AngularJS - how to dynamically delete a directive from an element

Looking for a way to dynamically add or remove directives from compiled and linked elements? I have a page with numerous inputs and want to disable all of them if a specific flag is set. The conventional method using jQuery's element.prop('disabled', true) runs into issues when dealing with inputs that have ng-disabled or ng-enabled directives, as their expressions can override the 'disabled' property previously set globally.

I considered adding more watchers for ng-disabled or ng-enabled expressions, but this doesn't seem ideal. My goal is to remove most of the attached directives on the element and set appropriate attributes myself without causing memory leaks. Recompiling and relinking the element seems to result in a memory leak, as the old element remains in memory even after being removed from the DOM document tree. Additionally, destroying the element's scope isn't an option since these elements rely on the main scope of the entire page.

Answer №1

If you want to display content based on a boolean value in Angular, you can use the ng-show directive like this:

<div ng-show="someBoolean" >Content to show or nested element</div>

Alternatively, instead of using a simple boolean variable, you can attach a function to resolve to a boolean value:

<button type="button" ng-click="setBoolean()">Content to show or nested element</button>

By updating your model/boolean value dynamically with ng-click, the ng-show directive will reflect these changes after the digest cycle is complete due to Angular's two-way data binding.

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