“This is the fourth day of my participation in the First Challenge 2022. For details: First Challenge 2022”
Near the end of the semester, are you still writing an HTML web design class assignment and the teacher’s homework requirements are overwhelming? Is the total number of pages required too high? Don’t know how to do your HTML web homework? Don’t have the right template? And so on. The problem you’re trying to solve, There are personal, food, company, sports, cosmetics, logistics, environmental protection, books, wedding, military, games, festivals, smoking cessation, film, photography school, tourism, e-commerce, pets, electrical appliances, tea, home, hotel, dance, animation, stars, Clothing, culture, hometown, flowers, gifts, cars, other web design topics, A+ level homework, can meet college students web design needs can meet your needs. Original HTML+CSS+JS page design, Web college students web design homework source code, this is a good 2022 New Year greeting card special effects web design production, picture smart, very suitable for beginners to learn to use.
GIF demo:
A super cool New Year 2022 happy HTML page special effects, neon city night scene and gorgeous fireworks are very special, the HTML page has interactive effects, click the mouse will present fireworks bloom special effects, only beautiful. Pictures can be changed to their favorite night scene or people can. * * * *
Main code:
Image selection introduction:
html, body {
margin: 0;
padding: 0;
overflow: hidden;
background: #000;
font-family: Montserrat, sans-serif;
background-image: url(img/pexels-photo-219692.jpeg);
background-size: cover;
background-position: center;
}
Copy the code
html.body {
margin: 0;
padding: 0;
overflow: hidden;
background: # 000;
font-family: Montserrat, sans-serif;
background-image: url(img/pexels-photo-219692.jpeg);
background-size: cover;
background-position: center;
}
canvas {
mix-blend-mode: lighten;
cursor: pointer;
}
#hero {
display: inline;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
mix-blend-mode: color-dodge;
}
#year {
font-size: 30vw;
color: #d0d0d0;
font-weight: bold;
}
#timeleft {
color: #fbfbfb;
font-size: 2.5 vw;
text-align: center;
font-family: Lora, serif;
}
Copy the codeJavascirpt code implementation:
const canvas = document.createElement('canvas'),
context = canvas.getContext('2d'),
width = canvas.width = window.innerWidth,
height = canvas.height = window.innerHeight,
HalfPI = Math.PI / 2,
gravity = vector.create(0.0.35),
year = document.getElementById('year'),
timeleft = document.getElementById('timeleft'),
newyear = new Date('01/01/2020');
let objects = [],
startFireworks = false,
newYearAlready = false;
function renderTimeLeft() {
let date = new Date(a);let delta = Math.abs(newyear - date) / 1000;
let hours = Math.floor(delta / 3600) % 24;
delta -= hours * 3600;
let minutes = Math.floor(delta / 60) % 60;
delta -= minutes * 60;
let seconds = Math.floor(delta % 60) + 1;
let string = ' ';
let DaysLeft = Math.floor((newyear - date) / (1000 * 60 * 60 * 24)),
HoursLeft = `${hours} ${hours > 1 ? 'hours' : 'hour'}`,
MinutesLeft = `${minutes} ${minutes > 1 ? 'minutes' : 'minute'}`,
SecondsLeft = `${seconds} ${seconds > 1 ? 'seconds' : 'second'}`;
if (hours > 0) string = `${HoursLeft} & ${MinutesLeft}`;else
if (minutes > 0) string = `${MinutesLeft} & ${SecondsLeft}`;else
string = `${SecondsLeft}`;
if (DaysLeft > 0) string = DaysLeft + ' days, ' + string;
string += ' until 2020';
timeleft.innerHTML = string;
}
renderTimeLeft();
setInterval(function () {
let date = new Date(a);if (date >= newyear) {
if(! newYearAlready) { year.innerHTML ='2022';
startFireworks = true;
timeleft.innerHTML = 'Happy New Year! ';
}
newYearAlready = true;
} else renderTimeLeft();
}, 500);
document.body.appendChild(canvas);
function random255() {
