Executing an external function on an element as soon as it is created in AngularJS: tips and tricks

Question

Executing an external function on an element as soon as it is created in AngularJS: tips and tricks

I am looking to implement a function from an external library that will be executed on each item as it is created in AngularJS. How can I achieve this? Here is the code snippet of my application.

var app = angular.module('app', []);

app.controller('MainCtrl', function($scope) {
  $scope.blocks = [
    {name: 'item #1'},
    {name: 'item #2'}
  ];
});

<script src="https://code.angularjs.org/1.4.0-rc.2/angular.js"></script>
<script>
  // This function is part of an external library
  // I want to apply it to each block in ng-repeat
  // It manipulates the DOM
  function setupBlock(elm, name) {
    elm.innerHTML = name + ' [ready]';
  }
</script>

<body ng-controller="MainCtrl" ng-app="app">
  <div ng-repeat="block in blocks">{{block.name}}</div>
</body>

javascript angularjs

Answer 1

Answer №1

Invent a custom instruction that requires an input called name:

.directive('myDirective', function() {
  return {
    restrict: 'A',
    scope: {
      name: '='
    },
    link: function(scope, elm, attrs) {
      // Insert your code here!
      elm[0].innerHTML = scope.name;
    }
  }
})

View a comprehensive example here: http://plnkr.co/edit/3SOWZrRHOldMRUEl7l0Z

Reminder: For any DOM modifications, make sure to utilize directives!

MODIFY: If you want to pass the entire object to the directive, update the scope declaration like this:

scope: {
  block: '=data'
}

Then, in your ng-repeat markup:

<div ng-repeat="block in blocks" my-directive data="block"></div>

Answer 2

Invent a custom instruction that requires an input called name:

.directive('myDirective', function() {
  return {
    restrict: 'A',
    scope: {
      name: '='
    },
    link: function(scope, elm, attrs) {
      // Insert your code here!
      elm[0].innerHTML = scope.name;
    }
  }
})

View a comprehensive example here: http://plnkr.co/edit/3SOWZrRHOldMRUEl7l0Z

Reminder: For any DOM modifications, make sure to utilize directives!

MODIFY: If you want to pass the entire object to the directive, update the scope declaration like this:

scope: {
  block: '=data'
}

Then, in your ng-repeat markup:

<div ng-repeat="block in blocks" my-directive data="block"></div>

Answer 3

Answer №2

Utilize the $rootScope object in AngularJS

[1]: https://docs.angularjs.org/api/ng/service/$rootScope "

[2]: "

For instance, in JavaScript:

(function() {
  var global;

  global = (function() {
    function global($rootScope) {
      $rootScope.view_directory = "something";
    }

    return global;

  })();

  angular.module('yourapplication').run(['$rootScope', global]);

}).call(this);

In CoffeeScript (using ngClassify):

class global extends Run
    constructor: ($rootScope) ->

        $rootScope.view_directory  = "something"

Answer 4

Utilize the $rootScope object in AngularJS

[1]: https://docs.angularjs.org/api/ng/service/$rootScope "

[2]: "

For instance, in JavaScript:

(function() {
  var global;

  global = (function() {
    function global($rootScope) {
      $rootScope.view_directory = "something";
    }

    return global;

  })();

  angular.module('yourapplication').run(['$rootScope', global]);

}).call(this);

In CoffeeScript (using ngClassify):

class global extends Run
    constructor: ($rootScope) ->

        $rootScope.view_directory  = "something"

Answer 5

Answer №3

Here is the solution I came up with for my own question, including a complete working code snippet that builds upon the accepted answer.

var app = angular.module('app', []);

app.controller('MainCtrl', function($scope) {
  $scope.blocks = [
    {name: 'item #1'},
    {name: 'item #2'}
  ];
}).directive('externalBlock', function() {
  return {
    restrict: 'A',
    scope: {
      block: '=data'
    },
    link: function(scope, elm, attrs) {
      setupBlock(elm[0], scope.block);
    }
  }
});

<script src="https://code.angularjs.org/1.4.0-rc.2/angular.js"></script>
<script>
  // This function is from an external library
  // It is used to set up each block within ng-repeat
  // It manipulates the DOM
  function setupBlock(elm, block) {
    elm.innerHTML = block.name + ' [ready]';
  }
</script>

<body ng-controller="MainCtrl" ng-app="app">
  <div ng-repeat="block in blocks" external-block data="block"></div>
</body>

Answer 6

Here is the solution I came up with for my own question, including a complete working code snippet that builds upon the accepted answer.

var app = angular.module('app', []);

app.controller('MainCtrl', function($scope) {
  $scope.blocks = [
    {name: 'item #1'},
    {name: 'item #2'}
  ];
}).directive('externalBlock', function() {
  return {
    restrict: 'A',
    scope: {
      block: '=data'
    },
    link: function(scope, elm, attrs) {
      setupBlock(elm[0], scope.block);
    }
  }
});

<script src="https://code.angularjs.org/1.4.0-rc.2/angular.js"></script>
<script>
  // This function is from an external library
  // It is used to set up each block within ng-repeat
  // It manipulates the DOM
  function setupBlock(elm, block) {
    elm.innerHTML = block.name + ' [ready]';
  }
</script>

<body ng-controller="MainCtrl" ng-app="app">
  <div ng-repeat="block in blocks" external-block data="block"></div>
</body>

Executing an external function on an element as soon as it is created in AngularJS: tips and tricks

Answer №1

Answer №2

Answer №3

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