src/react/Portal.js


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import React from 'react';
import PropTypes from 'prop-types';
import ReactDOM from 'react-dom';

class Portal extends React.Component {        
	componentDidMount() {
		this.renderPortal();
	}
    
	componentDidUpdate() {
		this.renderPortal();
	}
    
	componentWillUnmount() {
		if (this.defaultNode) {
			document.body.removeChild(this.defaultNode);
		}
		this.defaultNode = null;
		this.portal = null;
	}
     
	renderPortal() {
		if (!this.defaultNode) {
			this.defaultNode = document.createElement('div');
			this.defaultNode.className = 'onap-sdc-portal';
			document.body.appendChild(this.defaultNode);
		}
    
		let children = this.props.children;        
		if (typeof this.props.children.type === 'function') {
			children = React.cloneElement(this.props.children);
		}
        /**
         * Change this to ReactDOM.CreatePortal after upgrading to React 16
         */
		this.portal = ReactDOM.unstable_renderSubtreeIntoContainer(
          this,
          children,
          this.defaultNode
        );
	}
	render() {
		return null;
	}
        
}

Portal.propTypes = {
	children: PropTypes.node.isRequired
};

export default Portal;