An SVG-based visual countdown timer in React

React SVG Timer

A React component to provide an SVG-based timer button with visual feedback of elapsed time.

Installation

npm install react-svg-timer

Build

This module has been bootstrapped with tsdx. Check the documentation there on how to build and run the module.

Usage

The component can take additional, optional props:

• countdownColor: string: the color of the countdown ring. Type can be hex, rgb, rgba - whatever an SVG can use.
• innerColor: string: the color of the inner circle ring.
• outerColor: string: the color of the outer ring.
• resetTimerRequested: bool: Whether the user has requested the timer be reset.
• resetTimer: func: A callback function to further handle the timer reset event.
• completeTimer: bool: Indicates whether the timer has reached the desired time.
• timerDuration: int: The elapsed duration in milliseconds.
• displayCountdown: bool: Shows/hides the numerical countdown.

A more complete implementation could therefore be:

let [resetRequested, setResetRequested] = useState(false)
let [timerIsComplete, setTimerIsComplete] = useState(false)
let [logMilliseconds, setLogMilliseconds] = useState(true)

onComplete = (status) => {
  setTimerIsComplete(status);
}

onReset = () => {
  setResetRequested(false);
}

timerValue = (value) => {
  if (logMilliseconds) {
    console.log(value);
  }
}

onResetRequest = () => {
  setResetRequested(true);
}

render () {
  return (

    <ReactSvgTimer
      timerCount={6}
      countdownColor="#00ffa8"
      innerColor="#fff"
      outerColor="#000"
      resetTimer={onReset}
      completeTimer={onComplete}
      resetTimerRequested={resetRequested}
      timerDuration={timerValue}
      displayCountdown={displayCountdown}
    />

  );
}

The optional props are designed to provide flexibility for implementation. You can use the timer as a discrete component, and just listen for the timerComplete callback. Alternatively, for example, you could choose to hide the numerical display countdown with displayCountdown={false}, and use the timerDuration callback to provide your own numerical countdown.

GitHub