两种过年烟花，你喜欢哪一种(HTML+CSS+JS)
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两种过年烟花，你喜欢哪一种(HTML+CSS+JS)
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🎇兩種過年煙花，你喜歡哪一種🎇(HTML+CSS+JS)?
目錄
🎇兩種過年煙花，你喜歡哪一種🎇(HTML+CSS+JS)?
效果一
效果二
效果一
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<!doctype html> <html> <head> <meta charset="utf-8"> <title>HTML5炫酷喜慶全屏煙花動畫特效</title><style> /* basic styles for black background and crosshair cursor */ body {background: #000;margin: 0; }canvas {cursor: crosshair;display: block; } </style></head> <body><canvas id="canvas"></canvas><script> // when animating on canvas, it is best to use requestAnimationFrame instead of setTimeout or setInterval // not supported in all browsers though and sometimes needs a prefix, so we need a shim window.requestAnimFrame = ( function() {return window.requestAnimationFrame ||window.webkitRequestAnimationFrame ||window.mozRequestAnimationFrame ||function( callback ) {window.setTimeout( callback, 1000 / 60 );}; })();// now we will setup our basic variables for the demo var canvas = document.getElementById( 'canvas' ),ctx = canvas.getContext( '2d' ),// full screen dimensionscw = window.innerWidth,ch = window.innerHeight,// firework collectionfireworks = [],// particle collectionparticles = [],// starting huehue = 120,// when launching fireworks with a click, too many get launched at once without a limiter, one launch per 5 loop tickslimiterTotal = 5,limiterTick = 0,// this will time the auto launches of fireworks, one launch per 80 loop tickstimerTotal = 80,timerTick = 0,mousedown = false,// mouse x coordinate,mx,// mouse y coordinatemy;// set canvas dimensions canvas.width = cw; canvas.height = ch;// now we are going to setup our function placeholders for the entire demo// get a random number within a range function random( min, max ) {return Math.random() * ( max - min ) + min; }// calculate the distance between two points function calculateDistance( p1x, p1y, p2x, p2y ) {var xDistance = p1x - p2x,yDistance = p1y - p2y;return Math.sqrt( Math.pow( xDistance, 2 ) + Math.pow( yDistance, 2 ) ); }// create firework function Firework( sx, sy, tx, ty ) {// actual coordinatesthis.x = sx;this.y = sy;// starting coordinatesthis.sx = sx;this.sy = sy;// target coordinatesthis.tx = tx;this.ty = ty;// distance from starting point to targetthis.distanceToTarget = calculateDistance( sx, sy, tx, ty );this.distanceTraveled = 0;// track the past coordinates of each firework to create a trail effect, increase the coordinate count to create more prominent trailsthis.coordinates = [];this.coordinateCount = 3;// populate initial coordinate collection with the current coordinateswhile( this.coordinateCount-- ) {this.coordinates.push( [ this.x, this.y ] );}this.angle = Math.atan2( ty - sy, tx - sx );this.speed = 2;this.acceleration = 1.05;this.brightness = random( 50, 70 );// circle target indicator radiusthis.targetRadius = 1; }// update firework Firework.prototype.update = function( index ) {// remove last item in coordinates arraythis.coordinates.pop();// add current coordinates to the start of the arraythis.coordinates.unshift( [ this.x, this.y ] );// cycle the circle target indicator radiusif( this.targetRadius < 8 ) {this.targetRadius += 0.3;} else {this.targetRadius = 1;}// speed up the fireworkthis.speed *= this.acceleration;// get the current velocities based on angle and speedvar vx = Math.cos( this.angle ) * this.speed,vy = Math.sin( this.angle ) * this.speed;// how far will the firework have traveled with velocities applied?this.distanceTraveled = calculateDistance( this.sx, this.sy, this.x + vx, this.y + vy );// if the distance traveled, including velocities, is greater