Move onbeforeunload docs to docs folder

README.md

@@ -42,22 +42,6 @@ $ npm install --save fluxible-router
 
 You can also look into this [polyfill.io polyfill service](https://cdn.polyfill.io/v1/).
 
-## onbeforeunload Support
-
-The `History` API does not allow `popstate` events to be cancelled, which results in `window.onbeforeunload()` methods not being triggered.  This is problematic for users, since application state could be lost when they navigate to a certain page without knowing the consequences.
-
-Our solution is to check for a `window.onbeforeunload()` method, prompt the user with `window.confirm()`, and then navigate to the correct route based on the confirmation.  If a route is cancelled by the user, we reset the page URL back to the original URL by using  the `History` `pushState()` method.
-
-To implement the `window.onbeforeunload()` method, you need to set it within the components that need user verification before leaving a page.  Here is an example:
-
-```javascript
-componentDidMount: function() {
-  window.onbeforeunload = function () {
-    return 'Make sure to save your changes before leaving this page!';
-  }
-}
-```
-
 ## Compatible React Versions
 
 | Compatible React Version | fluxible-router Version |

docs/api/handleHistory.md

@@ -65,3 +65,19 @@ class AppComponent extends React.Component {
 
 export default AppComponent;
 ```
+
+## onbeforeunload Support
+
+The `History` API does not allow `popstate` events to be cancelled, which results in `window.onbeforeunload()` methods not being triggered.  This is problematic for users, since application state could be lost when they navigate to a certain page without knowing the consequences.
+
+Our solution is to check for a `window.onbeforeunload()` method, prompt the user with `window.confirm()`, and then navigate to the correct route based on the confirmation.  If a route is cancelled by the user, we reset the page URL back to the original URL by using  the `History` `pushState()` method.
+
+To implement the `window.onbeforeunload()` method, you need to set it within the components that need user verification before leaving a page.  Here is an example:
+
+```javascript
+componentDidMount: function() {
+  window.onbeforeunload = function () {
+    return 'Make sure to save your changes before leaving this page!';
+  }
+}
+```