How Can I Safely Inject Dynamic HTML Fragments into AngularJS Views from My Controller?

Injecting HTML Fragments into Views from AngularJS Controllers

AngularJS provides various ways to dynamically alter the view based on controller logic. In certain scenarios, the need arises to dynamically generate HTML fragments within the controller and display them in the view. To achieve this, it is necessary to consider how AngularJS interprets injected content.

Understanding AngularJS HTML Rendering

When setting a model property to an HTML fragment, AngularJS automatically escapes the HTML entities for security reasons. However, if the intention is to display the HTML as actual content, this escaping presents a challenge. The resulting HTML is rendered as a string within quotes, preventing its execution.

Solutions for Rendering Dynamic HTML Fragments

To overcome this limitation, AngularJS provides the following solutions:

ng:bind-html (Angular 1.x)

Utilize the ng:bind-html directive in the HTML to render the desired HTML content. However, this approach raises potential security vulnerabilities and requires the use of $sce or ngSanitize.

$sce

Use $sce.trustAsHtml() in the controller to mark the HTML string as safe for rendering. This method allows the content to be injected into the view without escaping:

$scope.thisCanBeusedInsideNgBindHtml = $sce.trustAsHtml(someHtmlVar);

ngSanitize

Incorporate the angular-sanitize.min.js resource into the HTML. Additionally, include ngSanitize in the AngularJS module in a JavaScript file:

angular.module('myApp', ['myApp.filters', 'myApp.services', 
    'myApp.directives', 'ngSanitize'])

By employing these techniques, you can effectively insert dynamically generated HTML fragments into AngularJS views from the controller.

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