# Applying angular $watch on filter\_bar not working

**URL:** <https://discuss.elastic.co/t/applying-angular-watch-on-filter-bar-not-working/72453>\
**Category:** Kibana\
**Created:** [January 23, 2017, 9:17am UTC](https://discuss.elastic.co/t/applying-angular-watch-on-filter-bar-not-working/72453 "2017-01-23T09:17:18Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![tarun\_kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tarun_kumar/32/65948_2.png) [@tarun\_kumar](https://discuss.elastic.co/u/tarun_kumar)\
**Post date:** [January 23, 2017, 9:17am UTC](https://discuss.elastic.co/t/applying-angular-watch-on-filter-bar-not-working/72453/1 "2017-01-23T09:17:19Z")

</div>

I have got kibana filter\_bar as below:  
var queryFilter = Private(require('ui/filter\_bar/query\_filter'));  
Now,  
I wish to watch changes in queryFilter , but unexpectedly below watcher isn't working :-

> var filterBar=queryFilter.getFilters();  
> $scope.$watch('filterBar', function(oldValue,newValue)  
> {  
> alert('filterBar changed');

> console.log(oldValue); // resp getting undefined  
> console.log(newValue);  
> console.log(filterBar);  
> },true);

Watcher doesn't invoke even on filterBar gets updated on new filter being added , even though i have been using onjectEquality set true. Please help me on this ?

---

<div class="post-metadata">

**Author:** ![tarun\_kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tarun_kumar/32/65948_2.png) [@tarun\_kumar](https://discuss.elastic.co/u/tarun_kumar)\
**Post date:** [January 23, 2017, 10:40am UTC](https://discuss.elastic.co/t/applying-angular-watch-on-filter-bar-not-working/72453/2 "2017-01-23T10:40:24Z")

</div>

Oh, here I got the solution ,

```javascript
var queryFilter = Private(require('ui/filter_bar/query_filter'));
$scope.$listen(queryFilter, 'update', function () {
  alert("query Updated");
});

```

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 20, 2017, 10:40am UTC](https://discuss.elastic.co/t/applying-angular-watch-on-filter-bar-not-working/72453/3 "2017-02-20T10:40:50Z")

</div>

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