react封装全局弹框的方法

import React, { Component } from 'react'
import { is, fromJS } from 'immutable'
import ReactDOM from 'react-dom'
import './alert.less'

const close = require('../images/guanbi.png')
const line = require('../images/line.png')

const defaultState = {
  alertStatus: false,
  alertTip: null,
  alertTitle: '详情',
  closeAlert: () => {}
}

class Toptips extends Component {
  state = {
    ...defaultState
  }

  // CSS动画组件设置为目标组件
  FirstChild = props => {
    const childrenArray = React.Children.toArray(props.children)
    return childrenArray[0] || null
  }

  // 关闭弹框
  confirm = () => {
    const that = this
    console.log(that)
    this.setState(
      {
        alertStatus: false
      },
      () => {
        that.state.closeAlert()
      }
    )
  }

  open = data => {
    const options = data || {}
    options.alertStatus = true
    this.setState({
      ...defaultState,
      ...options
    })
  }

  close = () => {
    const that = this
    that.state.closeAlert()
    this.setState({
      ...defaultState
    })
  }

  shouldComponentUpdate = (nextProps, nextState) => {
    return (
      !is(fromJS(this.props), fromJS(nextProps)) ||
      !is(fromJS(this.state), fromJS(nextState))
    )
  }

  render() {
    const { alertStatus, alertTip, alertTitle } = this.state
    console.log(alertTip, alertTitle)
    return (
        <div
          className="alert-con"
          style={alertStatus ? { display: 'block' } : { display: 'none' }}
        >
          <div className="alert-context">
            <div className="alert-content-title">{alertTitle}</div>
            <img className="alert-content-line" src={line} alt="line" />
            <div className="alert-content-detail">{alertTip}</div>
            <img
              role="presentation"
              onClick={() => {
                this.confirm()
              }}
              className="alert-close"
              src={close}
              alt="关闭"
            />
          </div>
        </div>
    )
  }
}

const div = document.createElement('div')
const props = {}
document.body.appendChild(div)

const Box = ReactDOM.render(React.createElement(Toptips, props), div)

export default Box

.alert-con {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.3);
  z-index: 222;
}
.alert-context {
  // background-color: #fff;
  // border-radius: 16px;
  position: relative;
  // height: 500px;
  height: 90%;
  width: 750px;
  margin: 40px auto 0;
  background: url(../images/alertBJ.png) no-repeat center;
  background-size: 100% 100%;
  .alert-close{
    width: 30px;
    height: 30px;
    position: absolute;
    right: 30px;
    top: 30px;
  }
  .alert-content-title{
    width: 100%;
    height: 80px;
    line-height: 80px;
    color: #fff;
    text-align: center;
    font-size: 36px;
    font-weight: bolder;
    // background: url(../images/line.png) no-repeat left bottom;
  }
  .alert-content-line{
    width: 100%;
    height: 20px;
    margin-top: -44px;
    margin-left: -6px;
  }
  .alert-detais-list{
    width: 102%;
    height: 100%;
    overflow-y: auto;
    padding: 20px 60px;
    .alert-detais-list-C{
      p{
        &:nth-child(1){
          font-size: 14px;
          line-height: 20px;
          color: #FFFFFF;
          letter-spacing: 1.4px;
        }
        &:nth-child(2){
          line-height: 24px;
          font-size: 18px;
          color: #FFFFFF;
        }
      }
    }
  }
  .alert-content-detail{
    // height: 100%;
    height: calc(100% - 100px);
    
    overflow: hidden;
    width: 98%;
    margin-top: -26px;
  }
  .alert-details-pdf{
    width: 102%;
    height: 100%;
    overflow-y: auto;
    padding: 20px 60px;
    .alert-details-button{
      display: flex;
      flex-direction: row;
      justify-content: flex-end;
      margin-bottom: 10px;
      p{
        color:#fff;
        line-height: 35px;
        font-size: 16px;
        margin-right: 20px;
      }
      a{
        line-height: 35px;
        font-size: 16px;
        margin-right: 20px;
      }
    }
  }
.cameraWrap{
  width: 100%;
  height: 102%;
  box-sizing: border-box;
  padding: 12px 4px 0 14px;
}
}

import Toptips from "./Toptips"
Toptips.open({
      alertTitle: '批示详情',
      alertTip: that.htms(val),
      closeAlert: function () {
        console.log("关闭了...");
      }
    });
  htms = val => {
    return (<div className="alert-detais-list">
      <div className="alert-detais-list-C">
        <p>批示内容：</p>
        <p>{val.fdTitle}</p>
      </div>
      <div className="alert-detais-list-C">
        <p>批示详述：</p>
        <p>{val.fdTitle}</p>
      </div>
      <div className="alert-detais-list-C">
        <p>措施及结果：</p>
        <p>{val.fdContent}</p>
      </div>
      <div className="alert-detais-list-C">
        <p>进度详情：</p>
        <p></p>
      </div>
    </div>)
  }