Lesson 5/100

Tutorials Angular Tutorial

Create a New App

Create a New App: free step-by-step lesson with examples, common mistakes, and interview tips — part of Angular Tutorial on Toolliyo Academy.

8 min read Updated 7/21/2026

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Angular Tutorial · Lesson 5 of 100

Create a New App

Setup & Components → Routing HTTP Rx → State & Perf → Ship & Projects

Setup & Components · 1 — UI · ~6 min · Setup

What is this?

Create a New App gets your Angular toolchain and project ready.

Why should you care?

Without a clean setup, every later lesson fights the environment.

See it live — copy this example

Run examples in an Angular CLI project (ng serve). Prefer standalone components and TypeScript strict mode.

# Create a New App
ng version
ng new angularverse --defaults
cd angularverse && ng serve

What happened?

CLI version, new app, and serve are the bootstrap path for your Angular app.
Follow the steps below — typing the code yourself is the fastest way to learn.

Practice next

Reproduce the snippet in an Angular CLI app.
Change one binding or route and re-serve.
Note one mistake you almost made.
Extract a service.
Add a trivial unit test later.

Remember

You can explain Create a New App simply. You ran a small Angular demo. You know one pitfall.

Create a New App in AngularVerse

Your team applies create a new app on an admin UI.

Outcome: A concrete next coding step exists.

Interview prep for this lesson

Practice these questions aloud after reading—each links to a full structured answer.

Mid PDF Detailed

Create a feature module with routing:?

ng generate module admin --route admin --module app.module What interviewers expect A clear definition tied to Angular in Angular projects Trade-offs (performance, maintainability, security, cost) When you would and woul…

Junior PDF Detailed

How do you test Angular components? ● Use Angular’s TestBed to create a testing module that declares the component. ● Instantiate the component and its template for testing. ● Test component logic, DOM rendering, event handling, and bindings. ● Use Angular testing utilities like fixture.detectChanges() to update the view. Basic example: beforeEach(async () => {

wait TestBed.configureTestingModule({ declarations: [MyComponent] }).compileComponents(); fixture = TestBed.createComponent(MyComponent); component = fixture.componentInstance; fixture.detectChanges(); }); it('should cre…

Junior PDF Detailed

What is the Angular CLI, and how do you use it to create Angular applications?

The Angular CLI (Command Line Interface) is a tool to generate, build, test, and maintain Angular apps efficiently. It automates repetitive tasks and enforces best practices. You can create a new Angular app with: ng new…

Junior PDF Detailed

What is trackBy in ngFor, and how does it improve performance? trackBy is a function used with *ngFor to tell Angular how to track list items uniquely. Why it matters: Without trackBy, Angular recreates DOM elements on each update, causing performance overhead. ✅ Example: <div *ngFor="let item of items; trackBy: trackById"> {{ item.name }} </div> trackById(index: number, item: any) { return item.id; // unique id per item }

ngular reuses existing DOM elements instead of recreating them. What interviewers expect A clear definition tied to Angular in Angular projects Trade-offs (performance, maintainability, security, cost) When you would and…

Mid PDF Detailed

How can you create a custom Angular builder?

Angular CLI supports custom builders to extend build behavior. Create a Node.js package implementing the Builder interface. Define builder options and logic in a builders.json. Use the custom builder in angular.json for…

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