Merge e4b9984 into 2055aaa

.gitignore

@@ -2,3 +2,5 @@
 .DS_Store
 node_modules
 npm-debug.log
+.nyc_output/
+coverage/

.travis.yml

@@ -4,6 +4,8 @@ node_js:
   - 8
 script:
   - npm test
+after_success:
+  - npm run coverage
 addons:
   apt:
     packages:

README.md

@@ -3,6 +3,7 @@
 [![dependencies Status](https://david-dm.org/borracciaBlu/dh-classlist/status.svg)](https://david-dm.org/borracciaBlu/dh-classlist)
 [![devDependencies Status](https://david-dm.org/borracciaBlu/dh-classlist/dev-status.svg)](https://david-dm.org/borracciaBlu/dh-classlist?type=dev)
 [![npm version](https://badge.fury.io/js/%40borracciablu%2Fdh-classlist.svg)](https://badge.fury.io/js/%40borracciablu%2Fdh-classlist)
+[![Coverage Status](https://coveralls.io/repos/github/borracciaBlu/dh-classlist/badge.svg?branch=master)](https://coveralls.io/github/borracciaBlu/dh-classlist?branch=master)
 [![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)  
 Helpers functions to manipulate the DOM element css classes.