Adding dynamically generated HTML elements and binding them to an AngularJS controller is a powerful capability that

Question

Adding dynamically generated HTML elements and binding them to an AngularJS controller is a powerful capability that

As I dive into learning angularJS, I am facing a challenge in determining the best architecture for my project. My single page app is designed in such a way that the URL must always remain unchanged; I do not want users to navigate beyond the root route. The main div of my app will be used to display different views, with each new view taking over the display in this main div. These views can either be temporary or persist hidden in the DOM - I am curious to see how both scenarios play out.

I have created a basic working example of what I am aiming to achieve. You can find the demo here on Plunk. Essentially, I need to dynamically load HTML content into the DOM and allow standard angularJS controllers to interact with this new HTML. Is there a simpler or more efficient way to accomplish this without using the custom directive I am currently employing and avoiding the use of $compile() to connect to angular? Maybe there is a tool similar to a router that doesn't require changes in the URL to function?

Below is the special directive I have been utilizing, sourced from another post on Stack Overflow:

// Extracted from: http://stackoverflow.com/questions/18157305/angularjs-compiling-dynamic-html-strings-from-database
myApp.directive('dynamic', function ($compile) {
  return {
    replace: true,
    link: function (scope, ele, attrs) {
      scope.$watch(attrs.dynamic, function(html) {
        if (!html) {
            return;
        }
        ele.html((typeof(html) === 'string') ? html : html.data);
        $compile(ele.contents())(scope);
      });
    }
  };
});

Regards,

Andy

javascript angularjs

Answer 1

Answer №1

If I were to choose, I'd opt for the convenient ngInclude directive. You can effortlessly use this method without writing any JavaScript code. The templates can also reside on a remote URL.

Take a look at this functional demonstration: http://plnkr.co/edit/5ImqWj65YllaCYD5kX5E?p=preview

<p>Choose a page content template from the dropdown menu</p>
<select ng-model="template">
    <option value="page1">Page 1</option>
    <option value="page2">Page 2</option>
</select>

<p>Change the page content template by clicking a button</p>
<button ng-click="template='page2'">Show Page 2 Content</button>

<ng-include src="template"></ng-include>

<script type="text/ng-template" id="page1">
    <h1 style="color: blue;">This is the content of page 1</h1>
</script>

<script type="text/ng-template" id="page2">
    <h1 style="color:green;">This is the content of page 2</h1>
</script>

Answer 2

If I were to choose, I'd opt for the convenient ngInclude directive. You can effortlessly use this method without writing any JavaScript code. The templates can also reside on a remote URL.

Take a look at this functional demonstration: http://plnkr.co/edit/5ImqWj65YllaCYD5kX5E?p=preview

<p>Choose a page content template from the dropdown menu</p>
<select ng-model="template">
    <option value="page1">Page 1</option>
    <option value="page2">Page 2</option>
</select>

<p>Change the page content template by clicking a button</p>
<button ng-click="template='page2'">Show Page 2 Content</button>

<ng-include src="template"></ng-include>

<script type="text/ng-template" id="page1">
    <h1 style="color: blue;">This is the content of page 1</h1>
</script>

<script type="text/ng-template" id="page2">
    <h1 style="color:green;">This is the content of page 2</h1>
</script>

Answer 3

Answer №2

There is another alternative method as well

step 1: start by creating a sample.html file
step 2: then, create a div tag with an id=loadhtml For example:
```
<div id="loadhtml"></div>
```

step 3: within any Controller

    var htmlcontent = $('#loadhtml ');
    htmlcontent.load('/Pages/Common/contact.html')
    $compile(htmlcontent.contents())($scope);

This process will effectively load an HTML page into the current page

Answer 4

There is another alternative method as well

step 1: start by creating a sample.html file
step 2: then, create a div tag with an id=loadhtml For example:
```
<div id="loadhtml"></div>
```

step 3: within any Controller

    var htmlcontent = $('#loadhtml ');
    htmlcontent.load('/Pages/Common/contact.html')
    $compile(htmlcontent.contents())($scope);

This process will effectively load an HTML page into the current page

Answer 5

Answer №3

For those, like me, who were unable to utilize an angular directive and found themselves isolated from the angular scope, I have come up with a solution that might be useful.

After extensive searching online and through the angular documentation, I have developed a utility class that compiles HTML, places it within specified targets, and connects it to a scope (using $rootScope if no $scope is available for the element).

/**
 * AngularHelper: A collection of methods to facilitate using angular outside the scope of a controller or directive
 */
var AngularHelper = (function () {
    var AngularHelper = function () { };

    /**
     * ApplicationName: The default application name for the helper
     */
    var defaultApplicationName = "myApplicationName";

    /**
     * Compile: Compiles HTML with the rootScope of an application
     *  and replaces the content of a target element with the compiled HTML
     * @$targetDom: The DOM where the compiled HTML will be inserted
     * @htmlToCompile: The HTML to compile using angular
     * @applicationName: (Optional) The name of the application (uses default if empty)
     */
    AngularHelper.Compile = function ($targetDom, htmlToCompile, applicationName) {
        var $injector = angular.injector(["ng", applicationName || defaultApplicationName]);

        $injector.invoke(["$compile", "$rootScope", function ($compile, $rootScope) {
            // Obtain the scope of the target; use rootScope if not available
            var $scope = $targetDom.html(htmlToCompile).scope();
            $compile($targetDom)($scope || $rootScope);
            $rootScope.$digest();
        }]);
    }

    return AngularHelper;
})();

This solution has worked well for my needs, but I welcome any suggestions or edits you may have.

I hope this proves helpful to others in a similar situation.

Answer 6

For those, like me, who were unable to utilize an angular directive and found themselves isolated from the angular scope, I have come up with a solution that might be useful.

