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    react-native-countdown-circle-timer
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    3.0.9 • Public • Published

    React Native Countdown Circle Timer

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    React Native countdown timer component in a circle shape with color and progress animation.

    Features

    Performance optimized with single requestAnimationFrame loop to animate color and progress
    🌈 Transition between colors during the countdown
    🏰 Fully customizable content in the center of the circle
    🚀 Support iOS and Android

    Install

    yarn add react-native-countdown-circle-timer
    

    This component has a peer dependency on react-native-svg to draw the countdown circle. react-native-svg has to be installed and linked into your project.

    Usage

    Component

    Check the Expo Snack demo to get started.

    import { Text } from 'react-native'
    import { CountdownCircleTimer } from 'react-native-countdown-circle-timer'
    
    const UrgeWithPleasureComponent = () => (
      <CountdownCircleTimer
        isPlaying
        duration={7}
        colors={['#004777', '#F7B801', '#A30000', '#A30000']}
        colorsTime={[7, 5, 2, 0]}
      >
        {({ remainingTime }) => <Text>{remainingTime}</Text>}
      </CountdownCircleTimer>
    )

    Hook

    The package exports a hook useCountdown, which accepts the same props as the component and returns all props needed to render your own circle.

    import { useCountdown } from 'react-native-countdown-circle-timer'
    
    const {
      path,
      pathLength,
      stroke,
      strokeDashoffset,
      remainingTime,
      elapsedTime,
      size,
      strokeWidth,
    } = useCountdown({ isPlaying: true, duration: 7, colors: '#abc' })

    Props

    Prop Name Type Default Description
    duration number required Countdown duration in seconds
    colors string | string[] required colors prop is either:
    - Single valid color in any format or URL to a gradient
    - Array of colors in HEX format. At least 2 colors should be provided
    colorsTime number[] - Indicates the time when a color should switch to the next color. The first number is the countdown duration and the last one is 0 or goal. Works only when colors is an array of HEX colors
    isPlaying boolean false Play or pause animation
    initialRemainingTime number - Set the initial remaining time if it is different than the duration
    updateInterval number 0 Update interval in seconds. Determines how often the timer updates. When set to 0 the value will update on each key frame
    size number 180 Width and height of the SVG element
    strokeWidth number 12 Path stroke width
    trailStrokeWidth number strokeWidth Trail stroke width
    strokeLinecap round | square | butt round Path stroke line cap
    rotation clockwise | counterclockwise clockwise Progress path rotation direction
    trailColor string #d9d9d9 Circle trail color - takes any valid color format
    isSmoothColorTransition boolean true Indicates if the colors should smoothly transition to the next color
    children (props: { remainingTime: number, elapsedTime: number, color: string }) => ReactNode - Render function to customize the time/content in the center of the circle
    onComplete (totalElapsedTime: number) => void | { shouldRepeat: boolean, delay?: number, newInitialRemainingTime?: number } - On animation complete event handler
    onUpdate (remainingTime: number) => void - On remaining time update event handler

    Recipes

    Changing duration prop

    Once the component is mounted the duration prop can be changed the the timer will respect the new duration. In case the new duration is bigger than the previous one then the timer will continue to the new duration. In case the new duration is smaller then the previous one then the timer will ne over. If you want to restart the timer when the duration changes then pass a new key prop to CountdownCircleTimer component and the timer will start over with the new values provided.

    Restart timer at any given time

    Pass a key prop to CountdownCircleTimer and change the key when the timer should be restarted. Check this demo to find out one possible implementation.

    Repeat timer when countdown is completed

    Return an object from onComplete handler, which indicates if the animation should be repeated. Example:

    const UrgeWithPleasureComponent = () => (
      <CountdownCircleTimer
        isPlaying
        duration={10}
        colors="#A30000"
        onComplete={() => {
          // do your stuff here
          return { shouldRepeat: true, delay: 1.5 } // repeat animation in 1.5 seconds
        }}
      />
    )

    Set the initial remaining time different then the duration provided

    Pass the remaining time to initialRemainingTime prop. Example:

    const UrgeWithPleasureComponent = () => (
      <CountdownCircleTimer
        isPlaying
        duration={60}
        initialRemainingTime={15}
        colors="#A30000"
      />
    )

    In the example above, the countdown will start at 15 seconds (one quarter before it's done) and it will animate for 15 seconds until reaches 0.

    Time formatting functions

    children prop of CountdownCircleTimer component will receive as a prop remainingTime in seconds. Below are a few functions that can be used to get different time formatting:

    • Format mm:ss (minutes and seconds)
    const children = ({ remainingTime }) => {
      const minutes = Math.floor(remainingTime / 60)
      const seconds = remainingTime % 60
    
      return `${minutes}:${seconds}`
    }
    • Format hh:mm:ss (hours, minutes and seconds)
    const children = ({ remainingTime }) => {
      const hours = Math.floor(remainingTime / 3600)
      const minutes = Math.floor((remainingTime % 3600) / 60)
      const seconds = remainingTime % 60
    
      return `${hours}:${minutes}:${seconds}`
    }

    Add a11y support

    • Wrapper the timer in an View element and add the following attributes accessible={true} accessibilityLabel={your-aria-abel}
    • Add the following Text element to your children function that will make the screen reader read the remaining time while the timer is running.
    const children = ({ remainingTime }) => (
      <Text
        accessibilityRole="timer"
        accessibilityLiveRegion="assertive"
        importantForAccessibility="yes"
      >
        {remainingTime} seconds
      </Text>
    )

    Add gradient

    Since the gradient definition and the usage of it has to be placed under the same SVG element we should use the useCountdown hook and build the countdown component ourself. Check this demo to see how it works.

    const {
        ...
      } = useCountdown({ isPlaying: true, duration, colors: 'url(#your-unique-id)' })
    
      <Svg width={size} height={size}>
        <Defs>
          <LinearGradient id="your-unique-id" x1="1" y1="0" x2="0" y2="0">
            <Stop offset="5%" stopColor="gold"/>
            <Stop offset="95%" stopColor="red"/>
          </LinearGradient>
        </Defs>
        <Path
          d={path}
          fill="none"
          stroke="#d9d9d9"
          strokeWidth={strokeWidth}
        />
        <Path
          d={path}
          fill="none"
          stroke={stroke}
          strokeLinecap="butt"
          strokeWidth={strokeWidth}
          strokeDasharray={pathLength}
          strokeDashoffset={strokeDashoffset}
        />
      </Svg>

    Install

    npm i react-native-countdown-circle-timer

    DownloadsWeekly Downloads

    5,220

    Version

    3.0.9

    License

    MIT

    Unpacked Size

    22.3 kB

    Total Files

    4

    Last publish

    Collaborators

    • vydimitrov