in angularjs how to access the element that triggered the event?

Question

I use both Bootstrap and AngularJS in my web app. I\'m having some difficulty getting the two to work together.

I have an element, which has the attribute data

Answer 1

There is a solution using $element in the controller if you don't want to create another directive for this problem:

appControllers.controller('YourCtrl', ['$scope', '$timeout', '$element',
        function($scope, $timeout, $element) {

    $scope.updateTypeahead = function() {
       // ... some logic here
       $timeout(function() {
           $element[0].getElementsByClassName('search-query')[0].focus();
           // if you have unique id you can use $window instead of $element:
           // $window.document.getElementById('searchText').focus();
       });
    }
}]);

And this will work with ng-change:

<input id="searchText" type="text" class="search-query" ng-change="updateTypeahead()" ng-model="searchText" />

Answer 2

The general Angular way to get access to an element that triggered an event is to write a directive and bind() to the desired event:

app.directive('myChange', function() {
  return function(scope, element) {
    element.bind('change', function() {
      alert('change on ' + element);
    });
  };
});

or with DDO (as per @tpartee's comment below):

app.directive('myChange', function() {
  return { 
    link:  function link(scope, element) {
      element.bind('change', function() {
        alert('change on ' + element);
      });
    }
  }
});

The above directive can be used as follows:

<input id="searchText" ng-model="searchText" type="text" my-change>

Plunker.

Type into the text field, then leave/blur. The change callback function will fire. Inside that callback function, you have access to element.

Some built-in directives support passing an $event object. E.g., ng-*click, ng-Mouse*. Note that ng-change does not support this event.

Although you can get the element via the $event object:

<button ng-click="clickit($event)">Hello</button>

$scope.clickit = function(e) {
    var elem = angular.element(e.srcElement);
    ...

this goes "deep against the Angular way" -- Misko.

Answer 3

I'm not sure which version you had, but this question was asked for long time ago. Currently with Angular 1.5, I can use the ng-keypress event and debounce function from Lodash to emulate similar behavior like ng-change, so I can capture the $event

<input type="text" ng-keypress="edit($event)" ng-model="myModel">

$scope.edit = _.debounce(function ($event) { console.log("$event", $event) }, 800)

Answer 4

 updateTypeahead(this)

will not pass DOM element to the function updateTypeahead(this). Here this will refer to the scope. If you want to access the DOM element use updateTypeahead($event). In the callback function you can get the DOM element by event.target.

Please Note : ng-change function doesn't allow to pass $event as variable.

Answer 5

you can get easily like this first write event on element

ng-focus="myfunction(this)"

and in your js file like below

$scope.myfunction= function (msg, $event) {
    var el = event.target
    console.log(el);
}

I have used it as well.

Answer 6

To pass the source element in Angular 5 :

<input #myInput type="text" (change)="someFunction(myInput)">