Issue Description

Angular runtime gives error nullinjectorerror: no provider for httpclient!

ERROR NullInjectorError: R3InjectorError(AppModule)[AccountService -> HttpClient -> HttpClient -> HttpClient]:
NullInjectorError: No provider for HttpClient!
at NullInjector.get (http://localhost:4200/vendor.js:11077:27)
at R3Injector.get (http://localhost:4200/vendor.js:25117:33)

In Chrome or other browser,

Resolution

The issue is more due to not registering the required services i.e. HttpClientModule in the root module ie. NgModule.

As per Angular Design and Architecture, every service (internal or external service) is required to be registered with root NgModule as required.

This issue could exist in the Application and in the Unit Test project. Please follow the below steps to resolve the issue.

Please register HttpClientModule in the root NgModule. File location app.module.ts

Configure for Application project – no provider for HTTP client

Add import statement as below,

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

Also please update the @NgModule decorator within the import section as below in the same file,

  imports: [
    BrowserModule,
    AppRoutingModule,
    HttpClientModule
  ],

Example:

Configure for Test project – no provider for HTTP client

While writing the Unit test for HttpClient-dependent services you may find it is very useful to use HttpClientTestingModule.

This module is very helpful for testing especially data services that make HTTP calls to the Servers.

Please import the HttpClientTestingModule and the mocking controller, HttpTestingController, along with the other symbols your tests require.

Please add below import statement below,

import { HttpTestingController, HttpClientTestingModule } 
from '@angular/common/http/testing';

Then please add the HttpClientTestingModule to the TestBed.

beforeEach(() => {
    TestBed.configureTestingModule({
        imports: [ HttpClientTestingModule ]
    });

Example:

Did I miss anything else in these resolution steps?

Did the above steps resolve your issue? Please sound off your comments below!

References:

• Angular – HTTP GET, PUT, POST and DELETE Request Examples

Happy Coding !!

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Issue Description

After installing the Angular CLI, ng is not recognized as an internal or external command.

 'ng' is not recognized as an internal or external command, operable program or batch file.

OR

The term 'ng' is not recognized as the name of a cmdlet

Resolution

This error I found to be due to improper configuration of Angular CLI in the target machine. This issue generally occurs post-installation of CLI.

Below are the few steps that I followed and how I was able to fix this issue.

Steps to fix – ng is not recognized issue

• Before providing the below fixes, please make sure to run the below command in the Node.js command prompt

ng --version

If the above ng commands work, then you are all set! If the issue persists, please look into the below steps.

• Let’s clear off the local cache and uninstall the existing Angular CLI Version.

npm uninstall -g @angular/cli 

npm cache clean  --force

• In addition to the above make sure %appdata% doesn’t have the below folders etc.

This additional precaution is to avoid any issues further. I

I am sure you must have tried a few other options already with no luck.

Please delete if any such folder exists from %appdata% and npm folders

Re-install Angular CLI globally

Please run the below command in Admin mode from Command Prompt (Preferred).

For a few of you, this command might work in regular CMD as well.

ng update @angular/cli @angular/core

Add the below path to an environment variable. First, try updating in User Variable section ‘Path‘ variable.

 C:\Users\{userName}\AppData\Roaming\npm

OR

%USERPROFILE%\AppData\Roaming\npm

Example:

Please try running the ng –version in the new cmd window.

Tops- Before running this command make sure to close all existing open , command prompts or node.js command prompt. This is required once you make any changes to the environment variable.

If the issue persists, please set the below path in a local variable in a similar way.

 C:\Program Files\nodejs\node_modules\npm\bin

Now please try running the ng –version again in a new command prompt.

Again before running this command make sure to close all command prompt/node.js command prompts.

If the issue persists, please set the below path in the Local variable

C:\Users\{username}\AppData\Roaming\npm\node_modules\@angular\cli\bin

OR

%USERPROFILE%\AppData\Roaming\npm\node_modules\@angular\cli\bin 

Close all command prompts and try running the ng –version again.

If the issue persists, please perform the above steps for the System Variables section and Path variable and repeat the above steps for the system variable.

You shall see ng commands working on all CLI interfaces in your machine.

CLI

Powershell

VSCode (powershell)

References:

• Angular Framework Migration Guidelines

• Angular – Pass Data From Parent to Child and Child to Parent Component

Did I miss something in these steps? Did the above steps resolve your issue?

Please sound off your comments below!

