Creating a resolver in angular for video data

Published on October 18, 2023 by Manohar & Upendra

Introduction:

In this tutorial, we will walk you through the process of creating a resolver in an Angular application to fetch video data from a public API. Resolvers are an essential part of Angular's route handling, ensuring data is available before rendering a component.

Step 1: Create a Resolver in Services

First, let's create a resolver in your Angular project. Open your terminal and use the Angular CLI to generate a resolver.

ng g resolver resolverName

This command will generate a new resolver file for you.

Step 2: Declare the URL in the Resolver Method

In the newly created resolver file, you need to declare the URL to fetch data from using Angular's HTTP module. For example:

import { Injectable } from '@angular/core';
import { Resolve } from '@angular/router';
import { HttpClient } from '@angular/common/http';

@Injectable()
export class ResolverName implements Resolve {
  constructor(private http: HttpClient) {}

  resolve() {
    const apiUrl = 'https://api.example.com/videos'; // Replace with your API URL
    return this.http.get(apiUrl);
  }

Make sure to replace https://api.example.com/videos with the actual API URL you intend to use.

Step 3: Declare in app.routing.ts

Now, you need to integrate the resolver into your application's routing. Open your app.routing.ts and declare the resolver for the specific route. For example:

import { ResolverName } from './path-to-resolver';

const routes: Routes = [
  {
    path: 'video',
    component: ResloverComponentName, // Replace with your component name
    resolve: {
      videoData: ResolverName, // Use the resolver you created
    },
  },
  // Other routes...

Replace 'video', ResloverComponentName, and ResolverName with your specific route path, component name, and resolver name.

Step 4: Declare in app.module.ts

Finally, you need to include the resolver in your app.module.ts file. Import the resolver and add it to the providers array.

import { ResolverName } from './path-to-resolver';

@NgModule({
  declarations: [AppComponent],
  imports: [AppRoutingModule],
  providers: [ResolverName], // Add your resolver to the providers array
  bootstrap: [AppComponent],

And that's it! You've successfully created and integrated a resolver in your Angular application to fetch video data. Now, when you navigate to the specified route, the data will be resolved and available for your component to use.

Conclusion:

In this tutorial, we've covered the process of creating a resolver in Angular for fetching video data, making your application more efficient and user-friendly. Resolvers are a powerful tool to ensure data is available before rendering a component, improving the overall user experience in your Angular application.