DEV Community: Anil Singh

Nullinjectorerror no provider for httpclient Angular 17 | How to fix this Error

Anil Singh — Wed, 20 Mar 2024 16:33:55 +0000

In Angular 17 where the standalone true option is set by default, the app.config.ts file is generated in src/app/ and provideHttpClient(). We can be added to the list of providers in app.config.ts

Reference links -

Nullinjectorerror no provider for httpclient Angular 17
YouTube link for this Video - YouTube link

How To Get More YouTube Subscribers?

Anil Singh — Fri, 08 Mar 2024 12:56:03 +0000

Getting more YouTube subscribers involves a combination of creating high-quality content, optimizing your channel, engaging with your audience, and promoting your videos effectively. Here are some tips to help you increase your YouTube subscriber count:

Create High-Quality Content:

Focus on producing content that is interesting, valuable, and relevant to your target audience.

Invest time in video production, and editing, and use good-quality equipment for better visual and audio appeal.

Consistency is Key:
Upload videos on a regular schedule so that subscribers know when to expect new content.

Consistency helps build trust and keeps your audience engaged.

Optimize Your YouTube Channel:
Use an eye-catching and relevant channel banner and profile picture.

Write a compelling channel description that clearly explains what your content is about.

Organize your videos into playlists to make it easier for viewers to find related content.

To read full details, visit 12 Tips and Tricks to Get More YouTube Subscribers

Remember, building a subscriber base takes time, so be patient and stay focused on consistently delivering valuable content to your audience.

Angular 17 Encrypting Decrypting Data with CryptoJs | Angular 17 Tutorial | React

Anil Singh — Tue, 30 Jan 2024 07:50:26 +0000

Step 1:

First, let's install crypto-js in our Angular project using npm:

npm install crypto-js npm i --save-dev @types/crypto-js

Step 2:

Once crypto-js is installed, we can import it into our Local Service (EncrDecrService):

import * as CryptoJS from 'crypto-js';

Step 3:

Now we will add two encrypt and decrypt methods to handle encryption and decryption in our service class:

Step 4:
//Private Key

key = "encrypt!135790";

//To encrypt input data
public encrypt(password: string): string {
    return CryptoJS.AES.encrypt(password, this.key).toString();
}

//To decrypt input data
public decrypt(passwordToDecrypt: string) {
    return CryptoJS.AES.decrypt(passwordToDecrypt, this.key).toString(CryptoJS.enc.Utf8);
}

Angular Encrypting Decrypting Data with CryptoJs | Angular 17 Tutorial | npm install crypto-js

https://youtu.be/0VR6E8UPZZs

Download source code from GitHub: github.com/anilsingh581/CryptoJS

Angular 17 Tutorial for Beginners

Anil Singh — Sun, 21 Jan 2024 11:09:18 +0000

Angular 17 has a new syntax for control flow, better support for lazy loading of page components, and improved support for Server-Side Rendering (SSR). Additionally, the CLI now relies on ESBuild, significantly enhancing the build process.

Technical updates in Angular 17

New looping syntax
If-then-else
Switch
Block directives
Deferred rendering
SSR and SSG
New build system
Improved debugging for dependency injection

Angular 17 Tutorial for Beginners:-
What is Server-Side Rendering (SSR) and Why use SSR in Angular 17?
https://www.code-sample.com/2024/01/angular-17-server-side-rendering-ssr.html

What is Prerendering Static Site Generation (SSG)? Why use SSG?
https://www.code-sample.com/2024/01/angular-17-prerendering-static-site.html

What is Components DOM API and When to use DOM APIs in Components?
https://www.code-sample.com/2024/01/angular-17-components-dom-api-and-when.html

What is Component Inheritance and Extending other components and directives?
https://www.code-sample.com/2024/01/angular-17-component-inheritance.html

What are Component Lifecycle Hooks or Angular Lifecycle Hooks?
https://www.code-sample.com/2024/01/angular-17-component-lifecycle-hooks.html

What are Overriding LifeCycle methods?
https://www.code-sample.com/2024/01/angular-17-overriding-lifecycle-methods.html

What is ViewContainerRef to Render dynamic components?
https://www.code-sample.com/2024/01/angular-17-using-viewcontainerref-to.html

