalendarEvent,
touchableOpacityProps: CalendarTouchableOpacityProps,
) => ReactElement | null
```
For more information, see [Storybook](https://github.com/acro5piano/react-native-big-calendar/blob/main/stories/desktop.stories.tsx)
## ICalendarEventBase
```typescript
interface ICalendarEventBase {
start: Date
end: Date
title: string
children?: ReactElement | null
disabled?: boolean
}
```
## HourRenderer
```typescript
type HourRenderer = {
appm: boolean
hour: number
}
```
## All day events
All day events should start and end on 0 in hour, minutes, and seconds (T00:00:00). For example:
```typescript
{
title: 'all day event',
start: "2021-12-24T00:00:00.000Z",
end: "2021-12-24T00:00:00.000Z", // same date as `start`
}
```
## Using a custom event render function
You can specify custom event render function which receives the calculated `TouchableOpacity` prop and `event`.
- The function `renderEvent` must return a `ReactElement`.
- The component _should_ be wrapped inside a `TouchableOpacity` or _any_ DOM element which accepts positioning and click events (`onPress`, ...).
```typescript
export interface MyCustomEventType {
color: string
}
const renderEvent = (
event: T,
touchableOpacityProps: CalendarTouchableOpacityProps,
) => (
{`My custom event: ${event.title} with a color: ${event.color}`}
)
```
## Displaying event's notes
Your events can contain a prop `children` An example can be found [here](./stories/events.tsx).
```typescript
const eventNotes = useMemo(
() => (
Phone number: 555-123-4567
Arrive 15 minutes early
),
[],
)
export const myEvents: ICalendarEventBase[] = [
{
title: 'Custom reminder',
start: dayjs().set('hour', 16).set('minute', 0).toDate(),
end: dayjs().set('hour', 17).set('minute', 0).toDate(),
children: eventNotes,
},
]
```
## Theme
You can customize the calendar by passing the `theme` prop. `theme` should be like this interface partially:
```typescript
export interface Palette {
main: string
contrastText: string
}
export type Typography = Pick<
TextStyle,
'fontFamily' | 'fontWeight' | 'fontSize' | 'lineHeight' | 'letterSpacing' | 'textAlign'
>
export interface ThemeInterface {
palette: {
primary: Palette
nowIndicator: string
gray: {
100: string
200: string
300: string
500: string
800: string
}
moreLabel: string
}
isRTL: boolean
typography: {
fontFamily?: string
xs: Typography
sm: Typography
xl: Typography
moreLabel: Typography
}
eventCellOverlappings: readonly Palette[]
moreLabel: TextStyle
}
```
For example:
```typescript
const darkTheme = {
palette: {
primary: {
main: '#6185d0',
contrastText: '#000',
},
gray: {
'100': '#333',
'200': '#666',
'300': '#888',
'500': '#aaa',
'800': '#ccc',
},
},
}
```
## I18n
Please specity your locale via `locale` prop **and** import day.js locale file:
```typescript
import 'dayjs/locale/ja'
```
You can find your dayjs locale here:
https://github.com/iamkun/dayjs/tree/dev/src/locale
## Enriched Events Logic (Performance Boost)
### Performant Data Structure
We create and cache a dictionary keyed by date with all the events properties plus the overlapping counting:
```
{
[YYYY-MM-DD]: [
{
...all event information,
overlapPosition: int
overlapCount: int
}
]
}
```
### Multi-days events
When an event spans multiple days, we create a new event for each day it spans. For example, an event that starts on 2021-05-01 and ends on 2021-05-03 will be represented as 3 events, one for each day with the following time props:
```
--- First day
2021-05-01: {
...other data
start: event start datetime
end: current day midnight
}
-- All the intermediate days:
2021-05-02: {
...other data
start: previous day midnight
end: current day midnight
}
-- Final day
2021-05-03: {
...other data
start: previous day midnight
end: event start datetime
}
```
### Enriched Events Renderer
Optimised renderer get each event from the dictionary and render them without adding any extra logic like filtering or sorting.
### Preprocessed Data
You can build the dictionary by yourself and send it to the library through the prop `enrichedEventsByDate`.
This is specially useful for example when you want to build the dictionary in a background job.
# Running demo on a real device and develop
## Setup
After checking this repo, please run:
```sh
yarn install
yarn sync-rndemo
cd rndemo
yarn install
```
## Start
Start React Native development server in the demo directory:
```sh
cd rndemo
yarn start
```
Then, open another terminal and run:
```sh
# For ios
pod install
yarn ios
# For Android
yarn android
```
Every time you modify code of this library, you should run the following command in the root directory:
```sh
yarn sync-rndemo
```
# Screenshots
# Who's using this?
If you are using this library, please send a PR to add your organization!
# Contribution
- For stable version, please send PR to `v4` branch.
- For beta version, please send PR to `main` branch.
# Sponsors
# Enterprise support
First, thank you for your interest in this project. As this library is getting famous, lots of people are requesting features they need. I would like to respond all of them as possible, but there are limited hours I'm working on this. To be a full-time open sourcer and make this project sustainable, I've decided to add the enterprise support.
Enterprise customers are able to obtain:
- Full customization like colors, logos, images, and more.
- Priority response and development.
- Consultancy for React, TypeScript, and React Native application.
Note that some Enterprise features will be merged to the OSS version too.
If you are interested in those features, please send an email to: ketsume0211@gmail.com
# Hire me
I'm a freelance software engineer specialized in React, React Native and TypeScript. Also available for GraphQL and RDB backend, and Node.JS applications.
If you are interested in hiring me, please send an email to: ketsume0211@gmail.com
I'm based in Japan (by the beautiful sea), so a remote contract job is especially welcome.