than the initial distance to the target, then the target has been reachedif( this.distanceTraveled >= this.distanceToTarget ) {createParticles( this.tx, this.ty );// remove the firework, use the index passed into the update function to determine which to removefireworks.splice( index, 1 );} else {// target not reached, keep travelingthis.x += vx;this.y += vy;} }// draw firework Firework.prototype.draw = function() {ctx.beginPath();// move to the last tracked coordinate in the set, then draw a line to the current x and yctx.moveTo( this.coordinates[ this.coordinates.length - 1][ 0 ], this.coordinates[ this.coordinates.length - 1][ 1 ] );ctx.lineTo( this.x, this.y );ctx.strokeStyle = 'hsl(' + hue + ', 100%, ' + this.brightness + '%)';ctx.stroke();ctx.beginPath();// draw the target for this firework with a pulsing circlectx.arc( this.tx, this.ty, this.targetRadius, 0, Math.PI * 2 );ctx.stroke(); }// create particle function Particle( x, y ) {this.x = x;this.y = y;// track the past coordinates of each particle to create a trail effect, increase the coordinate count to create more prominent trailsthis.coordinates = [];this.coordinateCount = 5;while( this.coordinateCount-- ) {this.coordinates.push( [ this.x, this.y ] );}// set a random angle in all possible directions, in radiansthis.angle = random( 0, Math.PI * 2 );this.speed = random( 1, 10 );// friction will slow the particle downthis.friction = 0.95;// gravity will be applied and pull the particle downthis.gravity = 1;// set the hue to a random number +-20 of the overall hue variablethis.hue = random( hue - 20, hue + 20 );this.brightness = random( 50, 80 );this.alpha = 1;// set how fast the particle fades outthis.decay = random( 0.015, 0.03 ); }// update particle Particle.prototype.update = function( index ) {// remove last item in coordinates arraythis.coordinates.pop();// add current coordinates to the start of the arraythis.coordinates.unshift( [ this.x, this.y ] );// slow down the particlethis.speed *= this.friction;// apply velocitythis.x += Math.cos( this.angle ) * this.speed;this.y += Math.sin( this.angle ) * this.speed + this.gravity;// fade out the particlethis.alpha -= this.decay;// remove the particle once the alpha is low enough, based on the passed in indexif( this.alpha <= this.decay ) {particles.splice( index, 1 );} }// draw particle Particle.prototype.draw = function() {ctx. beginPath();// move to the last tracked coordinates in the set, then draw a line to the current x and yctx.moveTo( this.coordinates[ this.coordinates.length - 1 ][ 0 ], this.coordinates[ this.coordinates.length - 1 ][ 1 ] );ctx.lineTo( this.x, this.y );ctx.strokeStyle = 'hsla(' + this.hue + ', 100%, ' + this.brightness + '%, ' + this.alpha + ')';ctx.stroke();}// create particle group/explosion function createParticles( x, y ) {// increase the particle count for a bigger explosion, beware of the canvas performance hit with the increased particles thoughvar particleCount = 30;while( particleCount-- ) {particles.push( new Particle( x, y ) );} }// main demo loop function loop() {// this function will run endlessly with requestAnimationFramerequestAnimFrame( loop );// increase the hue to get different colored fireworks over timehue += 0.5;// normally, clearRect() would be used to clear the canvas// we want to create a trailing effect though// setting the composite operation to destination-out will allow us to clear the canvas at a specific opacity, rather than wiping it entirelyctx.globalCompositeOperation = 'destination-out';// decrease the alpha property to create more prominent trailsctx.fillStyle = 'rgba(0, 0, 0, 0.5)';ctx.fillRect( 0, 0, cw, ch );// change the composite operation back