Avoiding HTML injection in custom directives

In my custom directive, I have implemented the functionality to render strings with LaTeX using MathJax.js. Below is the code snippet:

MathJax.Hub.Config({
    skipStartupTypeset: true,
    tex2jax: {
      inlineMath: [['$','$'], ['\\(','\\)']],
      processEscapes: true
    }
});
MathJax.Hub.Configured();

angular.module('mathjaxModule', [])

.directive("mathjaxBind", function() {
    return {
        restrict: "A",
        controller: ["$scope", "$element", "$attrs", function($scope, $element, $attrs) {
            $scope.$watch($attrs.mathjaxBind, function(value) {
                $element.text(value == undefined ? "" : value);
                MathJax.Hub.Queue(["Typeset", MathJax.Hub, $element[0]]);
            });
        }]
    };
});

To use this directive, follow the format below:

<span mathjax-bind="textToRender"></span>

The advantage of this directive is the ability to combine text with MathJax expressions effortlessly. However, one limitation is that when the strings contain HTML tags, ng-bind-html cannot be utilized alongside the custom directive.

I attempted a solution like this, but it was not successful:

<span mathjax-bind="textToRender" ng-bind-html="textToRender"></span>

It appears that there may be a misunderstanding in the approach. Is there an alternative method to address this issue?

Answer №1

I was in a similar situation and managed to find the solution I needed at this website:

Below is the code snippet I used:

.directive('mathjax',function(){
  return {
    restrict: 'A',
    link: function($scope, $element, $attrs) {
      $scope.$watch($attrs.ngBindHtml, function () {
        MathJax.Hub.Queue(['Typeset',MathJax.Hub,$element[0]]);
      });
    }
  };
});

You can then implement it like this:

<span ng-bind-html="textToRender" mathjax></span>

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