diff --git a/a11y-toggle.js b/a11y-toggle.js
index 5980713..dc94c04 100644
--- a/a11y-toggle.js
+++ b/a11y-toggle.js
@@ -58,10 +58,11 @@
     var toggle = event.target.hasAttribute(namespace)
       ? event.target
       : closest(event.target, '[' + namespace + ']');
-    var target = targetsMap[toggle.getAttribute(namespace)];
-    var isExpanded = toggle.getAttribute('aria-expanded') === 'true';
+    var target = toggle && targetsMap[toggle.getAttribute(namespace)];
 
     if (target) {
+      var isExpanded = toggle.getAttribute('aria-expanded') === 'true';
+
       toggle.setAttribute('aria-expanded', !isExpanded);
       target.setAttribute('aria-hidden', isExpanded);
     }
diff --git a/a11y-toggle.min.js b/a11y-toggle.min.js
index 8247104..0f1dd94 100644
--- a/a11y-toggle.min.js
+++ b/a11y-toggle.min.js
@@ -1 +1 @@
-!function(){function t(t){if(Object.keys)return Object.keys(t);var e=[];for(var r in t)t.hasOwnProperty(r)&&e.push(r);return e}function e(t,e){for(var r=t.webkitMatchesSelector?"webkitMatchesSelector":t.msMatchesSelector?"msMatchesSelector":"matches";t.parentElement;){if(t[r](e))return t;t=t.parentElement}return null}for(var r="data-a11y-toggle",a=document.querySelectorAll("["+r+"]"),i={},n=0;n<a.length;n+=1){var u=a[n],l=u.getAttribute(r);u.id||u.setAttribute("id",l+"-a11y-toggle"),u.hasAttribute("aria-expanded")||u.setAttribute("aria-expanded",!1),u.hasAttribute("aria-controls")||u.setAttribute("aria-controls",l),i["#"+l]=u.id}for(var d=t(i),s=d.length&&document.querySelectorAll(d),c={},o=0;o<s.length;o+=1){var b=s[o],h=i["#"+b.id];b.hasAttribute("aria-hidden")||b.setAttribute("aria-hidden",!0),b.hasAttribute("aria-labelledby")||h&&b.setAttribute("aria-labelledby",h),c[b.id]=b}document.addEventListener("click",function(t){var a=t.target.hasAttribute(r)?t.target:e(t.target,"["+r+"]"),i=c[a.getAttribute(r)],n="true"===a.getAttribute("aria-expanded");i&&(a.setAttribute("aria-expanded",!n),i.setAttribute("aria-hidden",n))})}();
\ No newline at end of file
+!function(){function t(t){if(Object.keys)return Object.keys(t);var e=[];for(var r in t)t.hasOwnProperty(r)&&e.push(r);return e}function e(t,e){for(var r=t.webkitMatchesSelector?"webkitMatchesSelector":t.msMatchesSelector?"msMatchesSelector":"matches";t.parentElement;){if(t[r](e))return t;t=t.parentElement}return null}for(var r="data-a11y-toggle",a=document.querySelectorAll("["+r+"]"),i={},n=0;n<a.length;n+=1){var u=a[n],l=u.getAttribute(r);u.id||u.setAttribute("id",l+"-a11y-toggle"),u.hasAttribute("aria-expanded")||u.setAttribute("aria-expanded",!1),u.hasAttribute("aria-controls")||u.setAttribute("aria-controls",l),i["#"+l]=u.id}for(var d=t(i),s=d.length&&document.querySelectorAll(d),c={},o=0;o<s.length;o+=1){var b=s[o],h=i["#"+b.id];b.hasAttribute("aria-hidden")||b.setAttribute("aria-hidden",!0),b.hasAttribute("aria-labelledby")||h&&b.setAttribute("aria-labelledby",h),c[b.id]=b}document.addEventListener("click",function(t){var a=t.target.hasAttribute(r)?t.target:e(t.target,"["+r+"]"),i=a&&c[a.getAttribute(r)];if(i){var n="true"===a.getAttribute("aria-expanded");a.setAttribute("aria-expanded",!n),i.setAttribute("aria-hidden",n)}})}();
\ No newline at end of file
diff --git a/example/main.js b/example/main.js
index 5980713..dc94c04 100644
--- a/example/main.js
+++ b/example/main.js
@@ -58,10 +58,11 @@
     var toggle = event.target.hasAttribute(namespace)
       ? event.target
       : closest(event.target, '[' + namespace + ']');
-    var target = targetsMap[toggle.getAttribute(namespace)];
-    var isExpanded = toggle.getAttribute('aria-expanded') === 'true';
+    var target = toggle && targetsMap[toggle.getAttribute(namespace)];
 
     if (target) {
+      var isExpanded = toggle.getAttribute('aria-expanded') === 'true';
+
       toggle.setAttribute('aria-expanded', !isExpanded);
       target.setAttribute('aria-hidden', isExpanded);
     }