Merge pull request Serhioromano#7 from joom/master

onBeforeRemove event added

Author: Serhioromano

README.md

@@ -270,6 +270,26 @@ This event is triggered as a duplicate tag is being added. This method can retur
 
 -----------------------------------------------------
 
+###onBeforeRemove
+
+This event is triggered before a tag is removed. The function for this event should return true or false. If the function returns true then the tag is removed, however, if the function returns false then the tag will not be removed. If there is a removal request to the server, it will happen after this function returns true. By default, the tag is removed, but this event can be useful if you want to make certain tags unremovable. One parameter is passed to the callback:
+
+- `pill` - HTML element. headsup: every HTML element has `data-tag-id` attribute populated from `item.id` of the [tags feed](#feed-format) element. 
+
+**Example**
+
+    $('#bs-tags').tags({
+        onBeforeRemove: function(pill){
+            if($(pill).data('tag-id') === 'Apple') {
+                return false; // "Apple" tags are unremovable.
+            } else {
+                return true;
+            }
+        }
+    });
+
+-----------------------------------------------------
+
 ## Examples
 ### Load default values
 

js/bootstrap-tags.js

@@ -54,7 +54,10 @@
         onLoadSuggestions: function(values) {
             return values;
         },
-        onDuplicate: null
+        onDuplicate: null,
+        onBeforeRemove: function(pill) {
+            return true;
+        }
     }
 
 
@@ -291,7 +294,13 @@
 
     Tags.prototype.removeTag = function(tag) {
         var $self = this;
-        $(tag).closest('[data-tag-id]').animate({width: 0, "padding-right": 0, "padding-left": 0}, 200, 'swing', function() {
+        var $tag = $(tag).closest('[data-tag-id]');
+        
+        if($self.options.onBeforeRemove($tag) === false) {
+            return;
+        }
+
+        $tag.animate({width: 0, "padding-right": 0, "padding-left": 0}, 200, 'swing', function() {
             var $this = $(this);
             if($self.options.remove_url) {
                 $.ajax({