Angular 17 Tutorials:-
Install Angular 17 with Standalone (true):- https://youtu.be/Q4oDgwgc_zs
Angular 17 Routing For Beginners:- https://youtu.be/ebL7B5cq1cs
What Is Server-Side Rendering (SSR) and Why use?:- https://youtu.be/6d9Fx3mROY0
Angular 17 Component Inheritance:- https://youtu.be/SnSfvTugzzM
using ViewContainerRef To Render Dynamic Components:- https://youtu.be/8tRTmn-AWhE
Component Lifecycle Hooks:- https://youtu.be/AFWsRWnbC-Q
Prerendering Static Site Generation (SSG):- https://youtu.be/8b8deVyk3pw
Angular 17 for loop @for block Repeaters :- https://youtu.be/frNe5XVR9FA
Angular 17 if else statement example:- https://youtu.be/B8_ymr2x5Bk
What's New in Angular 17?:- https://youtu.be/1R4JMM2ORHM

Cross-Site Request Forgery (CSRF) Attack!

Anil Singh — Tue, 16 Jan 2024 10:10:36 +0000

How can you protect an Angular web app from cross-site request forgery attacks?
**
**Cross-Site Request Forgery (CSRF) is an attack where an unauthorized user can perform actions on behalf of an authenticated user without their consent.

To protect an Angular web app from CSRF attacks, you can follow these best practices:

Use CSRF Token in each HTTP request
Use HttpOnly and Secure Cookies
SameSite Cookie Attribute
You need to import HttpClientModule with HttpClientXsrfModule and configure it in your app module:

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

@NgModule({
imports: [
HttpClientModule,
HttpClientXsrfModule.withOptions({
cookieName: 'XSRF-TOKEN', // default
headerName: 'X-XSRF-TOKEN', // default
}),
],
})
export class AppModule {}

For more about - Angular 17 Overriding LifeCycle methods | Overriding vs Overloading
https://www.code-sample.com/2024/01/angular-17-overriding-lifecycle-methods.html

Caching HTML templates in Web Applications

Anil Singh — Tue, 16 Jan 2024 09:50:51 +0000

How can you cache HTML templates in web applications?

Caching HTML templates in web applications can significantly improve performance by reducing the need to fetch and render the same content repeatedly.

There are several ways to implement template caching:
1) Server-Side Caching- Utilize server-side caching mechanisms to store the rendered HTML templates.
2) Client-Side Caching- Leverage the browser's built-in caching mechanisms to store HTML templates on the client side.
3) Application-Level Caching- Implement application-level caching in your web application framework.
4) Content Delivery Network (CDN) - Use a Content Delivery Network to cache and distribute static assets, including HTML templates.
5) Optimize Server-Side Rendering (SSR)
6) *Template Compilation *- Pre-compile templates during the build process or server startup.
7) others as well

For more details about Caching HTML templates in Web Applications
https://www.code-sample.com/2024/01/caching-html-templates-in-web.html

How can you use UI animation to improve your web application's branding and identity?

Anil Singh — Tue, 16 Jan 2024 09:37:37 +0000

UI animation can play a crucial role in enhancing your web application's branding and identity by creating a more engaging and memorable user experience. Here are some ways you can leverage UI animation for this purpose:

1) Consistency with Branding Elements
2) Motion Design for Brand Personality
3) Interactive Onboarding
4) Loading and Transitions
5) Loading States and Progress Indicators
6) Performance Optimization
7) User Delight

Remember, the key is to strike a balance – animations should enhance the user experience without becoming distracting or overwhelming. Regularly gather user feedback to ensure that your animations align with your brand goals and resonate with your target audience.

My Tech blog - The Concepts Of Design Pattern - Questions and Answers (https://www.code-sample.com/2017/05/design-pattern-concepts-mvc-pattern.html)

Import data from Excel to SQL Server or Azure SQL Database | Convert Excel Files to Databases Quickly

Anil Singh — Fri, 12 Jan 2024 08:12:06 +0000

How to import data from an Excel file to a SQL Server database | Importing Data from Excel to SQL Server Database: Expert Tips

The quickest way to get your Excel file into SQL Server is by using the import wizard:

1) Open SSMS (SQL Server Management Studio) and connect to the database where you want to import your file.
2) Import Data: in SSMS in Object Explorer under 'Databases', right-click the destination database, and select Tasks, Import Data. An import wizard will pop up (you can usually just click Next on the first screen).
3) The next window is 'Choose a Data Source'. Select Excel: students
4) On the 'Choose a Destination' screen, select destination database:localdb
5) Next and next again and then Click to finish

How to insert data from Excel to SQL Server?
How can I import an Excel file into SQL Server?
Yes, there are several ways to import data from Excel. You may need to install SQL Server Management Studio (SSMS) to use some of these tools.

