react-native-countdown-circle-timer
v3.2.1
Published
Lightweight React Native countdown timer component with color and progress animation based on SVG
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React Native Countdown Circle Timer
React Native countdown timer component in a circle shape with color and progress animation.
Features
:zap: Performance optimized with single requestAnimationFrame
loop to animate color and progress
:rainbow: Transition between colors during the countdown
:european_castle: Fully customizable content in the center of the circle
:rocket: 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 |
| isGrowing | boolean | false | Indicated if the progress path should be growing instead of shrinking |
| 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 attributesaccessible={true} accessibilityLabel={your-aria-abel}
- Add the following
Text
element to yourchildren
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>