在光标位置绘制粒子的Javascript将粒子发送到底部

Question

我正在尝试使用从https://github.com/tholman/90s-cursor-effects下载的javascript

它会在光标的位置上产生气泡粒子效果，但是当我在标记中添加一些或元素时，所有粒子都会被推到网页底部。

这是JavaScript的示例代码，我真的是Web开发的新手。当标签为空时，光标会真正显示粒子处于其实际位置，但是当我包括一个部分时，粒子会一直向下推到底部，然后向下滚动到底部时，达到粒子效果的距离减小，但永远不会停留在实际光标位置。

这是我的代码。

(function bubblesCursor() {

  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);
    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);
      }
    }
  }

  function onMouseMove(e) {
    cursor.x = e.clientX;
    cursor.y = e.clientY;

    addParticle(cursor.x, cursor.y);
  }

  function addParticle(x, y) {
    var particle = new Particle();
    particle.init(x, y);
    particles.push(particle);
  }

  function updateParticles() {

    // Update
    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.lifeSpan = 250; //ms
    this.initialStyles = {
      "position": "absolute",
      "display": "block",
      "pointerEvents": "none",
      "z-index": "10000000",
      "width": "5px",
      "height": "5px",
      "will-change": "transform",
      "background": "#e6f1f7",
      "box-shadow": "-1px 0px #6badd3, 0px -1px #6badd3, 1px 0px #3a92c5, 0px 1px #3a92c5",
      "border-radius": "3px",
      "overflow": "hidden"
    };

    // Init, and set properties
    this.init = function(x, y) {

      this.velocity = {
        x: (Math.random() < 0.5 ? -1 : 1) * (Math.random() / 10),
        y: (-.4 + (Math.random() * -1))
      };

      this.position = {
        x: x - 10,
        y: y - 10
      };

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

      document.body.appendChild(this.element);
    };

    this.update = function() {
      this.position.x += this.velocity.x;
      this.position.y += this.velocity.y;

      // Update velocities
      this.velocity.x += (Math.random() < 0.5 ? -1 : 1) * 2 / 75;
      this.velocity.y -= Math.random() / 600;
      this.lifeSpan--;

      this.element.style.transform = "translate3d(" + this.position.x + "px," + this.position.y + "px,0) scale(" + (0.2 + (250 - this.lifeSpan) / 250) + ")";
    }

    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();
})();

Answer 1

问题不在于脚本，而在于布局HTML元素的方式。确保将最上面的容器position设置为absolute：

<div class="parent" style="position: absolute;">
    <h1>title</h1>
    ...
    other content
    ...
</div>