<
div
class
=
"temp month"
>
</
div
>
<
div
class
=
"temp day"
>
</
div
>
<
div
class
=
"temp hour"
>
</
div
>
<
div
class
=
"temp minute"
>
</
div
>
<
div
class
=
"temp second"
>
</
div
>
</
div
>
js生成数字
这个函数是我用来生成日期，时间数字的,传入了5个参数确实有点多了
第一个参数
num
:传入循环的终点
第二个参数
date
:传入要生成的标签加在哪里，也就是是谁下的标签
第三个参数
target
:传入单位，时分秒这些
第四个参数
bool
:传入是否，用来指定是否要补零
第五个参数
origin
:传入它的起始点
由于使用 dom 操作会消耗性能，这里需要大量的添加 dom 节点，如果使用简单的for循环生成节点，会多次的修改 dom 结构
为了提高性能，可以建立一个文档碎片
documentfragment
，作为临时容器，最后一次再加到父节点中
function create(num,date,target,bool,origin) {
var fragment = document.createDocumentFragment();
for(var i = origin; i < num ; i ++) {
var j = i;
if(bool){
j = j > 9 ? j : '0' + j;
var span = document.createElement('span');
span.appendChild(document.createTextNode(j + target));
fragment.appendChild(span);
date.appendChild(fragment);
展示表盘，也就是生成圆形的效果
通过定位将全部span盒子定位在一起，通过transfromX将盒子一开，作为半径，再通过给每个盒子旋转一份角度，使得盒子均匀的散开
function rot(target,distance) {
var rotBox = target.children;
for(var i = 0 ;i < rotBox.length ; i ++ ){
rotBox[i].style.transform = 'rotate(' + (360 / rotBox.length ) * i + 'deg)' + 'translateX(' + distance + ')' ;
由于页面加载需要一定时间，会导致js代码未能立即执行，页面会有一段空白阶段,所以添加一个立即执行函数让页面一加载就有效果呈现
<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
margin: 0;
padding: 0;
body {
background-color: rgb(8, 8, 8);
color: rgb(92, 91, 91);
font-size: 18px;
.clock {
position: absolute;
left:50%;
top:50%;
width: 1000px;
height: 1000px;
transform: translate(-50%,-50%);
.temp {
position: absolute;
top: 0;
width: 1000px;
height: 1000px;
transition: all .5s;
.temp span{
position: absolute;
left: 50%;
top: 50%;
width: 40px;
height: 20px;
margin-top: -10px;
margin-left: -20px;
span {
display: block;
.now {
color: white;
text-shadow: 0 0 10px white;
.year span {
font-size: 24px;
width: 90px;
margin-left: -35px;
margin-top: -15px;
</style>
</head>
<div class="clock">
<div class=" temp year">
<span></span>
</div>
<div class="temp month"></div>
<div class="temp day"></div>
<div class="temp hour"></div>
<div class="temp minute"></div>
<div class="temp second"></div>
</div>
<script>
var year = document.querySelector('.year');
var month = document.querySelector('.month');
var day = document.querySelector('.day');
var hour = document.querySelector('.hour');
var minute = document.querySelector('.minute');
var second = document.querySelector('.second');
var yearSpan = year.querySelector('span');
create(13,month,'月',false,1);
create(31,day,'日',false,1);
create(24,hour,'时',true,0);
create(60,minute,'分',true,0);
create(60,second,'秒',true,0);
(timer())
setInterval(timer,1000);
rot(second,'400px');
rot(minute,'320px');
rot(hour,'240px');
rot(day,'160px');
rot(month,'100px');
function rot(target,distance) {
var rotBox = target.children;
for(var i = 0 ;i < rotBox.length ; i ++ ){
rotBox[i].style.transform = 'rotate(' + (360 / rotBox.length ) * i + 'deg)' + 'translateX(' + distance + ')' ;
function create(num,date,target,bool,origin) {
var fragment = document.createDocumentFragment();
for(var i = origin; i < num ; i ++) {
var j = i;
if(bool){
j = j > 9 ? j : '0' + j;
var span = document.createElement('span');
span.appendChild(document.createTextNode(j + target));
fragment.appendChild(span);
date.appendChild(fragment);
function timer() {
var time = new Date();
var nowYear = time.getFullYear();
var nowMonth = time.getMonth() + 1;
var nowDay = time.getDate();
var nowHour = time.getHours();
var nowMinute = time.getMinutes();
var nowSecond = time.getSeconds();
yearSpan.innerHTML = nowYear + '年';
yearSpan.className = 'now';
var rotateH = nowHour * 15 ;
var rotateM = nowMinute * 6;
var rotateS = nowSecond * 6;
var rotateD = (nowDay - 1) * 12;
var rotateMo = (nowMonth - 1 ) * 30;
second.style.transform = 'rotate(' + (- rotateS) + 'deg' + ')';
minute.style.transform = 'rotate(' + (- rotateM) + 'deg' + ')';
hour.style.transform = 'rotate(' + (- rotateH) + 'deg' + ')';
day.style.transform = 'rotate(' + (- rotateD) + 'deg' + ')';
month.style.transform = 'rotate(' + (- rotateMo) + 'deg' + ')';
clearClass(month)
clearClass(day);
clearClass(hour);
clearClass(minute);
clearClass(second);
month.children[nowMonth - 1].className = 'now';
day.children[nowDay - 1].className = 'now';
hour.children[nowHour].className = 'now';
minute.children[nowMinute].className = 'now';
second.children[nowSecond].className = 'now';
function clearClass(target) {
for(var i = 0;i < target.children.length; i++ ) {
target.children[i].className = '';
</script>
</body>