return Math.floor(Math.random() * 100 + 155);
}
function randomColor() {
let r = random255(),
g = random255(),
b = random255();
return `rgb(${r}.${g}.${b}) `;
}
class PhysicsBody {
constructor() {
objects.push(this);
}
PhysicsUpdate() {
this.lastPosition = this.position.duplicate();
this.position.addTo(this.velocity);
this.velocity.addTo(gravity);
}
deleteObject() {
objects[objects.indexOf(this)] = undefined;
}}
class firework extends PhysicsBody {
constructor() {
super(a);this.position = vector.create(Math.random() * width, height);
let Velocity = vector.create(0.0);
Velocity.setLength(Math.random() * 10 + 15);
Velocity.setAngle(Math.PI * 1.35 + Math.random() * Math.PI * 0.30);
this.velocity = Velocity;
this.trail = Math.floor(Math.random() * 4) != 1;
this.trailColor = this.trail ? randomColor() : undefined;
this.trailWidth = 2;
this.TimeCreated = new Date().getTime();
this.TimeExpired = this.TimeCreated + (Math.random() * 5 + 7) * 100;
this.BlastParticleCount = Math.floor(Math.random() * 50) + 25;
this.funky = Math.floor(Math.random() * 5) = =1;
this.exposionColor = randomColor();
}
draw() {
context.strokeStyle = this.trailColor;
context.lineWidth = this.trailWidth;
let p = this.position,
lp = this.lastPosition;
context.beginPath();
context.moveTo(lp.getX(), lp.getY());
context.lineTo(p.getX(), p.getY());
context.stroke();
}
funkyfire() {
var funky = this.funky;
for (var i = 0; i < Math.floor(Math.random() * 10); i++) {
new BlastParticle({ firework: this, funky }); }}explode() {
var funky = this.funky;
for (var i = 0; i < this.BlastParticleCount; i++) {
new BlastParticle({ firework: this, funky });
}
this.deleteObject();
}
checkExpire() {
let now = new Date().getTime();
if (now >= this.TimeExpired) this.explode();
}
render() {
if (this.trail) this.draw();
if (this.funky) this.funkyfire();
this.checkExpire();
}}
class BlastParticle extends PhysicsBody {
constructor({ firework, funky }) {
super(a);this.position = firework.position.duplicate();
let Velocity = vector.create(0.0);
if (!this.funky) {
Velocity.setLength(Math.random() * 6 + 2);
Velocity.setAngle(Math.random() * Math.PI * 2);
} else {
Velocity.setLength(Math.random() * 3 + 1);
Velocity.setAngle(firework.getAngle + Math.PI / 2 - Math.PI * 0.25 + Math.PI * . 5);
}
this.velocity = Velocity;
this.color = firework.exposionColor;
this.particleSize = Math.random() * 4;
this.TimeCreated = new Date().getTime();
this.TimeExpired = this.TimeCreated + (Math.random() * 4 + 3.5) * 100;
}
draw() {
context.strokeStyle = this.color;
context.lineWidth = this.particleSize;
let p = this.position,
lp = this.lastPosition;
context.beginPath();
context.moveTo(lp.getX(), lp.getY());
context.lineTo(p.getX(), p.getY());
context.stroke();
}
checkExpire() {
let now = new Date().getTime();
if (now >= this.TimeExpired) this.deleteObject();
}
render() {
this.draw();
this.checkExpire();
}}
document.body.addEventListener('mousedown'.function (e) {
let color = randomColor();
for (var i = 0; i < Math.floor(Math.random() * 20) + 25; i++) {
new BlastParticle({
firework: {
position: vector.create(e.pageX, e.pageY),
velocity: vector.create(0.0),
exposionColor: color },
funky: false}); }});setInterval(function () {
if(! startFireworks)return;
for (var i = 0; i < Math.floor(Math.random() * 4); i++) {
newfirework(); }},500);
function cleanupObjects() {
objects = objects.filter(o= >o ! =undefined);
}
function loop() {
context.fillStyle = 'rgba (0,0,0,0.085)';
context.fillRect(0.0, width, height);
let unusedObjectCount = 0;
objects.map(o= > {
if(! o) {unusedObjectCount++;return; } o.PhysicsUpdate(); o.render(); });if (unusedObjectCount > 100) cleanupObjects();
requestAnimationFrame(loop);
}
loop();
Copy the codeEveryone likes, favorites, comments, check the home page for you
Clocked articles updated 180/365 days