to our main mode// lighter creates bright highlight points as the fireworks and particles overlap each otherctx.globalCompositeOperation = 'lighter';var text = "紅木香薰，祝大家：HAPPY NEW YEAR !!"; ctx.font = "50px sans-serif";var textData = ctx.measureText(text);ctx.fillStyle = "rgba("+parseInt(random(0,255))+","+parseInt(random(0,255))+","+parseInt(random(0,255))+",0.3)";ctx.fillText(text,cw /2-textData.width/2,ch/2); // loop over each firework, draw it, update itvar i = fireworks.length;while( i-- ) {fireworks[ i ].draw();fireworks[ i ].update( i );}// loop over each particle, draw it, update itvar i = particles.length;while( i-- ) {particles[ i ].draw();particles[ i ].update( i );}// launch fireworks automatically to random coordinates, when the mouse isn't downif( timerTick >= timerTotal ) {if( !mousedown ) {// start the firework at the bottom middle of the screen, then set the random target coordinates, the random y coordinates will be set within the range of the top half of the screenfor(var h=0;h<50;h++){fireworks.push( new Firework( cw / 2, ch/2, random( 0, cw ), random( 0, ch ) ) );}timerTick = 0;}} else {timerTick++;}// limit the rate at which fireworks get launched when mouse is downif( limiterTick >= limiterTotal ) {if( mousedown ) {// start the firework at the bottom middle of the screen, then set the current mouse coordinates as the targetfireworks.push( new Firework( cw / 2, ch/2, mx, my ) );limiterTick = 0;}} else {limiterTick++;} }// mouse event bindings // update the mouse coordinates on mousemove canvas.addEventListener( 'mousemove', function( e ) {mx = e.pageX - canvas.offsetLeft;my = e.pageY - canvas.offsetTop; });// toggle mousedown state and prevent canvas from being selected canvas.addEventListener( 'mousedown', function( e ) {e.preventDefault();mousedown = true; });canvas.addEventListener( 'mouseup', function( e ) {e.preventDefault();mousedown = false; });// once the window loads, we are ready for some fireworks! window.onload = loop;</script></body> </html>效果二
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<div id="tips"><a id="manual" href="javascript:;">手動放煙花</a><a id="auto" href="javascript:;">自動放煙花</a></div> <style>html,body {overflow: hidden;}body,div,p {margin: 0;padding: 0;}body {background: #000;font: 12px/1.5 arial;color: #7A7A7A;}a {text-decoration: none;outline: none;}#tips,#copyright {position: absolute;width: 100%;height: 50px;text-align: center;background: #171717;border: 2px solid #484848;}#tips {top: 0;border-width: 0 0 2px;}#tips a {font: 14px/30px arial;color: #FFF;background: #F06;display: inline-block;margin: 10px 5px 0;padding: 0 15px;border-radius: 15px;}#tips a.active {background: #FE0000;}#copyright {bottom: 0;line-height: 50px;border-width: 2px 0 0;}#copyright a {color: #FFF;background: #7A7A7A;padding: 2px 5px;border-radius: 10px;}#copyright a:hover {background: #F90;}p {position: absolute;top: 55px;width: 100%;text-align: center;} </style> <script>var fgm = {on: function (element, type, handler) {return element.addEventListener ? element.addEventListener(type, handler, false) : element.attachEvent("on" + type, handler)},un: function (element, type, handler) {return element.removeEventListener ? element.removeEventListener(type, handler, false) : element.detachEvent("on" + type, handler)},bind: function (object, handler) {return function () {return handler.apply(object, arguments)}},randomRange: function (lower, upper) { //產生范圍在lower~upper的隨機數return Math.floor(Math.random() * (upper - lower + 1) + lower)},getRanColor: function () { //隨機獲得十六進制顏色var str = this.randomRange(0, 0xFFFFFF).toString(16);while (str.length < 6) str = "0" + str;return "#" + str}};//初始化對象function FireWorks() {this.type = 0;this.timer = null;this.fnManual = fgm.bind(this, this.manual)}FireWorks.prototype = {initialize: function () {clearTimeout(this.timer);fgm.un(document, "click", this.fnManual);switch (this.type) {case 1:fgm.on(document, "click", this.fnManual);break;case 2:this.auto();break;};},manual: function (event) {event = event || window.event;this.