Merge pull request #116 from MoOx/fix/blur

Fix element blurring (removing focus). Closes #4.

lib/util/contains.js

@@ -0,0 +1,12 @@
+module.exports = function contains(doc, selectors, el) {
+  for (var i = 0; i < selectors.length; i++) {
+    var selectedEls = doc.querySelectorAll(selectors[i])
+    for (var j = 0; j < selectedEls.length; j++) {
+      if (selectedEls[j].contains(el)) {
+        return true
+      }
+    }
+  }
+
+  return false
+}