About the effect of HTML5 and CSS3 clock implementation
Use HTML5 and CSS to achieve the pendulum effect, which is often encountered in projects. Today, I will share the implementation code of a simple clock effect based on HTML5 CSS3 to the Script Home platform. Friends who need it can refer to it
Purpose:
Use html5 and css to achieve the pendulum effect
Knowledge points:
1) Use position/left/top and calc() to achieve horizontal and vertical centering of elements;
2) Use CSS3 animation/transform/transform-origin properties to define animations;
3) Use transform-origin to adjust the center of the rotation origin
Without further ado, let’s look at the code directly. The specific code is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
li{
list-style:none;
}
#box{
width: 400px;
height: 400px;
position: absolute;
top:calc(50% - 200px);
left:calc(50% - 200px);
border: 2px solid palegoldenrod;
}
#dial{
width: 200px;
height: 200px;
position: absolute;
top:calc(50% - 100px);
left:calc(50% - 100px);
border: 2px solid cyan;
border-radius: 50%;
}
.scaleIndex{
width: 4px;
height: 12px;
position: absolute;
top: 0;
left: calc(50% - 2px);
background-color: gray;
transform-origin: 2px 100px;
}
.angle30{transform : rotate(30deg);}
.angle60{transform : rotate(60deg);}
.angle90{transform : rotate(90deg);}
.angle120{transform : rotate(120deg);}
.angle150{transform : rotate(150deg);}
.angle180{transform : rotate(180deg);}
.angle210{transform : rotate(210deg);}
.angle240{transform : rotate(240deg);}
.angle270{transform : rotate(270deg);}
.angle300{transform : rotate(300deg);}
.angle330{transform : rotate(330deg);}
#fixPoint{
width: 10px;
height: 10px;
position: absolute;
top:calc(50% - 5px);
left:calc(50% - 5px);
background-color: cadetblue;
border-radius: 50%;
}
#hourHand{
width: 6px;
height: 70px;
position:absolute;
top: 40px;
left: calc(50% - 3px);
background-color: darkblue;
transform-origin: 50% 60px;
}
#minuteHand{
width: 4px;
height: 75px;
position:absolute;
top: 35px;
left: calc(50% - 2px);
background-color: yellow;
transform-origin: 50% 65px;
}
#secondHand{
width: 2px;
height: 90px;
position:absolute;
top: 20px;
left: calc(50% - 1px);
background-color: red;
transform-origin: 50% 80px;
}
</style>
</head>
<body>
<p id = "box">
<p id = 'dial'>
<ul id = "scale">
<li class = "scaleIndex"></li>
<li class = "scaleIndex angle30"></li>
<li class = "scaleIndex angle60"></li>
<li class = "scaleIndex angle90"></li>
<li class = "scaleIndex angle120"></li>
<li class = "scaleIndex angle150"></li>
<li class = "scaleIndex angle180"></li>
<li class = "scaleIndex angle210"></li>
<li class = "scaleIndex angle240"></li>
<li class = "scaleIndex angle270"></li>
<li class = "scaleIndex angle300"></li>
<li class = "scaleIndex angle330"></li>
</ul>
<p id = "fixPoint"></p>
<p id = "hourHand"></p>
<p id = "minuteHand"></p>
<p id = "secondHand"></p>
</p>
</p>
<script type = 'text/javascript' src = 'js/jquery-3.2.1.js'></script>
<script type = "text/javascript">
window.onload = function(){
var hourHand = document.getElementById('hourHand');
var minuteHand = document.getElementById('minuteHand');
var secondHand = document.getElementById('secondHand');
setInterval(function(){
var currentTime = new Date();
var hourValue = currentTime.getHours();
var hourAngle = hourValue / 24 * 360 + 'deg';
var minuteValue = currentTime.getMinutes();
var minuteAngle = minuteValue / 60 * 360 + 'deg';
var secondValue = currentTime.getSeconds();
var secondAngle = secondValue / 60 * 360 + 'deg';
console.log(hourAngle);
// 方法一：利用jquery的css()增加属性
var cmdHour = 'rotate('+ hourAngle +')';
$('#hourHand').css({transform:'rotate('+ hourAngle +')'});
var cmdMinute = 'rotate('+ minuteAngle +')';
$('#minuteHand').css({transform:cmdMinute});
var cmdSecond = 'rotate('+ secondAngle +')';
$('#secondHand').css({transform:cmdSecond});
// 方法二：利用DOM元素的style属性设置
// hourHand.style.transform = 'rotate('+ hourAngle + ')';
// minuteHand.style.transform = 'rotate('+ minuteAngle + ')';
// secondHand.style.transform = 'rotate('+ secondAngle + ')';
},1000);
}
</script>
</body>
</html>The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!
Related recommendations:
html5 and css3 and jquery to implement a music player
Use JavaScript and canvas to implement image cropping
The above is the detailed content of About the effect of HTML5 and CSS3 clock implementation. For more information, please follow other related articles on the PHP Chinese website!
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