本文介绍了两种实现效果：一种使用画布（canvas）标签/元素，另一种不用画布（canvas）标签/元素主要使用CSS实现。
使用画布（canvas）标签/元素实现，下面，在画布上，用JavaScript画两个红灯笼，并且红灯笼左右来回移动的源码：
红灯笼
canvas {
border: 1px solid black;
background-color: blue; /*设置画布的背景色为蓝色*/
}
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var angle1 = 0;
var angle2 = 0; // 使第二个灯笼的初始角度与第一个灯笼不同
function drawLantern(x, y, radius, angle) {
x += Math.sin(angle) * 20;
// Draw the suspension line
context.beginPath();
context.moveTo(x, y - radius / 4);
context.lineTo(x, 0);
context.stroke();
// Draw the top
context.beginPath();
context.arc(x, y, radius / 4, 0, Math.PI * 2);
context.fillStyle = 'gold';
context.fill();
context.stroke();
// Draw the main body
context.beginPath();
context.arc(x, y, radius, 0, Math.PI * 2);
context.fillStyle = 'red';
context.fill();
context.stroke();
// Draw the bottom
context.beginPath();
context.arc(x, y + radius / 2, radius / 4, 0, Math.PI * 2);
context.fillStyle = 'gold';
context.fill();
context.stroke();
// Draw the tassel
context.beginPath();
context.moveTo(x, y + radius / 2);
context.lineTo(x, y + radius * 1.2);
context.moveTo(x - radius / 6, y + radius / 2);
context.lineTo(x - radius / 6, y + radius * 1.2);
context.moveTo(x + radius / 6, y + radius / 2);
context.lineTo(x + radius / 6, y + radius * 1.2);
context.stroke();
}
function animate() {
context.clearRect(0, 0, canvas.width, canvas.height);
context.fillStyle = 'blue';
context.fillRect(0, 0, canvas.width, canvas.height);
drawLantern(200, 200, 50, angle1);
drawLantern(300, 200, 50, angle2);
angle1 += 0.05;
angle2 += 0.05;
requestAnimationFrame(animate);
}
animate();
运行效果如下：
下面是另一种实现主要使用CSS实现，源码如下：
红灯笼效果
年
新
乐
快
.deng-box {
position: fixed;
top: -40px;
right: 150px;
z-index: 9999;
pointer-events: none;
}
.deng-box1 {
position: fixed;
top: -30px;
right: 10px;
z-index: 9999;
pointer-events: none
}
.deng-box2 {
position: fixed;
top: -40px;
left: 150px;
z-index: 9999;
pointer-events: none
}
.deng-box3 {
position: fixed;
top: -30px;
left: 10px;
z-index: 9999;
pointer-events: none
}
.deng-box1 .deng,
.deng-box3 .deng {
position: relative;
width: 120px;
height: 90px;
margin: 50px;
background: #d8000f;
background: rgba(216, 0, 15, .8);
border-radius: 50% 50%;
-webkit-transform-origin: 50% -100px;
-webkit-animation: swing 5s infinite ease-in-out;
box-shadow: -5px 5px 30px 4px #fc903d
}
.deng {
position: relative;
width: 120px;
height: 90px;
margin: 50px;
background: #d8000f;
background: rgba(216, 0, 15, .8);
border-radius: 50% 50%;
-webkit-transform-origin: 50% -100px;
-webkit-animation: swing 3s infinite ease-in-out;
box-shadow: -5px 5px 50px 4px #fa6c00
}
.deng-a {
width: 100px;
height: 90px;
background: #d8000f;
background: rgba(216, 0, 15, .1);
margin: 12px 8px 8px 8px;
border-radius: 50% 50%;
border: 2px solid #dc8f03
}
.deng-b {
width: 45px;
height: 90px;
background: #d8000f;
background: rgba(216, 0, 15, .1);
margin: -4px 8px 8px 26px;
border-radius: 50% 50%;
border: 2px solid #dc8f03
}
.xian {
position: absolute;
top: -20px;
left: 60px;
width: 2px;
height: 20px;
background: #dc8f03
}
.shui-a {
position: relative;
width: 5px;
height: 20px;
margin: -5px 0 0 59px;
-webkit-animation: swing 4s infinite ease-in-out;
-webkit-transform-origin: 50% -45px;
background: orange;
border-radius: 0 0 5px 5px
}
.shui-b {
position: absolute;
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left: -2px;
width: 10px;
height: 10px;
background: #dc8f03;
border-radius: 50%
}
.shui-c {
position: absolute;
top: 18px;
left: -2px;
width: 10px;
height: 35px;
background: orange;
border-radius: 0 0 0 5px
}
.deng:before {
position: absolute;
top: -7px;
left: 29px;
height: 12px;
width: 60px;
content: " ";
display: block;
z-index: 999;
border-radius: 5px 5px 0 0;
border: solid 1px #dc8f03;
background: orange;
background: linear-gradient(to right, #dc8f03, orange, #dc8f03, orange, #dc8f03)
}
.deng:after {
position: absolute;
bottom: -7px;
left: 10px;
height: 12px;
width: 60px;
content: " ";
display: block;
margin-left: 20px;
border-radius: 0 0 5px 5px;
border: solid 1px #dc8f03;
background: orange;
background: linear-gradient(to right, #dc8f03, orange, #dc8f03, orange, #dc8f03)
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.deng-t {
font-family: 黑体, Arial, Lucida Grande, Tahoma, sans-serif;
font-size: 3.2rem;
color: #dc8f03;
font-weight: 700;
line-height: 85px;
text-align: center
}
.night .deng-box,
.night .deng-box1,
.night .deng-t {
background: 0 0 !important
}
@-moz-keyframes swing {
0% {
-moz-transform: rotate(-10deg)
}
50% {
-moz-transform: rotate(10deg)
}
100% {
-moz-transform: rotate(-10deg)
}
}
@-webkit-keyframes swing {
0% {
-webkit-transform: rotate(-10deg)
}
50% {
-webkit-transform: rotate(10deg)
}
100% {
-webkit-transform: rotate(-10deg)
}
}
运行效果如下：
附录
为HTML网页添加喜庆气氛的诸多方法https://blog.csdn.net/cnds123/article/details/128865230
用CSS画了个灯笼https://juejin.cn/post/7051370971932033038
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