propagate - npm Package Compare versions

Comparing version 0.1.1 to 0.2.0

index.js

@@ -1,6 +0,17 @@
-function propagate(source, dest) {
+function propagate(events, source, dest) {
+  if (arguments.length < 3) {
+    dest = source;
+    source = events;
+    events = undefined;
+  }
+
+  // events should be an array
+  if (events && ! Array.isArray(events)) events = [events];
+
   var oldEmit =  source.emit;
 
-  source.emit = function() {
-    dest.emit.apply(dest, arguments);
+  source.emit = function(eventType) {
+    if (! events || ~events.indexOf(eventType)) {
+      dest.emit.apply(dest, arguments);
+    }
     oldEmit.apply(source, arguments);
@@ -7,0 +18,0 @@ }

package.json

 {
   "name": "propagate",
   "description": "Propagate events",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "author" : "Pedro Teixeira <[e-mail]>",
@@ -6,0 +6,0 @@ "contributors" : [

README.md

@@ -11,3 +11,3 @@ # propagate
 
-## User
+## Propagate
 
@@ -39,1 +39,9 @@ ```javascript
 ```
+
+## Just propagate some events:
+
+```javascript
+  var ee1 = new EventEmitter();
+  var ee2 = new EventEmitter();
+  var p = propagate(['event1', event2'], ee1, ee2);
+```

tests/index.js

@@ -60,2 +60,26 @@ var test = require('tap').test;
   ee1.emit('event');
+});
+
+test('is able to propagate only certain events', function(t) {
+  t.plan(2);
+  var ee1 = new EventEmitter();
+  var ee2 = new EventEmitter();
+  // propagate only event-1 and event-2, leaving out
+  propagate(['event-1', 'event-2'], ee1, ee2);
+
+  ee2.on('event-1', function() {
+    t.ok(true, 'event 1 received');
+  });
+
+  ee2.on('event-2', function(a, b, c) {
+    t.ok(true, 'event 2 received');
+  });
+
+  ee2.on('event-3', function(a, b, c) {
+    t.ok(false, 'event 3 should not have been received');
+  });
+
+  ee1.emit('event-1');
+  ee1.emit('event-2');
+  ee1.emit('event-3');
 });

No alert changes

Improved metrics

Total package byte prevSize

3708

37.79%

Lines of code

87

47.46%

Number of lines in readme file

46

21.05%

No dependency changes