I'm curious if anyone has experimented with implementing TypeScript enums within AngularJS HTML pages

During my Typescript project, I defined an enum like this:

enum Action { None = 0, Registering = 1, Authenticating = 2 };

In the controller, I declared a property named action as follows:

class AuthService implements IAuthService {

    action: number;

    constructor(
        private $state,
        private userService,
        private utilityService: IUtilityService
        ) {

        this.action = Action.None;

    }

    doRegister() => {
       this.action = Action.Registering;
    }

The setup works well, but I'm wondering how to make use of the enum in my HTML markup. Is there a way to achieve this? Ideally, I'd like to incorporate it in a similar manner:

<span ng-class="{'fa-spin fa-spinner': app.authService.authenticating }">

Without having to create separate variables like:

app.authService.authenticating
app.authService.registering
...
etc

Answer №1

To store this information, you can utilize the $rootScope like so:

app.run([
    '$rootScope'
], function ($rootScope){

    // Store data on $rootScope
    $rootScope.Action = Action;
});

Since every $scope inherits from it, the data is accessible on each scope using Action.foo and more.

Keep in mind that for directives with an isolated scope, you would need to use $root.Action.foo as just Action won't work due to intentional prototype chain breaks.

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