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

Similar questions

Determining the availability of a remote source in React: A step-by-step guide

AngularJS http requests fail to include session cookies when making CORS requests

Is there a way to adjust this validation logic so that it permits the entry of both regular characters and certain special characters?

Navigate to a PDF file from an HTML5 application using PhoneGap by accessing an external link

Implications of using literals, objects, or classes as arguments in functions that are called multiple times can have

Disabling the visibility of elements through a transparent sticky-top menu

Using Angular JS: Implementing ng-repeat with a personalized directive and a fluid model

The service worker is sending out a pair of requests

Tips for halting click propagation in VueJS

Invoke a function from a different source in JavaScript

Add a library to a server with npm installation

Combining multiple arrays in Node.js to create a single JSON file

What is the best way to display a 'confirmed' message on my registration page once a user has submitted their information?

Transform an asynchronous callback into an asynchronous generator format

Attempting to conceal a div element along with its contents using AngularJS

Utilizing jQuery for displaying or hiding list elements

Is it possible to compile TypeScript modules directly into native code within the JavaScript data file?

An issue has been encountered with the Vue Router within the Micro Front End/Web Components setup, displaying the error message: "Uncaught TypeError:

What is the best way to choose a date and time in a custom format within my React application?

Asynchronous Function Implementation of Cookies in JavaScript