stackoverflow愚人节彩蛋效果

效果图

代码如下
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://cdn.bootcss.com/jquery/1.9.1/jquery.min.js"></script>
</head>

<body>
    <!-- <input type="file" name="" id="file"> -->
</body>
<script>
/*!
 * Fairy Dust Cursor.js
 * - 90's cursors collection
 * -- https://github.com/tholman/90s-cursor-effects
 * -- https://codepen.io/tholman/full/jWmZxZ/
 */

 (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();
}

// Bind events that are needed
function bindEvents() {
  document.addEventListener('mousemove', onMouseMove);
  document.addEventListener('touchmove', onTouchMove);
  document.addEventListener('touchstart', onTouchMove);

  window.addEventListener('resize', onWindowResize);
}

function onWindowResize(e) {
  width = window.innerWidth;
  height = window.innerHeight;
}

function onTouchMove(e) {
  if( e.touches.length > 0 ) {
    for( var i = 0; i < e.touches.length; i++ ) {
      addParticle( e.touches[i].clientX, e.touches[i].clientY, possibleColors[Math.floor(Math.random()*possibleColors.length)]);
    }
  }
}

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() {

  // Updated
  for( var i = 0; i < particles.length; i++ ) {
    particles[i].update();
  }

  // Remove dead particles
  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();
}

/**
 * Particles
 */

function Particle() {

  this.character = "*";
  this.lifeSpan = 120; //ms
  this.initialStyles ={
    "position": "absolute",
    "display": "block",
    "pointerEvents": "none",
    "z-index": "10000000",
    "fontSize": "16px",
    "will-change": "transform"
  };

  // Init, and set properties
  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 - 20};
    this.initialStyles.color = color;

    this.element = document.createElement('span');
    this.element.innerHTML = this.character;
    applyProperties(this.element, this.initialStyles);
    this.update();

    document.querySelector('body').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);
  }

}

/**
 * Utils
 */

// Applies css properties to an element.
function applyProperties( target, properties ) {
  for( var key in properties ) {
    target.style[ key ] = properties[ key ];
  }
}

init();
})();
</script>

</html>
博客看自：https://www.cnblogs.com/CyLee/p/10636120.html
posted @ 2019-07-25 10:03 jser_dimple 阅读(255) 评论(0) 编辑收藏举报
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