HTML+CSS+JavaScript实现的动态爱心，超简单直接用！_html代码草莓熊

作者：我家自动化 | 2024-05-21 15:29:57
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html代码草莓熊
创建html文件，直接复制下面的代码，不用下载其他代码源文件，打开浏览器即可实现！
有效果如果喜欢的话，记得点赞收藏哦~后面还有玫瑰花、圣诞树、草莓熊等等
可以用来简单地告白哈哈哈哈哈
动态爱心效果图
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">
    <META NAME="Author" CONTENT="">
      <META NAME="Keywords" CONTENT="">
        <META NAME="Description" CONTENT="">
          <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 Möller
   */
  (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>

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希望大家喜欢
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