在新的一年里，小编没有黄金万两，没有厚厚的红包，只有笑口常开，只有说不完的祝福，送给粉丝们。
每一声鞭炮响起，每一个烟花燃起，每一盏灯笼亮起，都流动着每一缕思念，每一份关怀，都凝聚着每一声问候，今年过节不收礼，随随便便过得去，包个红包就可以，多点少点不介意，或者来句评论话，知道把我记心里，我也为你送心意，愿粉丝们新年大吉，一切顺利!
今天小编给大家分享用几行代码怎么实现2023新年祝福。
全文大纲
Echa 新年祝福
无限放烟花
乖乖兔送祝福
兔年第一杯喝什么?
Echa 送祝福
大家猜猜这个是用啥实现的?先看效果图：
完整代码如下：
body {
margin: 0;
overflow: hidden;
background: black;
}
canvas {
position: absolute;
}
function GetRequest() {
var url = decodeURI(location.search); //获取url中"?"符后的字串
var theRequest = new Object();
if (url.indexOf("?") != -1) {
var str = url.substr(1);
strs = str.split("&");
for (var i = 0; i < strs.length; i++) {
theRequest[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);
}
}
return theRequest;
}
class Shard {
constructor(x, y, hue) {
this.x = x;
this.y = y;
this.hue = hue;
this.lightness = 50;
this.size = 15 + Math.random() * 10;
const angle = Math.random() * 2 * Math.PI;
const blastSpeed = 1 + Math.random() * 6;
this.xSpeed = Math.cos(angle) * blastSpeed;
this.ySpeed = Math.sin(angle) * blastSpeed;
this.target = getTarget();
this.ttl = 100;
this.timer = 0;
}
draw() {
ctx2.fillStyle = `hsl(${this.hue}, 100%, ${this.lightness}%)`;
ctx2.beginPath();
ctx2.arc(this.x, this.y, this.size, 0. 2 * Math.PI);
ctx2.closePath();
ctx2.fill();
}
update() {
if (this.target) {
const dx = this.target.x - this.x;
const dy = this.target.y - this.y;
const dist = Math.sqrt(dx * dx + dy * dy);
const a = Math.atan2(dy, dx);
const tx = Math.cos(a) * 5;
const ty = Math.sin(a) * 5;
this.size = lerp(this.size, 1.5. 0.05);
if (dist < 5) {
this.lightness = lerp(this.lightness, 100. 0.01);
this.xSpeed = this.ySpeed = 0;
this.x = lerp(this.x, this.target.x + fidelity / 2. 0.05);
this.y = lerp(this.y, this.target.y + fidelity / 2. 0.05);
this.timer += 1;
} else
if (dist < 10) {
this.lightness = lerp(this.lightness, 100. 0.01);
this.xSpeed = lerp(this.xSpeed, tx, 0.1);
this.ySpeed = lerp(this.ySpeed, ty, 0.1);
this.timer += 1;
} else {
this.xSpeed = lerp(this.xSpeed, tx, 0.02);
this.ySpeed = lerp(this.ySpeed, ty, 0.02);
}
} else {
this.ySpeed += 0.05;
//this.xSpeed = lerp(this.xSpeed, 0. 0.1);
this.size = lerp(this.size, 1. 0.05);
if (this.y > c2.height) {
shards.forEach((shard, idx) => {
if (shard === this) {
shards.splice(idx, 1);
}
});
}
}
this.x = this.x + this.xSpeed;
this.y = this.y + this.ySpeed;
}
}
class Rocket {
constructor() {
const quarterW = c2.width / 4;
this.x = quarterW + Math.random() * (c2.width - quarterW);
this.y = c2.height - 15;
this.angle = Math.random() * Math.PI / 4 - Math.PI / 6;
this.blastSpeed = 6 + Math.random() * 7;
this.shardCount = 15 + Math.floor(Math.random() * 15);
this.xSpeed = Math.sin(this.angle) * this.blastSpeed;
this.ySpeed = -Math.cos(this.angle) * this.blastSpeed;
this.hue = Math.floor(Math.random() * 360);
this.trail = [];
}
draw() {
ctx2.save();
ctx2.translate(this.x, this.y);
ctx2.rotate(Math.atan2(this.ySpeed, this.xSpeed) + Math.PI / 2);
ctx2.fillStyle = `hsl(${this.hue}, 100%, 50%)`;
ctx2.fillRect(0. 0. 5. 15);
ctx2.restore();
}
update() {
this.x = this.x + this.xSpeed;
this.y = this.y + this.ySpeed;
this.ySpeed += 0.1;
}
explode() {
for (let i = 0; i < 70; i++) {
shards.push(new Shard(this.x, this.y, this.hue));
}
}
}
console.log(GetRequest('val').val)
// INITIALIZATION
const [c1. c2. c3] = document.querySelectorAll('canvas');
const [ctx1. ctx2. ctx3] = [c1. c2. c3].map(c => c.getContext('2d'));
let fontSize = 200;
const rockets = [];
const shards = [];
const targets = [];
const fidelity = 3;
let counter = 0;
c2.width = c3.width = window.innerWidth;
c2.height = c3.height = window.innerHeight;
ctx1.fillStyle = '#000';
const text = 'Echa 祝大家 2023新年快乐!'
let textWidth = 99999999;
while (textWidth > window.innerWidth) {
ctx1.font = `900 ${fontSize--}px Arial`;
textWidth = ctx1.measureText(text).width;
}
c1.width = textWidth;
c1.height = fontSize * 1.5;
ctx1.font = `900 ${fontSize}px Arial`;
ctx1.fillText(text, 0. fontSize);
const imgData = ctx1.getImageData(0. 0. c1.width, c1.height);
for (let i = 0. max = imgData.data.length; i < max; i += 4) {
const alpha = imgData.data[i + 3];
const x = Math.floor(i / 4) % imgData.width;
const y = Math.floor(i / 4 / imgData.width);
if (alpha && x % fidelity === 0 && y % fidelity === 0) {
targets.push({ x, y });
}
}
ctx3.fillStyle = '#FFF';
ctx3.shadowColor = '#FFF';
ctx3.shadowBlur = 25;
// ANIMATION LOOP
(function loop() {
ctx2.fillStyle = "rgba(0. 0. 0. .1)";
ctx2.fillRect(0. 0. c2.width, c2.height);
//ctx2.clearRect(0. 0. c2.width, c2.height);
counter += 1;
if (counter % 15 === 0) {
rockets.push(new Rocket());
}
rockets.forEach((r, i) => {
r.draw();
r.update();
if (r.ySpeed > 0) {
r.explode();
rockets.splice(i, 1);
}
});