__create__({x: event.clientX,y: event.clientY});},auto: function () {var that = this;that.timer = setTimeout(function () {that.__create__({x: fgm.randomRange(50, document.documentElement.clientWidth - 50),y: fgm.randomRange(50, document.documentElement.clientHeight - 150)})that.auto();}, fgm.randomRange(900, 1100))},__create__: function (param) {//param即鼠標點擊點（即煙花爆炸點）var that = this;var oEntity = null;var oChip = null;var aChip = [];var timer = null;var oFrag = document.createDocumentFragment();oEntity = document.createElement("div");with (oEntity.style) { //煙花上升過程實體初始化position = "absolute";//初始位置距網頁頂部為：整個網頁的高度（處于網頁底部）top = document.documentElement.clientHeight + "px";left = param.x + "px";width = "4px";height = "30px";borderRadius = "4px";background = fgm.getRanColor();};document.body.appendChild(oEntity);//window.setInterval方法 該方法使得一個函數每隔固定時間被調用一次// console.log(param.y);oEntity.timer = setInterval(function () {// console.log(oEntity.offsetTop);// console.log(oEntity.style.top);oEntity.style.top = oEntity.offsetTop - 20 + "px";//判斷煙花是否上升到或者第一次超過上次鼠標點擊位置if (oEntity.offsetTop <= param.y) {//煙花爆炸clearInterval(oEntity.timer);document.body.removeChild(oEntity);(function () {//在50-100之間隨機生成碎片//由于IE瀏覽器處理效率低, 隨機范圍縮小至20-30//自動放煙花時, 隨機范圍縮小至20-30var len = (/msie/i.test(navigator.userAgent) || that.type == 2) ? fgm.randomRange(20, 30) : fgm.randomRange(50, 100)//產生所有煙花爆炸顆粒實體for (i = 0; i < len; i++) {//煙花顆粒形態實體oChip = document.createElement("div");with (oChip.style) {position = "absolute";top = param.y + "px";left = param.x + "px";width = "4px";height = "4px";overflow = "hidden";borderRadius = "4px";background = fgm.getRanColor();};oChip.speedX = fgm.randomRange(-20, 20);oChip.speedY = fgm.randomRange(-20, 20);oFrag.appendChild(oChip);aChip[i] = oChip};document.body.appendChild(oFrag);timer = setInterval(function () {for (i = 0; i < aChip.length; i++) {var obj = aChip[i];with (obj.style) {top = obj.offsetTop + obj.speedY + "px";left = obj.offsetLeft + obj.speedX + "px";};obj.speedY++;//判斷煙花爆炸顆粒是否掉落至窗體之外，為真則remove//splice() 方法可刪除從 index 處開始的零個或多個元素(obj.offsetTop < 0 || obj.offsetLeft < 0 || obj.offsetTop > document.documentElement.clientHeight || obj.offsetLeft > document.documentElement.clientWidth) && (document.body.removeChild(obj), aChip.splice(i, 1))};//判斷煙花爆炸顆粒是否全部remove，為真則clearInterval(timer);!aChip[0] && clearInterval(timer);}, 30)})()}}, 30)}};fgm.on(window, "load", function () {var oTips = document.getElementById("tips");var aBtn = oTips.getElementsByTagName("a");var oFireWorks = new FireWorks();fgm.on(oTips, "click", function (event) {var oEvent = event || window.event;var oTarget = oEvent.target || oEvent.srcElement;var i = 0;if (oTarget.tagName.toUpperCase() == "A") {for (i = 0; i < aBtn.length; i++) aBtn[i].className = "";switch (oTarget.id) {case "manual":oFireWorks.type = 1;break;case "auto":oFireWorks.type = 2;break;case "stop":oFireWorks.type = 0;break;}oFireWorks.initialize();oTarget.className = "active";//阻止瀏覽器默認的事件冒泡行為oEvent.stopPropagation ? oEvent.stopPropagation() : oEvent.cancelBubble = true}});});fgm.on(document, "contextmenu", function (event) {var oEvent = event || window.event;oEvent.preventDefault ? oEvent.preventDefault() : oEvent.returnValue = false});</script> 與50位技術專家面對面20年技術見證，附贈技術全景圖總結
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