HTML5七夕情人节表白网页制作【星空萤火虫】HTML+CSS+JavaScript

以下是一个简单的HTML页面示例，使用HTML、CSS和JavaScript来创建一个七夕情人节表白页面，其中包含星空背景和随机飘落的萤火虫动画。




<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>七夕情人节表白</title>
<style>
  body, html {
    margin: 0;
    padding: 0;
    height: 100%;
  }
  .stars {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
  }
  .firefly {
    width: 3px;
    height: 3px;
    background: #F0DB4F;
    border-radius: 50%;
    position: absolute;
    z-index: 2;
  }
</style>
</head>
<body>
<div class="stars"></div>
<script>
  const canvas = document.createElement('canvas');
  canvas.classList.add('stars');
  document.body.appendChild(canvas);
  canvas.width = window.innerWidth;
  canvas.height = window.innerHeight;
  const ctx = canvas.getContext('2d');
  const fireflies = [];
 
  function Firefly() {
    this.x = Math.random() * canvas.width;
    this.y = Math.random() * canvas.height;
    this.size = Math.random() * 1.5;
    this.speedX = (Math.random() - 0.5) * 5;
    this.speedY = (Math.random() - 0.5) * 5;
    this.light = Math.random() * 0.9;
  }
 
  Firefly.prototype.draw = function() {
    ctx.save();
    ctx.globalAlpha = this.light;
    ctx.beginPath();
    ctx.arc(this.x, this.y, this.size, 0, 2 * Math.PI);
    ctx.fillStyle = '#F0DB4F';
    ctx.fill();
    ctx.restore();
  };
 
  Firefly.prototype.update = function() {
    this.x += this.speedX;
    this.y += this.speedY;
    if (this.x > canvas.width || this.x < 0) this.speedX *= -1;
    if (this.y > canvas.height || this.y < 0) this.speedY *= -1;
    this.draw();
  };
 
  function init() {
    canvas.addEventListener('mousemove', (e) => {
      fireflies.push(new Firefly());
      fireflies[fireflies.length - 1].x = e.clientX;
      fireflies[fireflies.length - 1].y = e.clientY;
    });
    setInterval(animate, 1000 / 60);
  }
 
  function animate() {
    ctx.fillStyle = 'rgba(0, 0, 0, 0.1)';
    ctx.fillRect(0, 0, canvas.width, canvas.height);
    fireflies.forEach((firefly) => {
      firefly.update();
    });
  }
 
  init();
</script>
</body>
</html>

这段代码创建了一个全屏的HTML页面，其中包含一个固定位置的canvas元素，用于绘制星空背景。鼠标在页面上移动时，会产生新的萤火虫，随机飘落在页面上。背景的星空和飘落的萤火虫都是通过JavaScript动态生

HTML5七夕情人节表白网页制作【星空萤火虫】HTML+CSS+JavaScript

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