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近項(xiàng)目需要，寫一些動(dòng)畫效果，下面對(duì)animation的知識(shí)鞏固了一下，希望可以幫助到有需要的小伙伴們。
animation-name 需要綁定到選擇器的 keyframe 名稱
animation-duration 完成動(dòng)畫所需要的時(shí)間
animation-delay 設(shè)置延長(zhǎng)時(shí)間
animation-timing-function 動(dòng)畫的運(yùn)動(dòng)速度
animation-iteration-count 動(dòng)畫播放的次數(shù)
infinite 規(guī)定動(dòng)畫應(yīng)該無限次播放。
animation-direction 輪流反向播放動(dòng)畫
這個(gè)先介紹到這里吧，下面分享幾個(gè)demo！！！
1、animation1
<div class="spinner">
<div class="rect1"></div>
<div class="rect2"></div>
<div class="rect3"></div>
<div class="rect4"></div>
<div class="rect5"></div>
</div>
<style>
.spinner {
margin: 100px auto;
width: 50px;
height: 60px;
text-align: center;
font-size: 10px;
}
.spinner > div {
background-color: #67CF22;
height: 100%;
width: 6px;
display: inline-block;
-webkit-animation: stretchdelay 1.2s infinite ease-in-out;
animation: stretchdelay 1.2s infinite ease-in-out;
}
.spinner .rect2 {
-webkit-animation-delay: -1.1s;
animation-delay: -1.1s;
}
.spinner .rect3 {
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}
.spinner .rect4 {
-webkit-animation-delay: -0.9s;
animation-delay: -0.9s;
}
.spinner .rect5 {
-webkit-animation-delay: -0.8s;
animation-delay: -0.8s;
}
@-webkit-keyframes stretchdelay {
0%, 40%, 100% { -webkit-transform: scaleY(0.4) }
20% { -webkit-transform: scaleY(1.0) }
}
@keyframes stretchdelay {
0%, 40%, 100% {
transform: scaleY(0.4);
-webkit-transform: scaleY(0.4);
} 20% {
transform: scaleY(1.0);
-webkit-transform: scaleY(1.0);
}
}
</style>
<div class="spinner"></div>
<style>
.spinner {
width: 60px;
height: 60px;
background-color: #67CF22;
margin: 100px auto;
-webkit-animation: rotateplane 1.2s infinite ease-in-out;
animation: rotateplane 1.2s infinite ease-in-out;
}
@-webkit-keyframes rotateplane {
0% { -webkit-transform: perspective(120px) }
50% { -webkit-transform: perspective(120px) rotateY(180deg) }
100% { -webkit-transform: perspective(120px) rotateY(180deg) rotateX(180deg) }
}
@keyframes rotateplane {
0% {
transform: perspective(120px) rotateX(0deg) rotateY(0deg);
-webkit-transform: perspective(120px) rotateX(0deg) rotateY(0deg)
} 50% {
transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
-webkit-transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg)
} 100% {
transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
-webkit-transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
}
}
</style>
<div class="spinner">
<div class="double-bounce1"></div>
<div class="double-bounce2"></div>
</div>
<style>
.spinner {
width: 60px;
height: 60px;
position: relative;
margin: 100px auto;
}
.double-bounce1, .double-bounce2 {
width: 100%;
height: 100%;
border-radius: 50%;
background-color: #67CF22;
opacity: 0.6;
position: absolute;
top: 0;
left: 0;
-webkit-animation: bounce 2.0s infinite ease-in-out;
animation: bounce 2.0s infinite ease-in-out;
}
.double-bounce2 {
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}
@-webkit-keyframes bounce {
0%, 100% { -webkit-transform: scale(0.0) }
50% { -webkit-transform: scale(1.0) }
}
@keyframes bounce {
0%, 100% {
transform: scale(0.0);
-webkit-transform: scale(0.0);
} 50% {
transform: scale(1.0);
-webkit-transform: scale(1.0);
