[收藏]一些js特效

鼠标跟随特效
鼠标后有随机颜色的❄跟随

(function fairyDustCursor(){var possibleColors=["#D61C59","#E7D84B","#1B8798"];var width=window.innerWidth;var height=window.innerHeight;var cursor={x:width/2,y:width/2};var particles=[];function init(){bindEvents();loop()}function bindEvents(){document.addEventListener("mousemove",onMouseMove);window.addEventListener("resize",onWindowResize)}function onWindowResize(e){width=window.innerWidth;height=window.innerHeight}function onMouseMove(e){cursor.x=e.clientX;cursor.y=e.clientY;addParticle(cursor.x,cursor.y,possibleColors[Math.floor(Math.random()*possibleColors.length)])}function addParticle(x,y,color){var particle=new Particle();particle.init(x,y,color);particles.push(particle)}function updateParticles(){for(var i=0;i<particles.length;i++){particles[i].update()}for(var i=particles.length-1;i>=0;i--){if(particles[i].lifeSpan<0){particles[i].die();particles.splice(i,1)}}}function loop(){requestAnimationFrame(loop);updateParticles()}function Particle(){this.character="❉";this.lifeSpan=60;this.initialStyles={"position":"fixed","display":"inline-block","top":"0px","left":"0px","pointerEvents":"none","touch-action":"none","z-index":"10000000","fontSize":"25px","will-change":"transform"};this.init=function(x,y,color){this.velocity={x:(Math.random()<0.5?-1:1)*(Math.random()/2),y:1};this.position={x:x+10,y:y+10};this.initialStyles.color=color;this.element=document.createElement("span");this.element.innerHTML=this.character;applyProperties(this.element,this.initialStyles);this.update();document.querySelector(".js-cursor-container").appendChild(this.element)};this.update=function(){this.position.x+=this.velocity.x;this.position.y+=this.velocity.y;this.lifeSpan--;this.element.style.transform="translate3d("+this.position.x+"px,"+this.position.y+"px, 0) scale("+(this.lifeSpan/120)+")"};this.die=function(){this.element.parentNode.removeChild(this.element)}}function applyProperties(target,properties){for(var key in properties){target.style[key]=properties[key]}}if(!("ontouchstart" in window||navigator.msMaxTouchPoints)){init()}})();

鼠标点击特效
点击鼠标左键，出现小图片[需要引入图片background-image:url(./img/jump-pig.gif)]

(function(window,document,undefined){var hearts=[];window.requestAnimationFrame=(function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(callback){setTimeout(callback,1000/60)}})();init();function init(){css(".heart{z-index:100000000;width:50px;height:50px;position:fixed;background-image:url(./img/jump-pig.gif);background-size:50px 50px;");attachEvent();gameloop()}function gameloop(){for(var i=0;i<hearts.length;i++){if(hearts[i].alpha<=0){document.body.removeChild(hearts[i].el);hearts.splice(i,1);continue}hearts[i].y--;hearts[i].scale+=0.004;hearts[i].alpha-=0.013;hearts[i].el.style.cssText="left:"+hearts[i].x+"px;top:"+hearts[i].y+"px;opacity:"+hearts[i].alpha+";transform:scale("+hearts[i].scale+","+hearts[i].scale+");"}requestAnimationFrame(gameloop)}function attachEvent(){var old=typeof window.onclick==="function"&&window.onclick;window.onclick=function(event){old&&old();createHeart(event)}}function createHeart(event){var d=document.createElement("div");d.className="heart";hearts.push({el:d,x:event.clientX-5,y:event.clientY-35,scale:1,alpha:1});document.body.appendChild(d)}function css(css){var style=document.createElement("style");style.type="text/css";try{style.appendChild(document.createTextNode(css))}catch(ex){style.styleSheet.cssText=css}document.getElementsByTagName("head")[0].appendChild(style)}})(window,document);

飞速烟花特效
随机烟花；点击鼠标左键，向箭头处发射烟花；长按鼠标左键，发射连续烟花；
[需要引入jquery文件并设置一个canvas容器 <canvas id="canvas"></canvas>]

//https://www.cnblogs.com/fpcbk/var timer = setInterval(function(){$(".box > div").animate({'marginLeft': 1000,},{queue:true, duration:5000,complete:function a(){$(".box > div").css('transform','rotateY(180deg)');}}).animate({'marginLeft': 50,},5000,function(){$(".box > div").css('transform','rotateY(0deg)');});},1000);// 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 shimwindow.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 demovar 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 dimensionscanvas.width = cw;canvas.height = ch;// now we are going to setup our function placeholders for the entire demo// get a random number within a rangefunction random( min, max ) {return Math.random() * ( max - min ) + min;}// calculate the distance between two pointsfunction calculateDistance( p1x, p1y, p2x, p2y ) {var xDistance = p1x - p2x,yDistance = p1y - p2y;return Math.sqrt( Math.pow( xDistance, 2 ) + Math.pow( yDistance, 2 ) );}// create fireworkfunction 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 fireworkFirework.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 fireworkFirework.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 particlefunction 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 particleParticle.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 particleParticle.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/explosionfunction 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 loopfunction 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';// 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 screenfireworks.push( new Firework( cw / 2, ch, random( 0, cw ), random( 0, ch / 2 ) ) );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, mx, my ) );limiterTick = 0;}} else {limiterTick++;}}// mouse event bindings// update the mouse coordinates on mousemovecanvas.addEventListener( 'mousemove', function( e ) {mx = e.pageX - canvas.offsetLeft;my = e.pageY - canvas.offsetTop;});// toggle mousedown state and prevent canvas from being selectedcanvas.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;

