javascript-analog-clock/script.js at main · jubayerr/javascript-analog-clock · GitHub

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setInterval(setClock, 1000)

const hourHand = document.querySelector('[data-hour-hand]')
const minuteHand = document.querySelector('[data-minute-hand]')
const secondHand = document.querySelector('[data-second-hand]')

function setClock() {
    const currentDate = new Date()
    const secondsRation = currentDate.getSeconds() / 60
    const minutesRation = (secondsRation + currentDate.getMinutes()) / 60
    const hoursRation = (minutesRation + currentDate.getHours()) / 12
    setRotation(secondHand, secondsRation)
    setRotation(minuteHand, minutesRation)
    setRotation(hourHand, hoursRation)
}

function setRotation(element, rotationRatio) {
    element.style.setProperty('--rotation', rotationRatio * 360)
}

setClock()