remove unmountComponents on window unload

Author: markbrown4

README.md

@@ -129,10 +129,9 @@ The __view helper__ puts a `div` on the page with the requested component class
 ```
 
 On page load, the __`react_ujs` driver__ will scan the page and mount components using `data-react-class` 
-and `data-react-props`. Before page unload, it will unmount components (if you want to disable this behavior, 
-remove `data-react-class` attribute in `componentDidMount`).
+and `data-react-props`.
 
-`react_ujs` uses Turbolinks events if they're available, otherwise, it uses native events.
+If Turbolinks is present components are mounted on the `page:change` event, and unmounted on `page:before-unload`.
  __Turbolinks >= 2.4.0__ is recommended because it exposes better events.
 
 The view helper's signature is:

lib/assets/javascripts/react_ujs.js.erb

@@ -89,10 +89,8 @@
   function handleNativeEvents() {
     if ($) {
       $(function() {window.ReactRailsUJS.mountComponents()});
-      $(window).unload(function() {window.ReactRailsUJS.unmountComponents()});
     } else {
       document.addEventListener('DOMContentLoaded', function() {window.ReactRailsUJS.mountComponents()});
-      window.addEventListener('unload', function() {window.ReactRailsUJS.unmountComponents()});
     }
   }