}
}
</style>
<div class="spinner">
<div class="dot1"></div>
<div class="dot2"></div>
</div>
<style>
.spinner {
margin: 100px auto;
width: 90px;
height: 90px;
position: relative;
text-align: center;
-webkit-animation: rotate 2.0s infinite linear;
animation: rotate 2.0s infinite linear;
}
.dot1, .dot2 {
width: 60%;
height: 60%;
display: inline-block;
position: absolute;
top: 0;
background-color: #67CF22;
border-radius: 100%;
-webkit-animation: bounce 2.0s infinite ease-in-out;
animation: bounce 2.0s infinite ease-in-out;
}
.dot2 {
top: auto;
bottom: 0px;
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}
@-webkit-keyframes rotate { 100% { -webkit-transform: rotate(360deg) }}
@keyframes rotate { 100% { transform: rotate(360deg); -webkit-transform: rotate(360deg) }}
@-webkit-keyframes bounce {
0%, 100% { -webkit-transform: scale(0.0) }
50% { -webkit-transform: scale(1.0) }
}
@keyframes bounce {
0%, 100% {
transform: scale(0.0);
-webkit-transform: scale(0.0);
} 50% {
transform: scale(1.0);
-webkit-transform: scale(1.0);
}
}
</style>
<div class="spinner">
<div class="bounce1"></div>
<div class="bounce2"></div>
<div class="bounce3"></div>
</div>
<style>
.spinner {
margin: 100px auto 0;
width: 150px;
text-align: center;
}
.spinner > div {
width: 30px;
height: 30px;
background-color: #67CF22;
border-radius: 100%;
display: inline-block;
-webkit-animation: bouncedelay 1.4s infinite ease-in-out;
animation: bouncedelay 1.4s infinite ease-in-out;
/* Prevent first frame from flickering when animation starts */
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
}
.spinner .bounce1 {
-webkit-animation-delay: -0.32s;
animation-delay: -0.32s;
}
.spinner .bounce2 {
-webkit-animation-delay: -0.16s;
animation-delay: -0.16s;
}
@-webkit-keyframes bouncedelay {
0%, 80%, 100% { -webkit-transform: scale(0.0) }
40% { -webkit-transform: scale(1.0) }
}
@keyframes bouncedelay {
0%, 80%, 100% {
transform: scale(0.0);
-webkit-transform: scale(0.0);
} 40% {
transform: scale(1.0);
-webkit-transform: scale(1.0);
}
}
</style>
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SS3 Animations
1 @keyframes屬性
@keyframes 動(dòng)畫名稱{關(guān)鍵幀持續(xù)時(shí)間% {css樣式;}}
@keyframes myanimation
{
0% {top:0px;background-color:#0000cc;}
50% {top:100px;background-color;#339900;}
100% {top:0px;background-color:#330000;}
}2 animation屬性
animation: name duration timing-function delay iteration-count direction;
animation-name 規(guī)定需要綁定到選擇器的 keyframe 名稱。。
animation-duration 規(guī)定完成動(dòng)畫所花費(fèi)的時(shí)間, 以秒或毫秒計(jì)。
animation-timing-function 規(guī)定動(dòng)畫的速度曲線。
linear 動(dòng)畫從頭到尾的速度是相同的。
ease 默認(rèn)。動(dòng)畫以低速開始, 然后加快, 在結(jié)束前變慢。
ease-in 動(dòng)畫以低速開始。
ease-out 動(dòng)畫以低速結(jié)束。
ease-in-out 動(dòng)畫以低速開始和結(jié)束。
cubic-bezier(n,n,n,n) 在 cubic-bezier 函數(shù)中自己的值?？赡艿闹凳菑?0 到 1 的數(shù)值。 參考地址: http://cubic-bezier.com/#.17,.67,.83,.67
animation-delay 規(guī)定在動(dòng)畫開始之前的延遲。以秒或毫秒計(jì), 默認(rèn)值是 0。
animation-iteration-count 規(guī)定動(dòng)畫應(yīng)該播放的次數(shù)。
n 定義動(dòng)畫播放次數(shù)的數(shù)值。
infinite 規(guī)定動(dòng)畫應(yīng)該無限次播放。
animation-direction 規(guī)定是否應(yīng)該輪流反向播放動(dòng)畫。
normal 默認(rèn)值。動(dòng)畫應(yīng)該正常播放。
alternate 動(dòng)畫應(yīng)該輪流反向播放。
使用方法一: from...to...
