Ticktock.web.js

Features

I created a module that makes it easy to make a clock. Introduction I aimed to make analog clocks easy on the Web.

Installation

npm install ticktock.web.js

Usage

First, prepare the HTML of the analog clock. Sample HTML is available, so if you want to use the sample, please check "src/index.html". An analog clock is a 360-degree round clock that has an hour hand, a minute hand, and a second hand.

Add the following JS to this HTML

import {ticktock} from "./ticktock";

window.addEventListener('load', (event) => {
    const hourHand = document.getElementById('hour')
    const minuteHand = document.getElementById('minute')
    const secondHand = document.getElementById('second')

    if (!hourHand || !minuteHand || !secondHand) {
        throw new Error('not find element')
    }

    window.addEventListener('ticktock-1000', ((e: CustomEvent ) => {
        const { angle } = e.detail

        const degHour = `${angle.hour}deg`
        const degMinute = `${angle.min}deg`
        const degSecond = `${angle.sec}deg`

        hourHand.style.transform = `translate(-50%, -100%) rotate(${degHour})`
        minuteHand.style.transform = `translate(-50%, -100%) rotate(${degMinute})`
        secondHand.style.transform = `translate(-50%, -100%) rotate(${degSecond})`
    }) as EventListener)

    ticktock().start()
})

After importing this module, if you execute start for ticktock, a custom event called "ticktock-1000" will be fired every second. The "ticktock-1000" event contains the angles that the hour, minute, and second hands point to from the center of the clock, so give that value to each CSS.

Special features

The timing of the custom event is set so that it does not deviate from the device's built-in clock by 100 ms or more.

Method

Currently, the only methods available are "start" and "stop".

• Running start will cause the custom event to fire
• Executing stop will stop the custom event

Roadmap

I am thinking of the following updates in the future

• Updates for digital clocks
• Update for timer
• Schedule function