How to Safely Render HTML Fragments in AngularJS Views?

Inserting HTML Fragments into View from AngularJS Controller

In AngularJS, it is possible to create HTML fragments in the controller and have them rendered in the view. This can be useful for dynamically generating lists or other complex UI elements.

To achieve this, first create a model property to hold the HTML fragment. In the example below, we create a "customHtml" property:

var SomeController = function () {
    this.customHtml = '<ul><li>render me please</li></ul>';
}

Next, use the ng-bind-html directive in the view to bind the customHtml property to an element:

<div ng-bind-html="customHtml"></div>

However, AngularJS will render the HTML as a string within quotes, as it treats it as unsafe for sanitization purposes. To resolve this, you can either use the $sce service or include the ngSanitize module.

Using $sce

First, inject the $sce service into the controller:

app.controller('SomeController', function($sce) {
    // ...
});

Then, use the $sce.trustAsHtml() method to convert the HTML string to a safe format:

this.customHtml = $sce.trustAsHtml(someHtmlVar);

Using ngSanitize

To use ngSanitize, first include the angular-sanitize.min.js script:

<script src="lib/angular/angular-sanitize.min.js"></script>

Then, include ngSanitize as a dependency in your AngularJS module:

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

With ngSanitize, you can directly assign the HTML string to the model property:

this.customHtml = someHtmlVar;

Both methods allow you to dynamically generate and render HTML fragments in the view, providing greater flexibility in your AngularJS applications.

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