Change CustomOverlayView in SearchMapWithGoogleMap:

- Adding onAdd and onRemove function to improve performance
- Rewrite current draw() method to compatible with newer react version

CHANGELOG.md

@@ -14,6 +14,11 @@ way to update this template, but currently, we follow a pattern:
 
 ## Upcoming version 2019-XX-XX
 
+## [v3.5.1] 2019-09-16
+
+- [add] add orverriding function `onAdd` and `onRemove` for `CustomOverlayView` in `SearchMapWithGoogleMap` to abide to React rules and do not `unmountComponentAtNode` when a component is rendered by React and use `appendChild` on `onAdd` instead of `draw` to [improve performance](https://github.com/tomchentw/react-google-maps/issues/817).
+- [fix] fix `CustomOverlayView` in `SearchMapWithGoogleMap` to work with new `react-intl` version, overriding `render` method to render child object by using `createPortal` instead of `unstable_renderSubtreeIntoContainer`.
+
 ## [v3.5.0] 2019-08-29
 
 - [change] Change the design of `BookingBreakdown` and add options to show only dates or booking

src/components/SearchMap/SearchMapWithGoogleMap.js

@@ -1,4 +1,6 @@
 import React, { Component } from 'react';
+import ReactDOM from 'react-dom';
+import invariant from 'invariant';
 import { arrayOf, func, node, number, oneOfType, shape, string } from 'prop-types';
 import isEqual from 'lodash/isEqual';
 import { withGoogleMap, GoogleMap, OverlayView } from 'react-google-maps';
@@ -86,12 +88,50 @@ export const isMapsLibLoaded = () =>
  * https://github.com/tomchentw/react-google-maps/issues/482
  */
 class CustomOverlayView extends OverlayView {
+
+  onRemove() {
+    this.containerElement.parentNode.removeChild(this.containerElement);
+    //Remove `unmountComponentAtNode` for react version 16
+    //I decided to keep the code here incase React decides not to give out warning when `unmountComponentAtNode` in newer version
+    if (!React.version.match(/^16/)) {
+      ReactDOM.unmountComponentAtNode(this.containerElement);
+    }
+    this.containerElement = null;
+  }
+
+  onAdd() {
+    this.containerElement = document.createElement(`div`);
+    this.containerElement.style.position = `absolute`;
+
+    const { mapPaneName } = this.props;
+    invariant(
+      !!mapPaneName,
+      `OverlayView requires either props.mapPaneName or props.defaultMapPaneName but got %s`,
+      mapPaneName
+    );
+
+    const mapPanes = this.state[OVERLAY_VIEW].getPanes();
+    mapPanes[mapPaneName].appendChild(this.containerElement);
+    this.onPositionElement();
+    this.forceUpdate();
+  }
+
+  render() {
+    if (React.version.match(/^16/) && this.containerElement) {
+      return ReactDOM.createPortal(
+        React.Children.only(this.props.children),
+        this.containerElement
+      );
+    }
+    return false;
+  }
+
   draw() {
     // https://developers.google.com/maps/documentation/javascript/3.exp/reference#MapPanes
     const mapPanes = this.state[OVERLAY_VIEW].getPanes();
     // Add conditional to ensure panes and container exist before drawing
     if (mapPanes && this.containerElement) {
-      super.draw();
+      this.onPositionElement();
     }
   }
 }