Merge pull request #271 from Ilrilan/master

Fix prependListener in wildcard mode

lib/eventemitter2.js

@@ -599,7 +599,7 @@
     return listeners;
   }
 
-  function growListenerTree(type, listener) {
+  function growListenerTree(type, listener, prepend) {
     var len = 0, j = 0, i, delimiter = this.delimiter, dl= delimiter.length, ns;
 
     if(typeof type==='string') {
@@ -648,7 +648,11 @@
             tree._listeners = [tree._listeners];
           }
 
-          tree._listeners.push(listener);
+          if (prepend) {
+            tree._listeners.unshift(listener);
+          } else {
+            tree._listeners.push(listener);
+          }
 
           if (
               !tree._listeners.warned &&
@@ -1229,7 +1233,7 @@
     }
 
     if (this.wildcard) {
-      growListenerTree.call(this, type, listener);
+      growListenerTree.call(this, type, listener, prepend);
       return returnValue;
     }
 

test/wildcardEvents/prependListener.js

@@ -0,0 +1,26 @@
+var assert= require('assert');
+
+var file = '../../lib/eventemitter2';
+var EventEmitter2;
+
+if(typeof require !== 'undefined') {
+    EventEmitter2 = require(file).EventEmitter2;
+}
+else {
+    EventEmitter2 = window.EventEmitter2;
+}
+
+module.exports= {
+    'use prepend on wildcards mode': function(){
+        var ee = new EventEmitter2({
+            wildcard: true
+        });
+        var type = ['some', 'listener', 'bar'];
+        const function1 = function () {}
+        const function2 = function () {}
+
+        ee.on(type, function2);
+        ee.prependListener(type, function1);
+        assert.deepStrictEqual(ee.listeners(type), [function1, function2])
+    }
+};