基于Particles.js实现仿知乎粒子动态背景效果

<script src="js/particles.js"></script>

<div id="particles"></div>
<style type="text/css">
 #particles {
  position: absolute;
  top: 0;
  width: 100%;
  z-index: -1; //这个z-index 要是不设置 会对登录表单的点击产生干扰，会去抢风头，不好好做一个安静的背景。
  background-color: #26AFE3;
 }
</style>

<script type="text/javascript">
// particlesJS.load('particles', './js/app/particles.json', function() {
//  console.log('callback - particles.js config loaded');
// });
particlesJS("particles", {
 "particles": {
  "number": {
   "value": 30,
   "density": {
    "enable": true,
    "value_area": 800
   }
  },
  "color": {
   "value": "#ffffff"
  },
  "shape": {
   "type": "circle",
   "stroke": {
    "width": 0,
    "color": "#000000"
   },
   "polygon": {
    "nb_sides": 5
   },
   "image": {
    "src": "img/github.svg",
    "width": 100,
    "height": 100
   }
  },
  "opacity": {
   "value": 0.5,
   "random": false,
   "anim": {
    "enable": false,
    "speed": 1,
    "opacity_min": 0.1,
    "sync": false
   }
  },
  "size": {
   "value": 10,
   "random": true,
   "anim": {
    "enable": false,
    "speed": 50,
    "size_min": 0.1,
    "sync": false
   }
  },
  "line_linked": {
   "enable": true,
   "distance": 300,
   "color": "#ffffff",
   "opacity": 0.4,
   "width": 2
  },
  "move": {
   "enable": true,
   "speed": 8,
   "direction": "none",
   "random": false,
   "straight": false,
   "out_mode": "out",
   "bounce": false,
   "attract": {
    "enable": false,
    "rotateX": 600,
    "rotateY": 1200
   }
  }
 },
 "interactivity": {
  "detect_on": "canvas",
  "events": {
   "onhover": {
    "enable": false,
    "mode": "repulse"
   },
   "onclick": {
    "enable": false,
    "mode": "push"
   },
   "resize": true
  },
  "modes": {
   "grab": {
    "distance": 800,
    "line_linked": {
     "opacity": 1
    }
   },
   "bubble": {
    "distance": 800,
    "size": 80,
    "duration": 2,
    "opacity": 0.8,
    "speed": 3
   },
   "repulse": {
    "distance": 400,
    "duration": 0.4
   },
   "push": {
    "particles_nb": 4
   },
   "remove": {
    "particles_nb": 2
   }
  }
 },
 "retina_detect": true
});
</script>