雪花特效
[随机出现雪花飘落]

/* 雪花特效 来自：https://blog.csdn.net/buyueliuying/article/details/78797726http://www.schillmania.com/projects/snowstorm/
*/(function($){  $.fn.snow = function(options){  var $flake = $('<div/>').css({'position': 'absolute','z-index':'9999', 'top': '-50px'}).html('❄'),  documentHeight  = $(document).height(),documentWidth   = $(document).width(),  defaults = {  minSize     : 10,  maxSize     : 20,  newOn       : 1000,  flakeColor  : "#AFDAEF" /* 雪花颜色 */},options = $.extend({}, defaults, options);endPositionTop = documentHeight - documentHeight * 0.3;var interval= setInterval( function(){var startPositionLeft = Math.random() * documentWidth - 100,  startOpacity = 0.5 + Math.random(),  sizeFlake = options.minSize + Math.random() * options.maxSize,  endPositionLeft = startPositionLeft - 500 + Math.random() * 500,  durationFall = documentHeight * 10 + Math.random() * 5000;  $flake.clone().appendTo('body').css({  left: startPositionLeft,  opacity: startOpacity,'font-size': sizeFlake,color: options.flakeColor  }).animate({  top: endPositionTop,  left: endPositionLeft,  opacity: 0.2  },durationFall,'linear',function(){  $(this).remove()});  }, options.newOn);  };  })(jQuery);  $(function(){  $.fn.snow({minSize: 10, /* 定义雪花最小尺寸 */  maxSize: 45,/* 定义雪花最大尺寸 */  newOn: 3000  /* 定义密集程度，数字越小越密集，cup使用率越高,建议最高设置成3000 */});  });

鼠标特效
[点击右键，出校粒子迸溅效果]

/*
来自：https://blog-static.cnblogs.com/files/graytido/cursor-effects.js
*/
class Circle {constructor({ origin, speed, color, angle, context }) {this.origin = originthis.position = { ...this.origin }this.color = colorthis.speed = speedthis.angle = anglethis.context = contextthis.renderCount = 0}draw() {this.context.fillStyle = this.colorthis.context.beginPath()this.context.arc(this.position.x, this.position.y, 2, 0, Math.PI * 2)this.context.fill()}move() {this.position.x = (Math.sin(this.angle) * this.speed) + this.position.xthis.position.y = (Math.cos(this.angle) * this.speed) + this.position.y + (this.renderCount * 0.3)this.renderCount++}
}class Boom {constructor ({ origin, context, circleCount = 10, area }) {this.origin = originthis.context = contextthis.circleCount = circleCountthis.area = areathis.stop = falsethis.circles = []}randomArray(range) {const length = range.lengthconst randomIndex = Math.floor(length * Math.random())return range[randomIndex]}randomColor() {const range = ['8', '9', 'A', 'B', 'C', 'D', 'E', 'F']return '#' + this.randomArray(range) + this.randomArray(range) + this.randomArray(range) + this.randomArray(range) + this.randomArray(range) + this.randomArray(range)}randomRange(start, end) {return (end - start) * Math.random() + start}init() {for(let i = 0; i < this.circleCount; i++) {const circle = new Circle({context: this.context,origin: this.origin,color: this.randomColor(),angle: this.randomRange(Math.PI - 1, Math.PI + 1),speed: this.randomRange(1, 6)})this.circles.push(circle)}}move() {this.circles.forEach((circle, index) => {if (circle.position.x > this.area.width || circle.position.y > this.area.height) {return this.circles.splice(index, 1)}circle.move()})if (this.circles.length == 0) {this.stop = true}}draw() {this.circles.forEach(circle => circle.draw())}
}class CursorSpecialEffects {constructor() {this.computerCanvas = document.createElement('canvas')this.renderCanvas = document.createElement('canvas')this.computerContext = this.computerCanvas.getContext('2d')this.renderContext = this.renderCanvas.getContext('2d')this.globalWidth = window.innerWidththis.globalHeight = window.innerHeightthis.booms = []this.running = false}handleMouseDown(e) {const boom = new Boom({origin: { x: e.clientX, y: e.clientY },context: this.computerContext,area: {width: this.globalWidth,height: this.globalHeight}})boom.init()this.booms.push(boom)this.running || this.run()}handlePageHide() {this.booms = []this.running = false}init() {const style = this.renderCanvas.stylestyle.position = 'fixed'style.top = style.left = 0style.zIndex = '999999999999999999999999999999999999999999'style.pointerEvents = 'none'style.width = this.renderCanvas.width = this.computerCanvas.width = this.globalWidthstyle.height = this.renderCanvas.height = this.computerCanvas.height = this.globalHeightdocument.body.append(this.renderCanvas)window.addEventListener('mousedown', this.handleMouseDown.bind(this))window.addEventListener('pagehide', this.handlePageHide.bind(this))}run() {this.running = trueif (this.booms.length == 0) {return this.running = false}requestAnimationFrame(this.run.bind(this))this.computerContext.clearRect(0, 0, this.globalWidth, this.globalHeight)this.renderContext.clearRect(0, 0, this.globalWidth, this.globalHeight)this.booms.forEach((boom, index) => {if (boom.stop) {return this.booms.splice(index, 1)}boom.move()boom.draw()})this.renderContext.drawImage(this.computerCanvas, 0, 0, this.globalWidth, this.globalHeight)}
}const cursorSpecialEffects = new CursorSpecialEffects()
cursorSpecialEffects.init()