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
div{
width: 100px;
height: 100px;
background-color: orange;
}
/*div:hover{
width: 800px;
}*/
/*@keyframes 動(dòng)畫名{
from{
動(dòng)畫第一步(這里你可以不寫他會(huì)繼承上面的)
}
to{
動(dòng)畫最后一步
}
}*/
/*動(dòng)畫聲明*/
@keyframes widthChange{
/*from{
width: 100px;
}*/
to{
width: 800px;
}
}
div{
/*animation: 動(dòng)畫名稱 過渡總時(shí)長(zhǎng);*/
animation: widthChange 1s;
}
</style>
</head>
<body>
<div></div>
</body>
</html>使用方法二: 百分比
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
div{
width: 100px;
height: 100px;
background-color: orange;
position: absolute;
left: 0;
top: 0;
}
/*動(dòng)畫聲明*/
@keyframes positionChange{
/*from{
left: 0;
}
to{
left: 800px;
}*/
/*百分?jǐn)?shù)評(píng)分的的過渡總時(shí)長(zhǎng)*/
0%{
left: 0;
top: 0;
}
50%{
left: 800px;
top: 0;
}
100%{
left: 800px;
top: 500px;
}
}
div{
/*animation: 動(dòng)畫名稱 過渡總時(shí)長(zhǎng);*/
animation: positionChange 10s;
}
</style>
</head>
<body>
<div></div>
</body>
</html>使用方法三: animation參數(shù)格式
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
div{
width: 100px;
height: 100px;
background-color: orange;
}
@keyframes widthChange{
to{
width: 800px;
}
}
div{
/*
* 動(dòng)畫名稱
* 動(dòng)畫總時(shí)長(zhǎng)s ms
* 動(dòng)畫形式ease ease-in ease-out ease-in-out linear 貝塞爾曲線、
* 延遲時(shí)間s ms
* 循環(huán)次數(shù)①阿拉伯?dāng)?shù)字②infinite(無限次)
* 停留到最后一幀forwards
* 反向播放動(dòng)畫alternate(來回當(dāng)做2次處理) normal 正常
*
* */
animation: widthChange 5s;
}
div:hover{
/*動(dòng)畫停止*/
animation-play-state: paused
}
</style>
</head>
<body>
<div></div>
</body>
</html>建立3D場(chǎng)景
transform-style 屬性規(guī)定如何在 3D 空間中呈現(xiàn)被嵌套的元素。
注釋：該屬性必須與 transform 屬性一同使用。
flat 子元素將不保留其 3D 位置。
preserve-3d 子元素將保留其 3D 位置。
transform-style: flat|preserve-3d;
perspective 屬性定義 3D 元素距視圖的距離, 以像素計(jì)。該屬性允許您改變 3D 元素查看 3D 元素的視圖。
當(dāng)為元素定義 perspective 屬性時(shí), 其子元素會(huì)獲得透視效果, 而不是元素本身。
注釋：perspective 屬性只影響 3D 轉(zhuǎn)換元素。
perspective: number|none;
景深:
perspective是設(shè)置3d效果的景深, 通俗來說就是設(shè)置你的眼睛與這個(gè)3d元素的距離。
而生活經(jīng)驗(yàn)告訴我們, 你從遠(yuǎn)處和近處分別觀察同一個(gè)物體(比如正方形)時(shí), 其3d效果肯定是不同的。
perspective-origin 屬性定義 3D 元素所基于的 X 軸和 Y 軸。該屬性允許您改變 3D 元素的底部位置。
當(dāng)為元素定義 perspective-origin 屬性時(shí), 其子元素會(huì)獲得透視效果, 而不是元素本身。
注釋：該屬性必須與 perspective 屬性一同使用, 而且只影響 3D 轉(zhuǎn)換元素。
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
list-style: none;
}
div{
width: 300px;
height: 220px;
margin: 100px auto;
border: 1px solid #000;
transform-style: preserve-3d;
perspective: 800px;
/*景深基點(diǎn)基本上沒人改*/
perspective-origin: left top;
}
img{
width: 100%;
display: block;
transition: 1s;
}
div:hover>img{
transform: rotateX(-45deg);
}
</style>
</head>
<body>
<div>
<img src="img/薛凱琪.jpg"/>
</div>
</body>
</html>backface-visibility 屬性定義當(dāng)元素不面向屏幕時(shí)是否可見。
如果在旋轉(zhuǎn)元素不希望看到其背面時(shí), 該屬性很有用。
背面隱藏
言：每當(dāng)過節(jié)的時(shí)候，女朋友就抱怨我總是忘記給她買花，說程序不懂浪漫，這不我準(zhǔn)備了幾款愛心動(dòng)畫特效，打算當(dāng)面向她表達(dá)一下。
寓意：告白無須多么華麗的語言，一顆顆小的愛心匯聚成一顆真心，讓你的另一半感受到濃濃的愛意。
代碼難度系數(shù)★★★
新建index.html，復(fù)制以下代碼保存在瀏覽器中打開即可。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>canvas 心</title>
<style>
html, body {
height: 100%;
padding: 0;
margin: 0;
background: #000;
}
canvas {
position: absolute;
width: 100%;
height: 100%;
}</style>
</head>
<body>
<canvas id="pinkboard"></canvas>
<script>
/*
* Settings
*/
var settings = {
particles: {
length: 500, // maximum amount of particles
