ukraine-timemap/src/components/MapSelectedEvents.jsx

import React from 'react';
import { Portal } from 'react-portal';

class MapSelectedEvents extends React.Component {

  projectPoint(location) {
    const latLng = new L.LatLng(location[0], location[1]);
    return {
      x: this.props.map.latLngToLayerPoint(latLng).x + this.props.mapTransformX,
      y: this.props.map.latLngToLayerPoint(latLng).y + this.props.mapTransformY
    };
  }

  renderMarker (event) {
    const { x, y } = this.projectPoint([event.latitude, event.longitude]);
    return (
      <g
        className="location-marker"
        transform={`translate(${x - 32}, ${y})`}
      >
        <path
          className="leaflet-interactive"
          stroke="#ffffff"
          stroke-opacity="1"
          stroke-width="3"
          stroke-linecap=""
          stroke-linejoin="round"
          stroke-dasharray="5,2"
          fill="none"
          d="M0,0a32,32 0 1,0 64,0 a32,32 0 1,0 -64,0 "
        >
        </path>
      </g>
    );
  }

  render() {
    return (
      <Portal node={this.props.svg}>
        {this.props.selected.map(s => this.renderMarker(s))}
      </Portal>
    )
  }
}
export default MapSelectedEvents;