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Today in this article, we will cover below aspects,

Below are a few examples of the Angular CLI Common Commands, Error and Resolution dictionary,

Angular CLI Common Commands

Common errors and their resolution

Error:

An unhandled exception occurred: Cannot find module ‘@angular-devkit/build-angular/package.json’

Resolution

Please see here for resolution,

• Cannot find module @angular-devkit/build-angular/package.json

Error:

“Could not find module “@angular-devkit/build-angular”

Resolution

Resolution steps are captured in the below post,

• Could not find module “@angular-devkit/build-angular”

Error:

“Cannot find module ‘@angular/compiler'”

Resolution

To fix the issue, please run the below command

npm install  angular/compiler

Error :

“Cannot find module ‘@angular/compiler-cli/ngcc”

Resolution

To fix the issue, please run the below command

npm install  angular/compiler-cli/ngcc 

Error:

“Can not find module ‘angular/compiler-cli’

Resolution

To fix the error please install the Angular CLI using the below command

npm install --save-dev @angular/cli@latest

Error:

Angular 13

This version of cli is only compatible with angular versions ^12.0.0-next || >=12.0.0 <13.0.0, but angular version 11.2.14 was found instead

Resolution

Please see below article,

This version of cli is only compatible with angular versions ^12.0.0-next || >=12.0.0 <13.0.0, but angular version 11.2.14 was found instead.

Error:

“Repository is not clean. Please commit or stash any changes before updating”.

Resolution

Please see below article,

• Repository is not clean. Please commit or stash any changes before updating.

Error:

“‘ng’ is not recognized as an internal or external command, operable program or batch file”

Resolution

Please see here for resolution,

Resolved:’ng’ is not recognized as an internal or external command, operable program or batch file

Error:

“Could not find the implementation for builder @angular-devkit/build-angular:browser”

Resolution

Please see here for resolution,

• Could not find the implementation for builder @angular-devkit/build-angular:browser

Error:

Job name “..getProjectMetadata” does not exist.
Error: Job name “..getProjectMetadata” does not exist.
at Observable._subscribe

Resolution

Please see here for resolution,

• Job name “..getProjectMetadata” does not exist

Other useful references:

• Getting Started with Angular 8
• Form Validation in Angular
• Data Binding in Angular Forms

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Issue Description

Angular build command gives below error,

Could not find the implementation for builder @angular-devkit/build-angular:dev-server 

Resolution

This is how I was able to fix these issues and was able to build an Angular app on the latest CLI.

Steps to fix all issues

• Install devkit and builder package

npm i @angular-devkit/build-angular

It’s preferred to uninstall the version first using the below commands and retry installing the pacakge,

npm uninstall @angular-devkit/build-angular

For any error with the above command please visit below error checklist

• Angular commands and Error Checklist

• Run ng update command to get a list of all dependencies required to be upgraded.

ng update

• Upgrade the angular core packages as listed above, you may find more packages in the list depending on app complexities.

ng update @angular/cli @angular/core

OR

ng update @angular/cli @angular/core --allow-dirty --force

• Build the app using ng build

ng build

Finally, the build is successful.

For any issue if still surfacing, you may try deleting node_module folder manually or using below command and performing above steps again.

npm rm -rf node_modules

Other references:

• Getting Started with Angular 8

• Repository is not clean. Please commit or stash any changes before updating

• Angular CLI Common Errors and Resolution dictionary

That’s all! Happy coding!

Does this help you fix your issue?

Do you have any better solutions or suggestions? Please sound off your comments below.

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Issue Description:

Angular build commands give below error,

“Can not find module “@angular-devkit/build-angular”

Resolution

To fix the issue, please run the below command

npm i @angular-devkit/build-angular

What Is Angular-DevKit?

DevKit provides a large set of libraries that are used to manage, develop, deploy and analyze code. Angular CLI is built on the top of Angular DevKit.

Angular DevKit provides below set of packages and tools which are very helpful means for managing, deploying and developing code.

• @angular-devkit/architect

• @angular-devkit/build-angular

• @angular-devkit/build-ng-packagr

• @angular-devkit/build-optimizer

• @angular-devkit/build-webpack

• @angular-devkit/core

• @angular-devkit/schematics

Other references:

• Angular Commands and Error Dictionary
• Cannot find module @angular-devkit/build-angular/package.json

That’s all! Happy coding!

Does this help you fix your issue?

Do you have any better solutions or suggestions? Please sound off your comments below.

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