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Angular Notes

Angular

Core Java

HTML + CSS+ JS -- Front End

JS - JavaScript

Alert box

Run time message

Event Handling

Validation

Servlets & JSP -- Backend

MVC

Spring

SpringBoot

Struts

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Problems faced while working with JS:

1) Errors are not prompted

2) JS code is embedded inside HTML.

?(Design + Logic part)

3) code becomes to cumbersome. (spagetti code) -- messy code

*************************

sample.js

functions

html

how will u link the html page with js page

HTML

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Things are messy when they are kept together?

what is the need of the hour to simplify things?

Separate the stuff

Model View

Separation Of concern:

Framework is required: Angular

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Pre requisites for Angular

1) Node.js should be installed on ur machine

2) Visual Studio code has be installed

3) install angular on ur machine /

?update angular

4) browser

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To create a new Angular Project :

1. go to terminal of visual studio / command prompt

2. type "ng new helloWorldDemo"

Syntax: ng new projectName

3: Would you like to add Angular routing? press y

4. Which stylesheet format would you like to use? select CSS with the help of the arrow key.

Then it will take 2-5 minutes for the project to get created.

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After project creation to open the project :

Select file --> Open Folder -->go to ur folder and select ur project.

a new Visual Studio screen will open up.

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Important Files in the Project:

In the first Chapter we are going to work with the following files:

(These files are present inside src/app folder)

1) app.component.html (works as my view file)

2) app.component.css

3) app.component.ts -- (works as my model file)

some html code is already there

I will simply run

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How to run :

//this one will run but will not open the browser

ng serve

//this command will run the app and also open the browser

ng serve --open

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To change the title dont make any changes in the HTML file.

Just open app.component.ts file and change the title:

The code is as follows:

_______________________________________

import { Component } from '@angular/core';

@Component({

selector: 'app-root',

templateUrl: './app.component.html',

styleUrls: ['./app.component.css']

})

export class AppComponent {

title = 'Welcome to my Page';

}

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In the app.component.html file the title gets displayed:

<span>{{ title }} app is running!</span>

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or u can have the following code in app.component.html file

<span>{{ title }} app is running!</span>

<router-outlet></router-outlet>

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We did not make use of any JS file.

JS is difficult to write and difficult to maintain.

We wrote ts.

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