▶️ Command to download angular if u already installed node js :

npm install -g @angular/cli

▶️ How to check whether node is already installed in your pc,command :

npm -v

▶️ How to check whether angular is installed properly or not,command :

ng v

▶️ How to create new angular project,command :

ng new <projectName>

▶️ How to create a new component in angular,command :

ng generate component <componentName>

or

ng g c <componentName>

1. One Way Data Binding :

a) {{variable name -One way data binding}} - Interpolation

<div class="col-6">
1. Interpolation
<p>First Name => {{firstName}}</p>
<div>{{rollNo}}</div>
</div>

b) [Property of element] = "firstName/variable name"-One way data binding - Property Binding

<div class="col-6">
2. Property Binding
<div>
<input type="text" [value]="firstName" name="" id="" >
<br>
<input type="text" [placeholder]="myPlaceHolder" name="" id="">
<br>
<div [class]="div1ClassName" style="height: 100px; width: 100px;"> </div>
</div>
</div>

c) (click)= "showWelcomeMessage()/Any method name"- One way data binding - Event Binding

<div class="col-3">
<button class="btn btn-success" (click)="showWelcomeMessage()">Show Welcome Text</button>
</div>

2. Two way data binding :

<div class="col-3">
<input type="text" [(ngModel)]="firstName" >


</div>

To create a new React application , we need to have node.js installed our pc.

▶️ Creating a new React Application :-

> npx create-react-app my-app

create-react-app is the actual command to actually create the project.
or(Modern Approach)
npm create vite@latest my-react-app-learning-react

Followed by checking following check boxes as follows :

◇ Select a framework:
│ React
│
◇ Select a variant:
│ TypeScript
│
◇ Which linter to use?
│ ESLint
│
◇ Install with npm and start now?
│ Yes

Note : By default , tsc will Still generate a .js File , so to prevent this we have to use a compiler flag as follows :-

tsc -noEmitOnError FileName.ts

PS C:\Users\subham.krishna\Desktop\typescript training\02-variables> tsc -noEmitOnError sample-types.ts