duration: 2, // particle duration in sec
velocity: 100, // particle velocity in pixels/sec
effect: -0.75, // play with this for a nice effect
size: 30, // particle size in pixels
},
};
/*
* RequestAnimationFrame polyfill by Erik M?ller
*/
(function(){var b=0;var c=["ms","moz","webkit","o"];for(var a=0;a<c.length&&!window.requestAnimationFrame;++a){window.requestAnimationFrame=window[c[a]+"RequestAnimationFrame"];window.cancelAnimationFrame=window[c[a]+"CancelAnimationFrame"]||window[c[a]+"CancelRequestAnimationFrame"]}if(!window.requestAnimationFrame){window.requestAnimationFrame=function(h,e){var d=new Date().getTime();var f=Math.max(0,16-(d-b));var g=window.setTimeout(function(){h(d+f)},f);b=d+f;return g}}if(!window.cancelAnimationFrame){window.cancelAnimationFrame=function(d){clearTimeout(d)}}}());
/*
* Point class
*/
var Point = (function() {
function Point(x, y) {
this.x = (typeof x !== 'undefined') ? x : 0;
this.y = (typeof y !== 'undefined') ? y : 0;
}
Point.prototype.clone = function() {
return new Point(this.x, this.y);
};
Point.prototype.length = function(length) {
if (typeof length == 'undefined')
return Math.sqrt(this.x * this.x + this.y * this.y);
this.normalize();
this.x *= length;
this.y *= length;
return this;
};
Point.prototype.normalize = function() {
var length = this.length();
this.x /= length;
this.y /= length;
return this;
};
return Point;
})();
/*
* Particle class
*/
var Particle = (function() {
function Particle() {
this.position = new Point();
this.velocity = new Point();
this.acceleration = new Point();
this.age = 0;
}
Particle.prototype.initialize = function(x, y, dx, dy) {
this.position.x = x;
this.position.y = y;
this.velocity.x = dx;
this.velocity.y = dy;
this.acceleration.x = dx * settings.particles.effect;
this.acceleration.y = dy * settings.particles.effect;
this.age = 0;
};
Particle.prototype.update = function(deltaTime) {
this.position.x += this.velocity.x * deltaTime;
this.position.y += this.velocity.y * deltaTime;
this.velocity.x += this.acceleration.x * deltaTime;
this.velocity.y += this.acceleration.y * deltaTime;
this.age += deltaTime;
};
Particle.prototype.draw = function(context, image) {
function ease(t) {
return (--t) * t * t + 1;
}
var size = image.width * ease(this.age / settings.particles.duration);
context.globalAlpha = 1 - this.age / settings.particles.duration;
context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size);
};
return Particle;
})();
/*
* ParticlePool class
*/
var ParticlePool = (function() {
var particles,
firstActive = 0,
firstFree = 0,
duration = settings.particles.duration;
function ParticlePool(length) {
// create and populate particle pool
particles = new Array(length);
for (var i = 0; i < particles.length; i++)
particles[i] = new Particle();
}
ParticlePool.prototype.add = function(x, y, dx, dy) {
particles[firstFree].initialize(x, y, dx, dy);
// handle circular queue
firstFree++;
if (firstFree == particles.length) firstFree = 0;
if (firstActive == firstFree ) firstActive++;
if (firstActive == particles.length) firstActive = 0;
};
ParticlePool.prototype.update = function(deltaTime) {
var i;
// update active particles
if (firstActive < firstFree) {
for (i = firstActive; i < firstFree; i++)
particles[i].update(deltaTime);
}
if (firstFree < firstActive) {
