两种过年烟花,你喜欢哪一种(HTML+CSS+JS)

🎇两种过年烟花,你喜欢哪一种🎇(HTML+CSS+JS) 

目录

🎇两种过年烟花,你喜欢哪一种🎇(HTML+CSS+JS) 

效果一

效果二


效果一

 

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>HTML5炫酷喜庆全屏烟花动画特效</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 dimensions
		cw = window.innerWidth,
		ch = window.innerHeight,
		// firework collection
		fireworks = [],
		// particle collection
		particles = [],
		// starting hue
		hue = 120,
		// when launching fireworks with a click, too many get launched at once without a limiter, one launch per 5 loop ticks
		limiterTotal = 5,
		limiterTick = 0,
		// this will time the auto launches of fireworks, one launch per 80 loop ticks
		timerTotal = 80,
		timerTick = 0,
		mousedown = false,
		// mouse x coordinate,
		mx,
		// mouse y coordinate
		my;
		
// 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 coordinates
	this.x = sx;
	this.y = sy;
	// starting coordinates
	this.sx = sx;
	this.sy = sy;
	// target coordinates
	this.tx = tx;
	this.ty = ty;
	// distance from starting point to target
	this.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 trails
	this.coordinates = [];
	this.coordinateCount = 3;
	// populate initial coordinate collection with the current coordinates
	while( 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 radius
	this.targetRadius = 1;
}

// update firework
Firework.prototype.update = function( index ) {
	// remove last item in coordinates array
	this.coordinates.pop();
	// add current coordinates to the start of the array
	this.coordinates.unshift( [ this.x, this.y ] );
	
	// cycle the circle target indicator radius
	if( this.targetRadius < 8 ) {
		this.targetRadius += 0.3;
	} else {
		this.targetRadius = 1;
	}
	
	// speed up the firework
	this.speed *= this.acceleration;
	
	// get the current velocities based on angle and speed
	var 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 reached
	if( this.distanceTraveled >= this.distanceToTarget ) {
		createParticles( this.tx, this.ty );
		// remove the firework, use the index passed into the update function to determine which to remove
		fireworks.splice( index, 1 );
	} else {
		// target not reached, keep traveling
		this.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 y
	ctx.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 circle
	ctx.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 trails
	this.coordinates = [];
	this.coordinateCount = 5;
	while( this.coordinateCount-- ) {
		this.coordinates.push( [ this.x, this.y ] );
	}
	// set a random angle in all possible directions, in radians
	this.angle = random( 0, Math.PI * 2 );
	this.speed = random( 1, 10 );
	// friction will slow the particle down
	this.friction = 0.95;
	// gravity will be applied and pull the particle down
	this.gravity = 1;
	// set the hue to a random number +-20 of the overall hue variable
	this.hue = random( hue - 20, hue + 20 );
	this.brightness = random( 50, 80 );
	this.alpha = 1;
	// set how fast the particle fades out
	this.decay = random( 0.015, 0.03 );
}

// update particle
Particle.prototype.update = function( index ) {
	// remove last item in coordinates array
	this.coordinates.pop();
	// add current coordinates to the start of the array
	this.coordinates.unshift( [ this.x, this.y ] );
	// slow down the particle
	this.speed *= this.friction;
	// apply velocity
	this.x += Math.cos( this.angle ) * this.speed;
	this.y += Math.sin( this.angle ) * this.speed + this.gravity;
	// fade out the particle
	this.alpha -= this.decay;
	
	// remove the particle once the alpha is low enough, based on the passed in index
	if( 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 y
	ctx.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 though
	var particleCount = 30;
	while( particleCount-- ) {
		particles.push( new Particle( x, y ) );
	}
}

// main demo loop
function loop() {
	// this function will run endlessly with requestAnimationFrame
	requestAnimFrame( loop );
	
	// increase the hue to get different colored fireworks over time
	hue += 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 entirely
	ctx.globalCompositeOperation = 'destination-out';
	// decrease the alpha property to create more prominent trails
	ctx.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 other
	ctx.globalCompositeOperation = 'lighter';
	
    var text = "红木香薰,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 it
	var i = fireworks.length;
	while( i-- ) {
		fireworks[ i ].draw();
		fireworks[ i ].update( i );
	}
	
	// loop over each particle, draw it, update it
	var i = particles.length;
	while( i-- ) {
		particles[ i ].draw();
		particles[ i ].update( i );
	}
	
	// launch fireworks automatically to random coordinates, when the mouse isn't down
	if( 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 screen
      
      for(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 down
	if( limiterTick >= limiterTotal ) {
		if( mousedown ) {
			// start the firework at the bottom middle of the screen, then set the current mouse coordinates as the target
			fireworks.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

 

  <div id="tips">
    <a id="manual" href="javascript:;">手动放烟花</a>
    <a id="auto" href="javascript:;">自动放烟花</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) { //产生范围在lower~upper的随机数
      return Math.floor(Math.random() * (upper - lower + 1) + lower)
    },
    getRanColor: function () { //随机获得十六进制颜色
      var str = this.randomRange(0, 0xFFFFFF).toString(16);
      while (str.length < 6) str = "0" + str;
      return "#" + str
    }
  };
  //初始化对象
  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即鼠标点击点(即烟花爆炸点)
      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) { //烟花上升过程实体初始化
        position = "absolute";
        //初始位置距网页顶部为:整个网页的高度(处于网页底部)
        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 该方法使得一个函数每隔固定时间被调用一次
      //                console.log(param.y);
      oEntity.timer = setInterval(function () {
        //                    console.log(oEntity.offsetTop);
        //                    console.log(oEntity.style.top);
        oEntity.style.top = oEntity.offsetTop - 20 + "px";
        //判断烟花是否上升到或者第一次超过上次鼠标点击位置
        if (oEntity.offsetTop <= param.y) {
          //烟花爆炸
          clearInterval(oEntity.timer);
          document.body.removeChild(oEntity);
          (function () {
            //在50-100之间随机生成碎片
            //由于IE浏览器处理效率低, 随机范围缩小至20-30
            //自动放烟花时, 随机范围缩小至20-30
            var len = (/msie/i.test(navigator.userAgent) || that.type == 2) ? fgm.randomRange(20, 30) : fgm.randomRange(50, 100)
            //产生所有烟花爆炸颗粒实体
            for (i = 0; i < len; i++) {
              //烟花颗粒形态实体
              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++;
                //判断烟花爆炸颗粒是否掉落至窗体之外,为真则remove
                //splice() 方法可删除从 index 处开始的零个或多个元素
                (obj.offsetTop < 0 || obj.offsetLeft < 0 || obj.offsetTop > document.documentElement.clientHeight || obj.offsetLeft > document.documentElement.clientWidth) && (document.body.removeChild(obj), aChip.splice(i, 1))
              };
              //判断烟花爆炸颗粒是否全部remove,为真则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";
        //阻止浏览器默认的事件冒泡行为
        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>

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