Update README.md

tmorehouse · web-flow · commit 706e28c214ee · 2019-09-11T05:26:18.000-03:00
diff --git a/src/directives/tooltip/README.md b/src/directives/tooltip/README.md
@@ -16,10 +16,11 @@ appear.
 
 ## Overview
 
-Things to know when using tooltips:
+Things to know when using the tooltip directive:
 
 - Tooltips rely on the 3rd party library [Popper.js](https://popper.js.org/) for positioning.
 - Tooltips require BootstrapVue's custom SCSS/CSS for transitions and color variants.
+- If a title is not provided (or is an empty string), the tooltip will not show.
 - Specify container: 'body' (the default) to avoid rendering problems in more complex components
   (like input groups, button groups, etc).
 - Triggering tooltips on hidden elements will not work.