After extensive searching online and through the angular documentation, I have developed a utility class that compiles HTML, places it within specified targets, and connects it to a scope (using $rootScope if no $scope is available for the element).

/**
 * AngularHelper: A collection of methods to facilitate using angular outside the scope of a controller or directive
 */
var AngularHelper = (function () {
    var AngularHelper = function () { };

    /**
     * ApplicationName: The default application name for the helper
     */
    var defaultApplicationName = "myApplicationName";

    /**
     * Compile: Compiles HTML with the rootScope of an application
     *  and replaces the content of a target element with the compiled HTML
     * @$targetDom: The DOM where the compiled HTML will be inserted
     * @htmlToCompile: The HTML to compile using angular
     * @applicationName: (Optional) The name of the application (uses default if empty)
     */
    AngularHelper.Compile = function ($targetDom, htmlToCompile, applicationName) {
        var $injector = angular.injector(["ng", applicationName || defaultApplicationName]);

        $injector.invoke(["$compile", "$rootScope", function ($compile, $rootScope) {
            // Obtain the scope of the target; use rootScope if not available
            var $scope = $targetDom.html(htmlToCompile).scope();
            $compile($targetDom)($scope || $rootScope);
            $rootScope.$digest();
        }]);
    }

    return AngularHelper;
})();

This solution has worked well for my needs, but I welcome any suggestions or edits you may have.

I hope this proves helpful to others in a similar situation.

Answer 7

Answer №4

To gain a better understanding, take a look at this example for clarity. Essentially, you define a series of routes and incorporate partial templates depending on the route. By placing ng-view in your main index.html file, you can insert these partial views.

The configuration section will resemble the following:

  .config(['$routeProvider', function($routeProvider) {
    $routeProvider
      .when('/', {controller:'ListCtrl', templateUrl:'list.html'})
      .otherwise({redirectTo:'/'});
  }])

The starting point for injecting the partial view into your main template is:

<div class="container" ng-view=""></div>

Answer 8

To gain a better understanding, take a look at this example for clarity. Essentially, you define a series of routes and incorporate partial templates depending on the route. By placing ng-view in your main index.html file, you can insert these partial views.

The configuration section will resemble the following:

  .config(['$routeProvider', function($routeProvider) {
    $routeProvider
      .when('/', {controller:'ListCtrl', templateUrl:'list.html'})
      .otherwise({redirectTo:'/'});
  }])

The starting point for injecting the partial view into your main template is:

<div class="container" ng-view=""></div>

Answer 9

Answer №5

To ensure that a directive is executed after loading multiple templates, I devised the following solution:

utilModule.directive('utPreload',
    ['$templateRequest', '$templateCache', '$q', '$compile', '$rootScope',
    function($templateRequest, $templateCache, $q, $compile, $rootScope) {
    'use strict';
    var link = function(scope, element) {
        scope.$watch('done', function(done) {
            if(done === true) {
                var html = "";
                if(scope.slvAppend === true) {
                    scope.urls.forEach(function(url) {
                        html += $templateCache.get(url);
                    });
                }
                html += scope.slvHtml;
                element.append($compile(html)($rootScope));
            }
        });
    };

    var controller = function($scope) {
        $scope.done = false;
        $scope.html = "";
        $scope.urls = $scope.slvTemplate.split(',');
        var promises = [];
        $scope.urls.forEach(function(url) {
            promises.add($templateRequest(url));
        });
        $q.all(promises).then(
            function() { // SUCCESS
                $scope.done = true;
            }, function() { // FAIL
                throw new Error('preload failed.');
            }
        );
    };

    return {
        restrict: 'A',
        scope: {
            utTemplate: '=', // the templates to load (comma separated)
            utAppend: '=', // boolean: append templates to DOM after load?
            utHtml: '=' // the html to append and compile after templates have been loaded
        },
        link: link,
        controller: controller
    };
}]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>

<div class="container-fluid"
     ut-preload
     ut-append="true"
     ut-template="'html/one.html,html/two.html'"
     ut-html="'<my-directive></my-directive>'">
 
</div>

Answer 10

To ensure that a directive is executed after loading multiple templates, I devised the following solution:

utilModule.directive('utPreload',
    ['$templateRequest', '$templateCache', '$q', '$compile', '$rootScope',
    function($templateRequest, $templateCache, $q, $compile, $rootScope) {
    'use strict';
    var link = function(scope, element) {
        scope.$watch('done', function(done) {
            if(done === true) {
                var html = "";
                if(scope.slvAppend === true) {
                    scope.urls.forEach(function(url) {
                        html += $templateCache.get(url);
                    });
                }
                html += scope.slvHtml;
                element.append($compile(html)($rootScope));
            }
        });
    };

    var controller = function($scope) {
        $scope.done = false;
        $scope.html = "";
        $scope.urls = $scope.slvTemplate.split(',');
        var promises = [];
        $scope.urls.forEach(function(url) {
            promises.add($templateRequest(url));
        });
        $q.all(promises).then(
            function() { // SUCCESS
                $scope.done = true;
            }, function() { // FAIL
                throw new Error('preload failed.');
            }
        );
    };

    return {
        restrict: 'A',
        scope: {
            utTemplate: '=', // the templates to load (comma separated)
            utAppend: '=', // boolean: append templates to DOM after load?
            utHtml: '=' // the html to append and compile after templates have been loaded
        },
        link: link,
        controller: controller
    };
}]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>

<div class="container-fluid"
     ut-preload
     ut-append="true"
     ut-template="'html/one.html,html/two.html'"
     ut-html="'<my-directive></my-directive>'">
 
</div>

Adding dynamically generated HTML elements and binding them to an AngularJS controller is a powerful capability that

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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