Add documentation about arg passed to onchange

vitorbal · vitorbal · commit 01e59d7b4f53 · 2013-04-03T15:19:17.000+03:00
Add documentation to readme to explain that the onchange callback receives the new step element (targetElement) as an argument
diff --git a/README.md b/README.md
@@ -198,6 +198,7 @@ introJs().onexit(function() {
 ###introJs.onchange(providedCallback)
 
 Set callback to change of each step of introduction. Given callback function will be called after completing each step.
+The callback function receives the element of the new step as an argument.
 
 **Available since:** v0.3.0
 
@@ -209,8 +210,8 @@ Set callback to change of each step of introduction. Given callback function wil
 
 **Example:**
 ```javascript
-introJs().onchange(function() {
-  alert("new step");
+introJs().onchange(function(targetElement) {  
+  alert("new step: " + targetElement);
 });
 ````
 
