Check if other bindings exist before trying to attach

dist/js/bootstrap-multiselect.js

@@ -19,51 +19,57 @@
 
                 $element.multiselect(config);
 
-                var options = allBindings.get('options');
-                if (ko.isObservable(options)) {
-                    ko.computed({
-                        read: function() {
-                            options();
-                            setTimeout(function() {
-                                var ms = $element.data('multiselect');
-                                if (ms)
-                                    ms.updateOriginalOptions();//Not sure how beneficial this is.
-                                $element.multiselect('rebuild');
-                            }, 1);
-                        },
-                        disposeWhenNodeIsRemoved: element
-                    });
+                if (allBindings.has('options')) {
+                    var options = allBindings.get('options');
+                    if (ko.isObservable(options)) {
+                        ko.computed({
+                            read: function() {
+                                options();
+                                setTimeout(function() {
+                                    var ms = $element.data('multiselect');
+                                    if (ms)
+                                        ms.updateOriginalOptions();//Not sure how beneficial this is.
+                                    $element.multiselect('rebuild');
+                                }, 1);
+                            },
+                            disposeWhenNodeIsRemoved: element
+                        });
+                    }
                 }
 
                 //value and selectedOptions are two-way, so these will be triggered even by our own actions.
                 //It needs some way to tell if they are triggered because of us or because of outside change.
                 //It doesn't loop but it's a waste of processing.
-                var value = allBindings.get('value');
-                if (ko.isObservable(value)) {
-                    ko.computed({
-                        read: function() {
-                            value();
-                            setTimeout(function() {
-                                $element.multiselect('refresh');
-                            }, 1);
-                        },
-                        disposeWhenNodeIsRemoved: element
-                    }).extend({ rateLimit: 100, notifyWhenChangesStop: true });
+                if (allBindings.has('value')) {
+                    var value = allBindings.get('value');
+                    if (ko.isObservable(value)) {
+                        ko.computed({
+                            read: function() {
+                                value();
+                                setTimeout(function() {
+                                    $element.multiselect('refresh');
+                                }, 1);
+                            },
+                            disposeWhenNodeIsRemoved: element
+                        }).extend({ rateLimit: 100, notifyWhenChangesStop: true });
+                    }
                 }
 
                 //Switched from arrayChange subscription to general subscription using 'refresh'.
                 //Not sure performance is any better using 'select' and 'deselect'.
-                var selectedOptions = allBindings.get('selectedOptions');
-                if (ko.isObservable(selectedOptions)) {
-                    ko.computed({
-                        read: function() {
-                            selectedOptions();
-                            setTimeout(function() {
-                                $element.multiselect('refresh');
-                            }, 1);
-                        },
-                        disposeWhenNodeIsRemoved: element
-                    }).extend({ rateLimit: 100, notifyWhenChangesStop: true });
+                if (allBindings.has('selectedOptions')) {
+                    var selectedOptions = allBindings.get('selectedOptions');
+                    if (ko.isObservable(selectedOptions)) {
+                        ko.computed({
+                            read: function() {
+                                selectedOptions();
+                                setTimeout(function() {
+                                    $element.multiselect('refresh');
+                                }, 1);
+                            },
+                            disposeWhenNodeIsRemoved: element
+                        }).extend({ rateLimit: 100, notifyWhenChangesStop: true });
+                    }
                 }
 
                 ko.utils.domNodeDisposal.addDisposeCallback(element, function() {