for (i = firstActive; i < particles.length; i++)
particles[i].update(deltaTime);
for (i = 0; i < firstFree; i++)
particles[i].update(deltaTime);
}
// remove inactive particles
while (particles[firstActive].age >= duration && firstActive != firstFree) {
firstActive++;
if (firstActive == particles.length) firstActive = 0;
}
};
ParticlePool.prototype.draw = function(context, image) {
// draw active particles
if (firstActive < firstFree) {
for (i = firstActive; i < firstFree; i++)
particles[i].draw(context, image);
}
if (firstFree < firstActive) {
for (i = firstActive; i < particles.length; i++)
particles[i].draw(context, image);
for (i = 0; i < firstFree; i++)
particles[i].draw(context, image);
}
};
return ParticlePool;
})();
/*
* Putting it all together
*/
(function(canvas) {
var context = canvas.getContext('2d'),
particles = new ParticlePool(settings.particles.length),
particleRate = settings.particles.length / settings.particles.duration, // particles/sec
time;
// get point on heart with -PI <= t <= PI
function pointOnHeart(t) {
return new Point(
160 * Math.pow(Math.sin(t), 3),
130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25
);
}
// creating the particle image using a dummy canvas
var image = (function() {
var canvas = document.createElement('canvas'),
context = canvas.getContext('2d');
canvas.width = settings.particles.size;
canvas.height = settings.particles.size;
// helper function to create the path
function to(t) {
var point = pointOnHeart(t);
point.x = settings.particles.size / 2 + point.x * settings.particles.size / 350;
point.y = settings.particles.size / 2 - point.y * settings.particles.size / 350;
return point;
}
// create the path
context.beginPath();
var t = -Math.PI;
var point = to(t);
context.moveTo(point.x, point.y);
while (t < Math.PI) {
t += 0.01; // baby steps!
point = to(t);
context.lineTo(point.x, point.y);
}
context.closePath();
// create the fill
context.fillStyle = '#ea80b0';
context.fill();
// create the image
var image = new Image();
image.src = canvas.toDataURL();
return image;
})();
// render that thing!
function render() {
// next animation frame
requestAnimationFrame(render);
// update time
var newTime = new Date().getTime() / 1000,
deltaTime = newTime - (time || newTime);
time = newTime;
// clear canvas
context.clearRect(0, 0, canvas.width, canvas.height);
// create new particles
var amount = particleRate * deltaTime;
for (var i = 0; i < amount; i++) {
var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
var dir = pos.clone().length(settings.particles.velocity);
particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y);
}
// update and draw particles
particles.update(deltaTime);
particles.draw(context, image);
}
// handle (re-)sizing of the canvas
function onResize() {
canvas.width = canvas.clientWidth;
canvas.height = canvas.clientHeight;
}
window.onresize = onResize;
// delay rendering bootstrap
setTimeout(function() {
onResize();
render();
}, 10);
})(document.getElementById('pinkboard'));</script>
</body>
</html>
寓意：將想說的話打開一顆顆的愛心氣球上，隨著氣球不斷的升空，讓整個(gè)氛圍可更加地纏綿，看到此處可以有感動(dòng)的淚水。
代碼難度系數(shù)★★★
新建index.html，復(fù)制以下代碼保存在瀏覽器中打開即可。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>情人節(jié)快樂:)</title>
<style>
canvas {
position: absolute;
top: 0;
left: 0;
}</style>
</head>
<body>
