react-native-swipe-calendar v0.0.21

React Native Swipe Calendar

A swipeable calendar component for React Native. Fully native interactions powered by Reanimated 2 and React Native Gesture Handler.

Install

1. Follow installation instructions for reanimated and react-native-gesture-handler
2. npm install or yarn add react-native-swipe-calendar
3. import Calendar from 'react-native-swipe-calendar'

Props

type HeaderComponent = (props: { date: Date }) => JSX.Element | null;

type DayLabelComponentType = (props: { date: Date }) => JSX.Element | null;

type DayComponentType = (props: {
  date: Date;
  isInDisplayedMonth: boolean;
  isSelected: boolean;
  isToday: boolean;
}) => JSX.Element | null;

export type WeekComponentType = (props: {
  days: Date[];
}) => JSX.Element | null;

export type MonthComponentType = (props: {
  weeks: Date[][];
  firstDayOfMonth: Date;
}) => JSX.Element | null;

export type PageInterval = "day" | "week" | "month";

export type CalendarProps = {
  selectedDate?: Date | null; 
  onDateSelect?: OnDateSelect;
  onPageChange?: (date: Date) => void;
  currentDate?: Date;
  HeaderComponent?: HeaderComponentType;
  DayLabelComponent?: DayLabelComponentType;
  DayComponent?: DayComponentType;
  WeekComponent?: WeekComponentType;
  MonthComponent?: MonthComponentType;
  theme?: Partial<typeof DEFAULT_THEME>;
  pageBuffer?: number;
  minDate?: Date;
  maxDate?: Date;
  pageInterpolator?: CalendarPageInterpolator;
  simultaneousGestures?: (ComposedGesture | GestureType)[];
  monthAnimCallbackNode?: Animated.SharedValue<number>;
  gesturesDisabled?: boolean;
  animationConfig?: Partial<WithSpringConfig>;
  weekStartsOn?: WeekDayIndex;
  pageInterval?: PageInterval;
};

Imperative Api

Access the imperative api by passing a ref to the Calendar component:

type ImperativeApiOptions = {
  animated?: boolean;
}

type CalendarImperativeApi = {
  incrementPage: (options?: ImperativeApiOptions) => void;
  decrementPage: (options?: ImperativeApiOptions) => void;
  setPage: (date: Date, options?: ImperativeApiOptions) => void;
}

// Example
function MyComponent() {

  const calendarRef = useRef<CalendarImperativeApi>(null)
  const onIncrementButtonPress = () => calendarRef.current?.incrementPage()
  
  return (
    <>
     <Calendar ref={calendarRef} />
     <MyButton onPress={onIncrementButtonPress} />
    </>
  )
}

Hooks

If you render your own components via DayComponent prop or other custom view, you may need access to more internal state than is available on props. This state may be accessed via the exported useCalendarContext() hook.

NOTE: Be careful about performance! Lots of instances of DayComponent are rendered at any given time. You may need to wrap memoized inner wrappers around your custom components.

type CalendarContextValue = {
  referenceDate: Date,
  selectedDate: Date | null | undefined,
  onDateSelect: OnDateSelect,
  DayComponent:  DayComponentType | undefined,
  WeekComponent:  WeekComponentType | undefined,
  MonthComponent:  MonthComponentType | undefined,
  DayLabelComponent: DayLabelComponentType | undefined,
  HeaderComponent: HeaderComponentType | undefined,
  theme: typeof DEFAULT_THEME,
  pageInterpolator: typeof defaultPageInterpolator,
  weekStartsOn: number,
}

// Example
function MyCustomDayComponent({ date, isSelected }) {
  const { onDateSelect } = useCalendarContext()
  
  // Forward to the `onDateSelect` prop
  const onDayPress = () => onDateSelect(date, { isSelected })
  
  return (
  <TouchableOpacity onPress={onDayPress}>
    <Text>
      {date.getDate()}
    </Text>
  </TouchableOpacity>
  )
}

Custom pageInterpolator

The pageInterpolator prop enables customization of page animations using a Reanimated "worklet" function. For example, the following pageInterpolator will scale up upcoming months and fade in as they enter, then rotate and fade out as they leave:

// Example
function pageInterpolator({ focusAnim }: CalendarPageInterpolatorParams) {
  "worklet"
  
  const inputRange = [-1, 0, 1]
  
  // Ensure the current month has a higher zIndex than the surrounding months
  const zIndex = interpolate(focusAnim.value, inputRange, [0, 99, 0])
  
  // Fade the current month as it enters/leaves focus
  const opacity = interpolate(focusAnim.value, inputRange, [0, 1, 0])
  
  // Rotate the current month as it leaves focus
  const rotationDeg = interpolate(focusAnim.value, inputRange, [360, 0, 0])
  
  // Scale up the incoming month
  const scale = interpolate(focusAnim.value, inputRange, [2, 1, 0.25])
  
  return {
    opacity,
    zIndex,
    transform: [{ rotate: `${rotationDeg}deg` }, { scale }]
  }
}

Example

https://snack.expo.dev/@computerjazz/react-native-swipe-calendar

import React, {
  useState,
  useRef,
} from "react";
import {
  Text,
  View,
  StyleSheet,
  LayoutAnimation,
  TouchableOpacity,
  Platform,
  UIManager,
} from "react-native";
import Calendar from "react-native-swipe-calendar";

if (Platform.OS === "android") {
  UIManager.setLayoutAnimationEnabledExperimental &&
    UIManager.setLayoutAnimationEnabledExperimental(true);
}

export default function App() {

  const [currentDate, setCurrentDate] = useState(new Date());
  const [selectedDate, setSelectedDate] = useState<Date | null>(null);
  const calendarRef = useRef(null);
  
  return (
    <View style={styles.container}>
      <Calendar
        theme={{ todayIndicatorDotColor: "blue" }}
        ref={calendarRef}
        currentDate={currentDate}
        onDateSelect={(date, { isSelected }) => setSelectedDate(isSelected ? null : date )}
        selectedDate={selectedDate}
        onPageChange={(date) => {
          setCurrentDate(date);
          LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
        }}
      />
      <View style={styles.controlBar}>
        <TouchableOpacity
          style={styles.incDec}
          onPress={() => calendarRef.current?.decrementPage()}
        >
          <Text>{"<"}</Text>
        </TouchableOpacity>
        <TouchableOpacity
          style={styles.incDec}
          onPress={() => calendarRef.current?.incrementPage()}
        >
          <Text>{">"}</Text>
        </TouchableOpacity>
      </View>
    </View>
  );
}

const styles = StyleSheet.create({
  container: { 
    flex: 1, 
    backgroundColor: "white", 
    paddingTop: 100 
  },
  incDec: {
    paddingHorizontal: 20,
    padding: 10,
    backgroundColor: "lightgrey",
    alignItems: "center",
    justifyContent: "center",
    borderRadius: 5,
  },
  controlBar: {
    position: "absolute",
    top: 100,
    left: 0,
    right: 0,
    flexDirection: "row",
    justifyContent: "space-between",
  },
});