imrc-datetime-picker/src/Portal.jsx

(Improved) React component datetime picker by momentjs

import { Component } from "react";
import CSSPropertyOperations from "./CSSPropertyOperations/index.js";
import ReactDOM from "react-dom";

class Portal extends Component {
  componentDidMount() {
    this.renderPortal(this.props);
  }

  componentWillReceiveProps(props) {
    this.renderPortal(props);
  }

  componentWillUnmount() {
    if (this.node) {
      ReactDOM.unmountComponentAtNode(this.node);
      document.body.removeChild(this.node);
    }

    this.portal = null;
    this.node = null;
  }

  applyClassNameAndStyle = props => {
    if (props.className) {
      this.node.className = props.className;
    }

    if (props.style) {
      CSSPropertyOperations.setValueForStyles(
        this.node,
        props.style,
        this._reactInternalInstance
      );
    }
  };

  renderPortal(props) {
    if (!this.node) {
      this.node = document.createElement("div");
      this.applyClassNameAndStyle(props);

      document.body.appendChild(this.node);
    } else {
      this.applyClassNameAndStyle(props);
    }

    const { children } = props;

    this.portal = ReactDOM.unstable_renderSubtreeIntoContainer(
      this,
      children,
      this.node
    );
  }

  render() {
    return null;
  }
}

export default Portal;