google-map-react/develop/markers/SimpleMarker.js

import React from 'react';
import compose from 'recompose/compose';
import defaultProps from 'recompose/defaultProps';
// import mapPropsOnChange from 'recompose/mapPropsOnChange';
import { Motion } from 'react-motion';
import { clusterMarkerHOC } from './ClusterMarker.js';
import simpleMarkerStyles from './SimpleMarker.sass';

export const simpleMarker = ({
  styles, hovered, $hover,
  defaultMotionStyle, motionStyle,
}) => (
  <Motion
    defaultStyle={defaultMotionStyle}
    style={motionStyle}
  >
  {
    ({ scale }) => (
      <div
        className={styles.marker}
        style={{
          transform: `translate3D(0,0,0) scale(${scale}, ${scale})`,
          zIndex: (hovered || $hover) ? 1 : 0,
        }}
      >
      </div>
    )
  }
  </Motion>
);

export const simpleMarkerHOC = compose(
  defaultProps({
    styles: simpleMarkerStyles,
    initialScale: 0.6,
    defaultScale: 0.6,
    hoveredScale: 0.7,
  }),
  // resuse HOC
  clusterMarkerHOC
);

export default simpleMarkerHOC(simpleMarker);