鼠标特效
[点击出现文字]

/*
鼠标特效
轉自：https://www.cnblogs.com/Trojan00/p/9497509.html
*/
var a_idx = 0;
jQuery(document).ready(function($) {$("body").click(function(e) {var a = new Array("❤富强❤","❤民主❤","❤文明❤","❤和谐❤","❤自由❤","❤平等❤","❤公正❤","❤法治❤","❤爱国❤","❤敬业❤","❤诚信❤","❤友善❤");var $i = $("<span></span>").text(a[a_idx]);a_idx = (a_idx + 1) % a.length;var x = e.pageX,y = e.pageY;$i.css({"z-index": 999999999999999999999999999999999999999999999999999999999999999999999,"top": y - 20,"left": x,"position": "absolute","font-weight": "bold","color": "rgb("+~~(255*Math.random())+","+~~(255*Math.random())+","+~~(255*Math.random())+")"});$("body").append($i);$i.animate({"top": y - 180,"opacity": 0},1500,function() {$i.remove();});});
});

鼠标特效
[动态背景线条跟随鼠标移动]

/*动态背景线条跟随鼠标移动
来自：https://www.cnblogs.com/Trojan00/p/9497509.html
*/
!function(){function n(n,e,t){return n.getAttribute(e)||t} function e(n){return document.getElementsByTagName(n)}function t(){var t=e("script"),o=t.length,i=t[o-1];return{l:o,z:n(i,"zIndex",-1),o:n(i,"opacity",.5),c:n(i,"color","0,0,0"),n:n(i,"count",99)}}function o(){a=m.width=window.innerWidth||document.documentElement.clientWidth||document.body.clientWidth,c=m.height=window.innerHeight||document.documentElement.clientHeight||document.body.clientHeight}function i(){r.clearRect(0,0,a,c);var n,e,t,o,m,l;s.forEach(function(i,x){for(i.x+=i.xa,i.y+=i.ya,i.xa*=i.x>a||i.x<0?-1:1,i.ya*=i.y>c||i.y<0?-1:1,r.fillRect(i.x-.5,i.y-.5,1,1),e=x+1;e<u.length;e++)n=u[e],null!==n.x&&null!==n.y&&(o=i.x-n.x,m=i.y-n.y,l=o*o+m*m,l<n.max&&(n===y&&l>=n.max/2&&(i.x-=.03*o,i.y-=.03*m),t=(n.max-l)/n.max,r.beginPath(),r.lineWidth=t/2,r.strokeStyle="rgba("+d.c+","+(t+.2)+")",r.moveTo(i.x,i.y),r.lineTo(n.x,n.y),r.stroke()))}),x(i)}var a,c,u,m=document.createElement("canvas"),d=t(),l="c_n"+d.l,r=m.getContext("2d"),x=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(n){window.setTimeout(n,1e3/45)},w=Math.random,y={x:null,y:null,max:2e4};m.id=l,m.style.cssText="position:fixed;top:0;left:0;z-index:"+d.z+";opacity:"+d.o,e("body")[0].appendChild(m),o(),window.onresize=o,window.onmousemove=function(n){n=n||window.event,y.x=n.clientX,y.y=n.clientY},window.onmouseout=function(){y.x=null,y.y=null};for(var s=[],f=0;d.n>f;f++){var h=w()*a,g=w()*c,v=2*w()-1,p=2*w()-1;s.push({x:h,y:g,xa:v,ya:p,max:6e3})}u=s.concat([y]),setTimeout(function(){i()},100)
}();

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