AngularJS Advance Course > Events

How to Perform Event Emit Example in AngularJS

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$emit() is a function that allows you to send out a message. The $emit method in AngularJS is used to dispatch an event name upwards and up to the $rootScope scope listeners. The $emit propagates the event name upwards and calls all registered listeners along the way. scope listeners and calls all registered listeners along the way.

$emit() is a function that allows you to send out a message. The $emit method in AngularJS is used to dispatch an event name upwards and up to the $rootScope scope listeners. The $emit propagates the event name upwards, towards $rootScope.

The directive uses $rootScope and $emit() to announce interval events. To listen for certain events, use $on(). The directive is unable to make advantage of scope. Because the emitted event never passes across the scope tree, $on() is used in this situation.

Without injecting $scope or $rootScope into the controller, it's impossible to register a $emit or $broadcast event. Using $scope variables and functions is bad practise because the controller instance is already injected into the $scope via the controllerAs syntax.

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Course Content

  1. What is AngularJS
    4m 35s
  2. How to use LearnVern
    3m 20s
  3. How to implement AngularJS
    9m 35s

  1. What is Scope Data-Binding and expression in AngularJS
    7m 37s
  2. How to use Scope,Data-Binding & expression with Example
    8m 56s

  1. What is Directive and types of Directives in AngularJS
    8m 41s
  2. How to work with Pre-defined Directive
    7m 5s
  3. How to work with Custom Directives
    7m 42s
  4. How to Perform Custom Directive as a Attribute, Class and Comment
    4m 9s
  5. Assignment of Directive
    1m 32s

  1. What is Controller and How to use in AngularJS
    5m 39s
  2. How to use controllers
    5m 39s
  3. How to use controllers child and parent
    13m 57s
  4. Assignment of Controller
    55s

  1. What is Event in AngularJS
    4m 20s
  2. Describe Events
    12m 23s
  3. How to Perform Event Emit Example in AngularJS
    14m 24s
  4. Assignment of Events
    49s
  5. How to Perform Event Broadcast Example in AngularJS
    8m 58s

  1. What is Routing in AngularJS
    9m 57s
  2. How to perform basic routing
    12m 3s
  3. How to use template URL in basic routing
    10m 27s
  4. Assignment of Routing
    5m 1s

  1. What is Service in AngularJS
    5m 57s
  2. Inbuilt services($timeout & $interval)
    12m 40s
  3. Inbuilt services($log service)
    12m 27s
  4. How to use factory services
    5m 53s
  5. How to use http service
    12m 24s
  6. How to use value and constant service
    10m 18s
  7. Assignment of Services
    2m 20s

  1. What are the Filters in AngularJS
    10m 53s
  2. How to use Inbuilt Filters
    10m 2s
  3. How to Create Custom Filters
    12m 42s
  4. Assignment of Fliter
    2m 27s

  1. What is Validation
    15m 33s
  2. How to use $touched and $untouched states
    13m 47s
  3. How to use $valid , $dirty and $pristine validation
    14m 38s
  4. How to perform validation through the class
    52m 8s
  5. How to perform validation through the directives
    3m 23s
  6. Assignment of Validation
    1m 20s
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