ng-repeat finish event

By : ChruS
Source: Stackoverflow.com
Question!

I want to call some jQuery function targeting div with table. That table is populated with ng-repeat.

When I call it on

$(document).ready()

I have no result.

Also

$scope.$on('$viewContentLoaded', myFunc);

doesn't help.

Is there any way to execute function right after ng-repeat population completes? I've read an advice about using custom directive, but I have no clue how to use it with ng-repeat and my div...

By : ChruS


Answers
Indeed, you should use directives, and there is no event tied to the end of a ng-Repeat loop (as each element is constructed individually, and has it's own event). But a) using directives might be all you need and b) there are a few ng-Repeat specific properties you can use to make your "on ngRepeat finished" event.

Specifically, if all you want is to style/add events to the whole of the table, you can do so using in a directive that encompasses all the ngRepeat elements. On the other hand, if you want to address each element specifically, you can use a directive within the ngRepeat, and it will act on each element, after it is created.

Then, there are the $index, $first, $middle and $last properties you can use to trigger events. So for this HTML:

<div ng-controller="Ctrl" my-main-directive>
  <div ng-repeat="thing in things" my-repeat-directive>
    thing {{thing}}
  </div>
</div>

You can use directives like so:

angular.module('myApp', [])
.directive('myRepeatDirective', function() {
  return function(scope, element, attrs) {
    angular.element(element).css('color','blue');
    if (scope.$last){
      window.alert("im the last!");
    }
  };
})
.directive('myMainDirective', function() {
  return function(scope, element, attrs) {
    angular.element(element).css('border','5px solid red');
  };
});

See it in action in this Plunker. Hope it helps!



If you simply want to execute some code at the end of the loop, here's a slightly simpler variation that doesn't require extra event handling:

<div ng-controller="Ctrl">
  <div class="thing" ng-repeat="thing in things" my-post-repeat-directive>
    thing {{thing}}
  </div>
</div>
function Ctrl($scope) {
  $scope.things = [
    'A', 'B', 'C'  
  ];
}

angular.module('myApp', [])
.directive('myPostRepeatDirective', function() {
  return function(scope, element, attrs) {
    if (scope.$last){
      // iteration is complete, do whatever post-processing
      // is necessary
      element.parent().css('border', '1px solid black');
    }
  };
});

See a live demo.

By : karlgold


Here is a repeat-done directive that calls a specified function when true. I have found that the called function must use $timeout with interval=0 before doing DOM manipulation, such as initializing tooltips on the rendered elements. jsFiddle: http://jsfiddle.net/tQw6w/

In $scope.layoutDone, try commenting out the $timeout line and uncommenting the "NOT CORRECT!" line to see the difference in the tooltips.

<ul>
    <li ng-repeat="feed in feedList" repeat-done="layoutDone()" ng-cloak>
    <a href="{{feed}}" title="view at {{feed | hostName}}" data-toggle="tooltip">{{feed | strip_http}}</a>
    </li>
</ul>

JS:

angular.module('Repeat_Demo', [])

    .directive('repeatDone', function() {
        return function(scope, element, attrs) {
            if (scope.$last) { // all are rendered
                scope.$eval(attrs.repeatDone);
            }
        }
    })

    .filter('strip_http', function() {
        return function(str) {
            var http = "http://";
            return (str.indexOf(http) == 0) ? str.substr(http.length) : str;
        }
    })

    .filter('hostName', function() {
        return function(str) {
            var urlParser = document.createElement('a');
            urlParser.href = str;
            return urlParser.hostname;
        }
    })

    .controller('AppCtrl', function($scope, $timeout) {

        $scope.feedList = [
            'http://feeds.feedburner.com/TEDTalks_video',
            'http://feeds.nationalgeographic.com/ng/photography/photo-of-the-day/',
            'http://sfbay.craigslist.org/eng/index.rss',
            'http://www.slate.com/blogs/trending.fulltext.all.10.rss',
            'http://feeds.current.com/homepage/en_US.rss',
            'http://feeds.current.com/items/popular.rss',
            'http://www.nytimes.com/services/xml/rss/nyt/HomePage.xml'
        ];

        $scope.layoutDone = function() {
            //$('a[data-toggle="tooltip"]').tooltip(); // NOT CORRECT!
            $timeout(function() { $('a[data-toggle="tooltip"]').tooltip(); }, 0); // wait...
        }

    })


This video can help you solving your question :)
By: admin