My Angular rendering appears to be malfunctioning after utilizing the afterRender callback

I am currently using this code snippet:

App.directive('afterRender', ['$timeout', function ($timeout) {
    var def = {
        restrict: 'A',
        terminal: true,
        transclude: false,
        link: function (scope, element, attrs) {
            $timeout(scope.$eval(attrs.afterRender), 0);
        }
    };
    return def;
}]);

and I invoke it like so:

after-render="disableFullPage"

The issue I'm encountering with the current code is that while the disableFullPage function is called correctly, Angular does not render any data. When I include:

{{message}}

the data is not rendered. Additionally, if I remove the after-render attribute, the rendering works as expected. I would appreciate assistance in identifying what might be incorrect in my approach. If possible, please make any necessary edits to the code above and provide a brief explanation for clarity, as I am still relatively new to Angular.

Answer №1

There are two main points to consider here.

Firstly, the use of terminal: true will halt further interpretation of directives and expressions.

As stated in the documentation:

When set to true, the current priority becomes the final set of directives that will be executed (directives at the same priority may still execute in an undefined order). Keep in mind that any expressions and directives used within the directive's template will also not be executed.

Secondly, $parse evaluates the given expression within the current scope, similar to writing a line of JavaScript code.

In the provided example, after-render="disableFullPage", if disableFullPage is a function, nothing will occur. It is necessary to include parentheses as if calling the function normally:

after-render="disableFullPage()"

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