---

一、效果图:

二、实现思路:

particles（npm i react-particles-js）目前已被弃用；取代它的是tsparticles（npm i react-tsparticles 和npm install tsparticles）=>官网自己都不写参数的作用，离大谱
【官网地址】https://particles.js.org/和https://www.npmjs.com/package/react-tsparticles

三、实现代码:

【1】安装依赖

npm i react-tsparticles 
npm install tsparticles

【2】

import React from 'react'
//引入
import Particles from 'react-tsparticles'
import { loadFull } from "tsparticles";

import { LockOutlined, UserOutlined } from '@ant-design/icons';
import { Button, Checkbox, Form, Input, message } from 'antd';

import './Login.css'

import axios from 'axios'

//组件的最外层
const particlesInit = async (main) => {
  await loadFull(main);
};

//粒子被正确加载到画布中时，这个函数被调用
const particlesLoaded = (container) => {
  console.log("123", container);
};

export default function Login() {
  //粒子参数
  const options = {
    "background": {
      "color": {
        "value": "#232741"
      },
      "position": "50% 50%",
      "repeat": "no-repeat",
      "size": "cover"
    },
    // 帧数，越低越卡,默认60
    "fpsLimit": 120,
    "fullScreen": {
      "zIndex": 1
    },
    "interactivity": {
      "events": {
        "onClick": {
          "enable": true,
          "mode": "push"
        },
        "onHover": {
          "enable": true,
          "mode": "slow"
        }
      },
      "modes": {
        "push": {
          //点击是添加1个粒子
          "quantity": 3,
        },
        "bubble": {
          "distance": 200,
          "duration": 2,
          "opacity": 0.8,
          "size": 20,
          "divs": {
            "distance": 200,
            "duration": 0.4,
            "mix": false,
            "selectors": []
          }
        },
        "grab": {
          "distance": 400
        },
        //击退
        "repulse": {
          "divs": {
            //鼠标移动时排斥粒子的距离
            "distance": 200,
            //翻译是持续时间
            "duration": 0.4,
            "factor": 100,
            "speed": 1,
            "maxSpeed": 50,
            "easing": "ease-out-quad",
            "selectors": []
          }
        },
        //缓慢移动
        "slow": {
          //移动速度
          "factor": 2,
          //影响范围
          "radius": 200,
        },
        //吸引
        "attract": {
          "distance": 200,
          "duration": 0.4,
          "easing": "ease-out-quad",
          "factor": 3,
          "maxSpeed": 50,
          "speed": 1

        },
      }
    },
    //  粒子的参数
    "particles": {
      //粒子的颜色
      "color": {
        "value": "#ffffff"
      },
      //是否启动粒子碰撞
      "collisions": {
        "enable": true,
      },
      //粒子之间的线的参数
      "links": {
        "color": {
          "value": "#ffffff"
        },
        "distance": 150,
        "enable": true,
        "warp": true
      },
      "move": {
        "attract": {
          "rotate": {
            "x": 600,
            "y": 1200
          }
        },
        "enable": true,
        "outModes": {
          "bottom": "out",
          "left": "out",
          "right": "out",
          "top": "out"
        },
        "speed": 6,
        "warp": true
      },
      "number": {
        "density": {
          "enable": true
        },
        //初始粒子数
        "value": 40
      },
      //透明度
      "opacity": {
        "value": 0.5,
        "animation": {
          "speed": 3,
          "minimumValue": 0.1
        }
      },
      //大小
      "size": {
        "random": {
          "enable": true
        },
        "value": {
          "min": 1,
          "max": 3
        },
        "animation": {
          "speed": 20,
          "minimumValue": 0.1
        }
      }
    }
  };
  const onFinish = (values) => {
    axios.get(`/users?username=${values.username}&password=${values.password}&roleState=true&_expand=role`).then(res => {
      console.log(res.data)
      if (res.data.length === 0) {
        message.error("用户名或密码不匹配")
      } else {
        localStorage.setItem("token", JSON.stringify(res.data[0]))
        // props.history.push("/")
      }
    })
  };
  return (
    <div style={{ height: '100%', overflow: 'hidden' }}>
      <Particles id="tsparticles" init={particlesInit} loaded={particlesLoaded} options={options} />
      <Form name="normal_login" className="login-form" initialValues={{ remember: true, }} onFinish={onFinish}>
        <Form.Item>
          <h3 className="login-form-title">xxx系统</h3>
        </Form.Item>
        <Form.Item name="username" rules={[{ required: true, message: '请输入用户名!' }]}>
          <Input prefix={<UserOutlined className="site-form-item-icon" />} placeholder="请输入用户名" />
        </Form.Item>
        <Form.Item name="password" rules={[{ required: true, message: '请输入密码!' }]} >
          <Input prefix={<LockOutlined className="site-form-item-icon" />} type="password" placeholder="请输入密码" />
        </Form.Item>
        <Form.Item>
          <Form.Item name="remember" valuePropName="checked" noStyle>
            <Checkbox>记住密码</Checkbox>
          </Form.Item>
        </Form.Item>
        <Form.Item>
          <Button type="primary" htmlType="submit" className="login-form-button">登录</Button>
        </Form.Item>
      </Form>
    </div>
  )
}