如何将particles.js设置为背景

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="path/to/particles.js"></script>

<div id="particles-js"></div>

particlesJS("particles-js", {
  "particles": {
    "number": {
      "value": 80, // 粒子数量
      "density": {
        "enable": true,
        "value_area": 800 // 粒子密度
      }
    },
    "color": {
      "value": "#ffffff" // 粒子颜色
    },
    "shape": {
      "type": "circle", // 粒子形状（circle, edge, triangle, polygon, star, image）
      "stroke": {
        "width": 0,
        "color": "#000000"
      },
      "polygon": {
        "nb_sides": 5
      },
      "image": {
        "src": "path/to/your/image.png",
        "width": 100,
        "height": 100
      }
    },
    "opacity": {
      "value": 0.5,
      "random": false,
      "anim": {
        "enable": false,
        "speed": 1,
        "opacity_min": 0.1,
        "sync": false
      }
    },
    "size": {
      "value": 3, // 粒子大小
      "random": true,
      "anim": {
        "enable": false,
        "speed": 40,
        "size_min": 0.1,
        "sync": false
      }
    },
    "line_linked": {
      "enable": true,
      "distance": 150, // 粒子链接线距离
      "color": "#ffffff",
      "opacity": 0.4,
      "width": 1
    },
    "move": {
      "enable": true,
      "speed": 6, // 粒子移动速度
      "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": true, // 鼠标悬停时是否产生交互
        "mode": "repulse"
      },
      "onclick": {
        "enable": true, // 鼠标点击时是否产生交互
        "mode": "push"
      },
      "resize": true
    },
    "modes": {
      "grab": {
        "distance": 400,
        "line_linked": {
          "opacity": 1
        }
      },
      "bubble": {
        "distance": 400,
        "size": 40,
        "duration": 2,
        "opacity": 8,
        "speed": 3
      },
      "repulse": {
        "distance": 200 // 粒子被鼠标推开的距离
      },
      "push": {
        "particles_nb": 4 // 每次点击添加的粒子数量
      },
      "remove": {
        "particles_nb": 2 // 每次点击移除的粒子数量
      }
    }
  },
  "retina_detect": true
});