Error: Unable to inject HttpClient dependency. Angular 5

I recently switched to using the Angular template in Visual Studio 2017 and decided to update to Angular 5.2. However, I encountered an error while trying to make a http call from the service class.

The error message I received is: https://i.sstatic.net/pV6pk.png

Here is the code snippet from my Service.TS file:

(Code snippet from Service.TS goes here)

And this is the Component class code:

(Code snippet from Component class goes here)

Lastly, here is the content of my app.shared.module.ts file:

(Content of app.shared.module.ts file goes here)

As a beginner in Angular, I'm unsure where I might have made a mistake. I attempted adding HttpClient under @NgModule but encountered another error. Do I need to explicitly add HttpClient in the app.shared.module.ts file or is it sufficient to use it at the service and component levels only? Any guidance on what I might be doing wrong would be greatly appreciated.

Answer №1

HttpClient requires the HttpClientModule module to be imported and included in the imports of the module, instead of HttpModule.

To learn more, check out the Documentation

import { HttpClientModule } from '@angular/common/http';

@NgModule({
    declarations: [
        ...
    ],
    imports: [
        ...
        HttpClientModule,
        ...
    ]
})
export class AppModuleShared { }

Answer №2

npm clear cache 
npm update 
rm -rf /node_modules
npm i --save 

Next, include the same module in the root module of your app. Fingers crossed that this solution does the trick for you.

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