<canvas id=c></canvas>
<script>
var w = c.width = window.innerWidth,
h = c.height = window.innerHeight,
ctx = c.getContext( '2d' ),
opts = {
phrases: [ "Don't die\nit's not hard", "You're the Best", "Every day,\nYou're beautiful", "Every occasion,\nYou're clever", "A world without You?\nNah", "Keep kicking ass", "You're better than them,\nwhoever they are", "You're just amazing", "You are,\ntherefore I am", "Nothing better than You \ncould have happened to the world" ],
balloons: 10,
baseVelY: -1,
addedVelY: -1,
baseVelX: -.25,
addedVelX: .5,
baseSize: 20,
addedSize: 10,
baseSizeAdder: 2,
addedSizeAdder: 2,
baseIncrementer: .01,
addedIncrementer: .03,
baseHue: -10,
addedHue: 30,
font: '15px Verdana'
},
cycle = 0,
balloons = [];
ctx.font = opts.font;
function Balloon(){
this.reset();
}
Balloon.prototype.reset = function(){
this.size = opts.baseSize + opts.addedSize * Math.random();
this.sizeAdder = opts.baseSizeAdder + opts.addedSizeAdder * Math.random();
this.incrementer = opts.baseIncrementer + opts.addedIncrementer * Math.random();
this.tick = 0;
this.x = Math.random() * w;
this.y = h + this.size;
this.vx = opts.baseVelX + opts.addedVelX * Math.random();
this.vy = opts.baseVelY + opts.addedVelY * Math.random();
this.color = 'hsla(hue,70%,60%,.8)'.replace( 'hue', opts.baseHue + opts.addedHue * Math.random() );
this.phrase = opts.phrases[ ++cycle % opts.phrases.length ].split( '\n' );
this.lengths = [];
for( var i = 0; i < this.phrase.length; ++i )
this.lengths.push( -ctx.measureText( this.phrase[ i ] ).width / 2 );
}
Balloon.prototype.step = function(){
this.tick += this.incrementer;
this.x += this.vx;
this.y += this.vy;
var size = this.size + this.sizeAdder * Math.sin( this.tick );
ctx.lineWidth = size / 40;
ctx.strokeStyle = '#eee';
ctx.beginPath();
ctx.moveTo( this.x, this.y - 2 );
ctx.lineTo( this.x, this.y + size );
ctx.stroke();
ctx.fillStyle = this.color;
ctx.translate( this.x, this.y );
ctx.rotate( Math.PI / 4 );
//ctx.fillRect( -size / 2, -size / 2, size / 2, size / 2 );
ctx.beginPath();
ctx.moveTo( 0, 0 );
ctx.arc( -size / 2, -size / 2 + size / 4, size / 4, Math.PI / 2, Math.PI * 3 / 2 );
ctx.arc( -size / 2 + size / 4, -size / 2, size / 4, Math.PI, Math.PI * 2 );
ctx.lineTo( 0, 0 );
ctx.fill();
ctx.rotate( -Math.PI / 4 );
ctx.translate( -this.x, -this.y );
ctx.translate( this.x, this.y + size + 15 );
ctx.scale( size / this.size, size / this.size );
ctx.fillStyle = '#eee';
for( var i = 0; i < this.phrase.length; ++i )
ctx.fillText( this.phrase[ i ], this.lengths[ i ], i * 15 );
ctx.scale( this.size / size, this.size / size );
ctx.translate( -this.x, -( this.y + size + 15 ) );
if( this.y < -size * 3 )
this.reset();
}
function anim(){
window.requestAnimationFrame( anim );
ctx.fillStyle = '#222';
ctx.fillRect( 0, 0, w, h );
if( balloons.length < opts.balloons && Math.random() < .01 )
balloons.push( new Balloon );
for( var i = 0; i < balloons.length; ++i )
balloons[ i ].step();
}
anim();</script>
</body>
</html>
寓意：天空中下起了愛心雨，襯托的房間變得溫暖，也讓整個(gè)場(chǎng)景都變得溫馨無比，想必此時(shí)可以有一個(gè)大大的擁抱。
代碼難度系數(shù)★★★
代碼有image、js和html，所以不好貼出來，有需要的朋友直接問我要吧。
總結(jié)：程序員的工作本身就很枯燥，特定找了幾個(gè)好看的特效拿出來和大家分享，希望大家能夠快樂每一天，上述代碼親測(cè)可用，歡迎點(diǎn)贊收藏。
《完》
大家如果喜歡的話麻煩點(diǎn)贊、關(guān)注、轉(zhuǎn)發(fā)，謝謝大家。
*請(qǐng)認(rèn)真填寫需求信息，我們會(huì)在24小時(shí)內(nèi)與您取得聯(lián)系。
