Update readme

Author: rafgraph

README.md

@@ -107,6 +107,14 @@ const MyComponent = () => (
 
 ## Focus Management
 
-`react-router-hash-link` attempts to recreate the native browser focusing behavior as closely as possible. For non-interactive elements, it calls `element.focus()` followed by `element.blur()` (using a temporary `tabindex` to ensure that the element can be focused programmatically) so that focus _moves_ to the target element but does not remain on it or trigger any style changes. For interactive elements, it calls `element.focus()` and leaves focus on the target element.
+`react-router-hash-link` attempts to recreate the native browser focusing behavior as closely as possible.
 
-If you would like to leave focus on a non-interactive element - for example, to augment the navigation interaction with a visual focus indicator - you can optionally set a `tabindex` on the target element. `react-router-hash-link` will respect the `tabindex` and leave focus on the target in that case.
+The browser native behavior when clicking a hash link is:
+- If the target element is not  focusable, then focus is _moved_ to the target element, but the target element is not focused.
+- If the target element is focusable (interactive elements and elements with a `tabindex`), then the target element is focused.
+
+To recreate this `react-router-hash-link` does the following:
+- For non-focusable elements, it calls `element.focus()` followed by `element.blur()` (using a temporary `tabindex` to ensure that the element can be focused programmatically) so that focus _moves_ to the target element but does not remain on it or trigger any style changes.
+- For focusable elements, it calls `element.focus()` and leaves focus on the target element.
+
+Note that you may find it useful to leave focus on non-interactive elements (by adding a `tabindex`) to augment the navigation action with a visual focus indicator.