js to realize a simple disc clock

js to realize a simple disc clock

This article shares the specific code of js to implement a simple disc clock for your reference. The specific content is as follows

Preview image:

Code:

CSS:

<style>
        .disc {
            position: relative;
            margin: 200px auto;
            width: 300px;
            height: 300px;
            border: 1px solid #000;
            border-radius: 50%;
        }
        
        .axis {
            position: absolute;
            top: 150px;
            left: 150px;
            transform: translate(-50%, -50%);
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: #000;
        }
        
        .hourHand {
            position: absolute;
            top: 150px;
            left: 147px;
            width: 6px;
            height: 80px;
            background-color: #000;
            transform-origin: 3px 0;
        }
        
        .minuteHand {
            position: absolute;
            top: 150px;
            left: 148px;
            width: 4px;
            height: 110px;
            background-color: #000;
            transform-origin: 2px 0;
        }
        
        .secondHand {
            position: absolute;
            top: 150px;
            left: 149px;
            width: 2px;
            height: 130px;
            background-color: #000;
            transform-origin: 1px 0;
        }
        
        .scale {
            position: absolute;
            top: 0;
            left: 150px;
            transform-origin: 2.5px 150px;
            width: 2px;
            height: 5px;
            background-color: #000;
        }
        
        .num {
            position: absolute;
            top: 15px;
            left: 150px;
            width: 20px;
            height: 20px;
            color: 16px;
            text-align: center;
            line-height: 20px;
            transform-origin: 50% 135px;
        }
        
        .num span {
            display: block;
            transform-origin: 50% 50%;
        }
</style>

html:

<div class="disc">
        <div class="axis"></div>
        <div class="hourHand"></div>
        <div class="minuteHand"></div>
        <div class="secondHand"></div>

</div>

js:

// Get the element var disc = document.getElementsByClassName('disc')[0];
        var hourHand = document.getElementsByClassName('hourHand')[0];
        var minuteHand = document.getElementsByClassName('minuteHand')[0];
        var secondHand = document.getElementsByClassName('secondHand')[0];
        var scale = document.getElementsByClassName('scale');

        // Generate scale for (var i = 0; i < 60; i++) {
            var scale = document.createElement('div');
            scale.classList.add('scale');
            scale.style.transform = `translate(-50%) rotate(${i*6}deg)`;
            disc.appendChild(scale);
            scale.style.transform = `translate(-50%) rotate(${i*6}deg)`;
            if (i % 5 === 0) {
                scale.style.width = 4 + 'px';
                scale.style.height = 12 + 'px';
            }
        }

        // Generate numbers for (var i = 0; i < 12; i++) {
            var num = document.createElement('div');
            var numx = document.createElement('span');
            num.classList.add('num');
            num.style.transform = `translate(-50%)rotate(${i*30+30}deg)`;
            numx.style.transform = `rotate(${-i*30-30}deg)`;
            numx.innerHTML = i + 1;
            disc.appendChild(num);
            num.appendChild(numx);
        }


        // Display as soon as the browser is opened, without pausing var h = getTime().hours;
        h = h > 12 ? h - 12 : h;
        hourHand.style.transform = `rotate(${h*30-180+(getTime().minute*0.5)}deg)`;
        minuteHand.style.transform = `rotate(${getTime().minute*6-180}deg)`;
        secondHand.style.transform = `rotate(${getTime().second*6-180}deg)`;

        // Timer, execute once every second setInterval(function() {
            var h = getTime().hours;
            h = h > 12 ? h - 12 : h;
            hourHand.style.transform = `rotate(${h*30-180+(getTime().minute*0.5)}deg)`;
            minuteHand.style.transform = `rotate(${getTime().minute*6-180}deg)`;
            secondHand.style.transform = `rotate(${getTime().second*6-180}deg)`;
        }, 1000)


        // Function: Get time function getTime() {
            var date = new Date();
            var year = date.getFullYear();
            var month = date.getMonth();
            month = month < 10 ? '0' + month : month;
            var day = date.getDate();
            day = day < 10 ? '0' + day : day;
            var week = date.getDay();
            var weeks = ['Sun', 'Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat'];
            var weekZn = weeks[week];
            var hou = date.getHours();
            hou = hou < 10 ? '0' + hou : hou;
            var min = date.getMinutes();
            min = min < 10 ? '0' + min : min;
            var sec = date.getSeconds();
            sec = sec < 10 ? '0' + sec : sec;
            return {
                year: year,
                month: month,
                day: day,
                week: weekZn,
                hours: hou,
                minute: min,
                second: sec
            }
        }

For more JavaScript clock effects, click here: JavaScript clock effects special topic

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

You may also be interested in:
  • JS implements a method to prohibit high-frequency continuous clicks [based on ES6 syntax]
  • How to prevent high-frequency triggering and high-frequency calling of event functions in JavaScript
  • Do you know all 24 methods of JavaScript loop traversal?
  • Detailed explanation of JavaScript array deduplication
  • js to achieve a simple carousel effect
  • JavaScript to implement the aircraft war game
  • Even a novice can understand the difference between typeof and instanceof in js
  • A complete list of frequently asked JavaScript questions for front-end interviews

<<:  Implementing file content deduplication and intersection and difference in Linux

>>:  Detailed explanation of the use of MySQL DML statements

Recommend

Three common uses of openlayers6 map overlay (popup window marker text)

Table of contents 1. Write in front 2. Overlay to...

How to implement the webpage anti-copying function (with cracking method)

By right-clicking the source file, the following c...

Example code for implementing hollowing effect with CSS

Effect principle Mainly use CSS gradient to achie...

MySQL Learning: Three Paradigms for Beginners

Table of contents 1. Paradigm foundation 1.1 The ...

Detailed explanation of the solution to permission denied in Linux

Permission denied: The reason for this is: there ...

Detailed description of the use of advanced configuration of Firewalld in Linux

IP masquerading and port forwarding Firewalld sup...

Code for aligning form checkbox and radio text

Alignment issues like type="radio" and t...

js to achieve interesting countdown effect

js interesting countdown case, for your reference...

Detailed explanation of nginx-naxsi whitelist rules

Whitelist rule syntax: BasicRule wl:ID [negative]...

Getting the creation time of a file under Linux and a practical tutorial

background Sometimes we need to get the creation ...