Is it possible that an error is triggered when utilizing canActivate or canChildActivate?

A problem has arisen while using canActivateChild or canActivate in the child route. Despite working fine previously, an error is now being thrown:

ERROR in src/app/app-routing.module.ts(8,7): error TS2322: Type '({ path: string; redirectTo: string; pathMatch: string; } | { path: string; component: typeof Log...' is not assignable to type 'Route[]'.
  Type '{ path: string; redirectTo: string; pathMatch: string; } | { path: string; component: typeof Logi...' is not assignable to type 'Route'.
    Type '{ path: string; component: typeof MainContentComponent; canActivateChild: typeof PlayVidAuthGuard...' is not assignable to type 'Route'.
      Types of property 'canActivateChild' are incompatible.
        Type 'typeof PlayVidAuthGuardService' is not assignable to type 'any[]'.
          Property 'includes' is missing in type 'typeof PlayVidAuthGuardService'.

The routing module causing this issue looks like this:

const appRoutes: Routes = [
  { path: "", redirectTo: "login", pathMatch: "full" },
  { path: "login", component: LoginComponent },
  {
    path: "home",
    component: MainContentComponent,
    canActivateChild: PlayVidAuthGuardService,
    children: [
      {
        path: "",
        component: PlayVideoComponent
      }
    ]
  }
];

Removing the canActivateChild attribute resolves the error.

export class PlayVidAuthGuardService implements CanActivate {
  constructor() {}
  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    return true;
  }
}

Even adding canActivate to the child route results in the same error message. How can this be fixed? Thank you!

Answer №1

When implementing the CanActivate interface, ensure that you assign it to the correct property: canActivateChild. To use canActivateChild, you must implement the CanActivateChild interface.

Additionally, make sure to initialize these properties with an array:

...
canActivateChild: [ PlayVidAuthGuardService ]
...

The error message

Property 'includes' is missing in type 'typeof PlayVidAuthGuardService'.

indicates that Angular is looking for a function named includes within canActivateChild, which is not found because you have assigned something that is not an array.

Answer №2

In order for these guard fields to work properly, they require an array input. Therefore, you should enclose your guard within an array with a single element:

// Instead of doing this...
// canActivate: YourGuard,

//... do this instead:
//           v         v
canActivate: [YourGuard],

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Encountering ExpressionChangedAfterItHasBeenCheckedError when using Mat-select with *ngIf

I'm currently working with a mat-form-field that needs to contain either an input or a select element. Oddly enough, when I use an <input> element, the *ngIf directive functions perfectly. However, if I decide to use a <mat-select> as sho ...

Issue with ngSubmit not being triggered in Angular Reactive Form

Just jumping into Angular and experimenting with reactive forms while following a tutorial. Struggling to get my ngSubmit() function to work - the submit button doesn't respond no matter what I try. Spent ages trying to troubleshoot but no luck so far ...

Issue with npm Installation on Self-hosted Azure DevOps Agent running as NetworkService

Our Azure DevOps Server is set up with self-hosted Build Agents that operate as Windows Services under the user NetworkService. Within our project, we have a .NET Application containing both public and private NuGet Packages from a self-hosted Repository, ...

Updating the latest version of Typescript from NPM is proving to be a challenge

Today, my goal was to update Typescript to a newer version on this machine as the current one installed is 1.0.3.0 (checked using the command tsc --v). After entering npm install -g typescript@latest, I received the following output: %APPDATA%\npm&b ...

Tips for incorporating a captcha image into your angular 8 application

I would like to implement a captcha element with an image of letters and an input field for the user, (I prefer not to use the "I am not a robot" version) similar to this example: Is this feature still available today? ...

Update the data in Firebase, but revert it back to the original state after a few seconds with the use of "angularFire."

I'm currently working on updating data in the Firebase Realtime Database using Angular and AngularFire. The issue I'm facing is that even though the data changes successfully, it reverts back to the original data after a few seconds. Below is the ...

Update the CSS variables in Angular Material version 15 to reflect new changes

Angular Material 15 introduces some significant changes to colors and spacing. As a result, I find myself needing to override the default CSS variable values in my styles.scss file. :root { --mdc-typography-button-letter-spacing: 'normal'; ...

Is it possible to directly parse a multipart/mixed response without needing to first convert it into a string?

My current challenge involves receiving a multipart/mixed response over HTTP that includes JSON data and PDFs in byte format. Due to Angular's limitations with handling such responses, I have resorted to converting the response into a string using the ...

Problem encountered when attempting to retrieve information from a web service in Angular 4

I am currently attempting to retrieve data from a web service API. However, all I can see is the data on the console. The web service requires an ID, so I input the ID first and then proceed to obtain the data related to that ID within the web service us ...

Optimal strategies for managing subscriptions in Angular

I'm currently pondering about the concept of angular subscription and unsubscription. The amount of information available on this topic is overwhelming, making it hard for me to navigate through. When is the right time to unsubscribe from a subscript ...

An error message occurs in TypeScript when trying to access a property that does not exist in an array

I'm having trouble figuring out this issue... I am receiving data from an API and storing it as an array. I'm attempting to access the data in this format... this.data.results[i].datas[j].dataType However, I keep getting the error "property res ...

Can a new record be created by adding keys and values to an existing record type while also changing the key names?

If I have the following state type, type State = { currentPartnerId: number; currentTime: string; }; I am looking to create a new type with keys like getCurrentPartnerId and values that are functions returning the corresponding key's value in Sta ...

Using services in Angular 6 CLI with dynamically added components

One of my recent projects involved creating a directive in Angular 6 called 'DeleteDirective' and integrating it with a service called 'DeleteService' to enable the deletion of items from the application. Once an item is deleted (handle ...

What is the best way to incorporate additional properties while utilizing useSession in Next.js with TypeScript?

I've encountered an issue while trying to add new properties using useSession() in a TypeScript environment. Although it works on console.log, there is an error related to the type mismatch. The useSession() function typically returns name, email, an ...

Using TypeScript to assign values to object properties

In myInterfaces.ts, I have defined a class that I want to export: export class SettingsObj{ lang : string; size : number; } Now I need to reference this class in another file named myConfig.ts in order to type a property value for an object called CO ...

Ways to retrieve element values within Angular

Here is an example of an element: <li class="someClass">value1<span>value2</span></li> This list element is created using vanilla JavaScript, and a click event is bound to it as demonstrated below: const list = Array.from(documen ...

​Troubleshooting findOneAndUpdate in Next.js without using instances of the class - still no success

After successfully connecting to my MongoDB database and logging the confirmation, I attempted to use the updateUser function that incorporates findOneAndUpdate from Mongoose. Unfortunately, I ran into the following errors: Error: _models_user_model__WEBPA ...

Working with multiple observables in an array of properties using RXJS

I'm relatively new to using rxjs in my angular projects and I'm facing a challenge with a simple scenario. When making an http call to retrieve a group, it returns data including a list of "buddy ids", "genre ids", and a "region id". In order t ...

JavaScript maintaining records and connections between multiple asynchronous events

I am working on an Angular 10 project where users can compress and upload images to Google Cloud Storage. The compression and uploading functionalities are functional, but I'm facing challenges with managing the asynchronous process of handling multip ...

Is there a way to convert a literal type from the type level to the term level in TypeScript?

Consider this scenario: I have created a type that can only hold one specific value: export type IfEqual<T, U> = (<G>() => G extends T ? 1 : 2) extends ...