fixed a JS error occuring because of stale focusIndex values (#168)

* fixed a JS error occuring because of stale focusIndex values

* trial to make yarn run on travis

* use latest node version on travis

.travis.yml

@@ -1,3 +1,14 @@
 language: node_js
 node_js:
-  - "4.1"
+  - "8.1"
+before_install:
+  # Repo for newer Node.js versions
+  - curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
+  # Repo for Yarn
+  - sudo apt-key adv --keyserver pgp.mit.edu --recv D101F7899D41F3C3
+  - echo "deb http://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+  - sudo apt-get update -qq
+  - sudo apt-get install -y -qq yarn
+cache:
+  directories:
+  - $HOME/.yarn-cache

src/MentionsInput.js

@@ -550,8 +550,11 @@ class MentionsInput extends React.Component {
     // won't overwrite each other
     this.suggestions = utils.extend({}, this.suggestions, update)
 
+    const { focusIndex } = this.state
+    const suggestionsCount = utils.countSuggestions(this.suggestions);
     this.setState({
       suggestions: this.suggestions,
+      focusIndex: focusIndex >= suggestionsCount ? Math.max(suggestionsCount - 1, 0) : focusIndex,
     });
   };