react封装Dialog弹框的方法

import React, { Component, Children } from "react";
import { createPortal } from "react-dom";
import "../static/css/Dialog.scss"
export default class Dialog extends Component {
  constructor(props) {
    super(props);
    const doc = window.document;
    this.node = doc.createElement("div");
    doc.body.appendChild(this.node);
  }
  componentWillUnmount() {
    window.document.body.removeChild(this.node);
  }
  render() {
    const { children, hideDialog, hide } = this.props;
    let tem = hide ? "hidden" : "";
    console.log("hide", tem);
    return createPortal(
      <div className="dialogBox" style={{ visibility: tem }}>
        <div className="dialog">
          {children}
          <button onClick={hideDialog}>close</button>
        </div>
      </div>,
      this.node
    );
  }
}

.dialogBox {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  width: 100%;
  height: 100%;
  background: rgba($color: #000000, $alpha: 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  .dialog{
  width: 50%;
  height: 50%;
  text-align: center;;
  background-color: #fff;
  }
}

import React, { Component } from "react";
import { Button } from "antd";
import Dialog from "../components/Dialog";

export default class DialogPage extends Component {
  constructor(props) {
    super(props);
    this.state = {
      showDialog: false,
    };
  }
  handleShowDialog = () => {
    this.setState({
      showDialog: !this.state.showDialog,
    });
  };
  render() {
    const { showDialog } = this.state;
    return (
      <div className="dialogPage">
        <h1>DialogPage</h1>
        <Button onClick={this.handleShowDialog}>切换</Button>
        {showDialog && (
          <Dialog hideDialog={this.handleShowDialog} hide={false}>
            <h3></h3>
            <p>这是一个弹窗</p>
          </Dialog>
        )}
      </div>
    );
  }
}