add file

Some old users use this file, so add agin

src/directives/clickoutside.js

@@ -0,0 +1,21 @@
+export default {
+    bind (el, binding, vnode) {
+        function documentHandler (e) {
+            if (el.contains(e.target)) {
+                return false;
+            }
+            if (binding.expression) {
+                binding.value(e);
+            }
+        }
+        el.__vueClickOutside__ = documentHandler;
+        document.addEventListener('click', documentHandler);
+    },
+    update () {
+
+    },
+    unbind (el, binding) {
+        document.removeEventListener('click', el.__vueClickOutside__);
+        delete el.__vueClickOutside__;
+    }
+};