纯css js 写出星空背景

 每次刷新星星的位置都是随机的，可以根据自己需求调整星星的数量和位置，具体代码如下，直接复制就可运行

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4     <title>Random Starry Sky</title>
 5     <style>
 6         body {
 7             margin: 0;
 8             overflow: hidden;
 9             background-color: #000;
10         }
11         .stars {
12             width: 100%;
13             height: 100%;
14             position: fixed;
15             top: -10%;
16             left: 0;
17             z-index: -1;
18         }
19         .star {
20             position: absolute;
21             background-color: white;
22             border-radius: 50%;
23         }
24     </style>
25 </head>
26 <body>
27     <div class="stars">
28         <div>你是谁</div>
29     </div>
30 
31     <script>
32         function generateStars(count) {
33             const stars = [];
34             const centerX = window.innerWidth / 2;
35             const centerY = window.innerHeight / 2;
36             const maxDistance = Math.min(centerX, centerY) * 2;
37             for (let i = 0; i < count; i++) {
38                 const angle = Math.random() * 2 * Math.PI;
39                 const distance = Math.random() * maxDistance;
40                 const x = centerX + Math.cos(angle) * distance;
41                 const y = centerY + Math.sin(angle) * distance;
42 
43                 const star = document.createElement('div');
44                 star.className = 'star';
45                 star.style.top = `${y}px`;
46                 star.style.left = `${x}px`;
47                 star.style.width = `${Math.random() * 2 + 1}px`;
48                 star.style.height = star.style.width;
49                 star.style.opacity = Math.random();
50                 stars.push(star);
51             }
52             return stars;
53         }
54         const starContainer = document.querySelector('.stars');
55         const stars = generateStars(700);
56         stars.forEach(star => starContainer.appendChild(star));
57     </script>
58 </body>
59 </html>

 

posted @ 2023-11-17 16:10  小不点灬  阅读(381)  评论(0)  编辑  收藏  举报