See on youtube video for this - https://youtu.be/hMlb024Recc

How to Create a database in SQL Server 2022?

Anil Singh — Fri, 12 Jan 2024 07:29:49 +0000

How to Create a Database in SQL Server | Database Table in MS SQL 2022 | SQL Server (SSMS)

Use SQL Server Management Studio To Create a database, Steps:

1) In Object Explorer, connect to an instance of the SQL Server Database Engine and then expand that instance.
2) Right-click Databases, and then select New Database.
3) In New Database, enter a database name.
4) To create the database by accepting all default values, select OK

https://youtu.be/58UXyfE5Uyc

Python Interview Questions and Answers | Beginners & Experienced

Anil Singh — Fri, 05 Jan 2024 10:04:03 +0000

Q1: What is Python?
A1: Python is a high-level, interpreted programming language known for its simplicity and readability. It supports multiple programming paradigms, including procedural, object-oriented, and functional programming.

Q2: What is the difference between Python 2 and Python 3?
A2: Python 3 is the latest version of the language, designed to fix and improve upon some of the shortcomings of Python 2. Python 3 introduced changes like print being a function, improved Unicode support, and various syntax enhancements. Python 2 is no longer actively supported.

Q3: Explain the concept of PEP 8.
A3: PEP 8 is the Python Enhancement Proposal that provides style guide recommendations for writing clean and readable code. It covers topics like indentation, naming conventions, and other aspects of coding style.

Q4: What are decorators in Python?
A4: Decorators are a powerful and flexible way to modify or extend the behavior of functions or methods without changing their code. They are denoted by the "@" symbol and are commonly used for tasks like logging, memoization, and access control.

Q5: What is a virtual environment in Python?
A5: A virtual environment is a self-contained directory that contains its own Python interpreter and installed libraries. It helps isolate project dependencies, preventing conflicts between different projects and simplifying package management.

Q6: Explain the difference between a shallow copy and a deep copy.
A6: A shallow copy creates a new object but doesn't create copies of nested objects; instead, it references the original objects. A deep copy, on the other hand, creates a new object and recursively copies all nested objects, creating independent copies.

Q7: What is the Global Interpreter Lock (GIL) in Python?
A7: The Global Interpreter Lock is a mechanism used in CPython (the default and most widely used implementation of Python) to synchronize access to Python objects, preventing multiple threads from executing Python bytecodes at once. This can impact the performance of multithreaded Python programs.

Q8: How does exception handling work in Python?
A8: Exception handling in Python is done using try, except, and finally blocks. Code that might raise an exception is placed inside the try block, and if an exception occurs, it's caught by the corresponding except block. The finally block, if present, is executed regardless of whether an exception occurred.

For Top 50 Python Interview Questions and Answers - Visit link https://www.code-sample.com/2017/12/python-interview-questions-and-answers.html

What's new features in Angular 17?

Anil Singh — Fri, 29 Dec 2023 04:02:33 +0000

Google team released the latest version of Angular – Angular 17 on November 6, 2023, creating a significant milestone for the front-end development.

Features and Updates:

Angular 17 is the highly anticipated release for the community, bringing many new exciting features, updates, and improvements.
New Syntax for Control Flow in Templates - new @if, @switch, @for, @case, @empty @end control flow syntax
Deferred Loading - @defer partial template
The Angular signals API
Angular SSR and client hydration
Automatic Migration to Build-in Control Flow
Build Performance with ESBuild
By default, set this newly generated component as a standalone, and now we don't have an app module file. To use (ng new angular17 --standalone=false) to get the app module file.
Got a new brand logo
Got a new dev documentation site
ng update: update existing applications to Angular 17 using ng update command
Super-Fast

The best new features of Angular 17 | Detail You should know about it!

What are the key differences between React and Angular?

Anil Singh — Thu, 28 Dec 2023 09:16:14 +0000

React and Angular are both popular JavaScript libraries/frameworks used for building web applications, but they have some key differences:

1. Architecture:
a. React: It's a library for building user interfaces. React is more focused on the view layer of the application. It allows developers to build components and manage the state of these components efficiently.
b. Angular: It's a full-fledged MVC framework. Angular provides a more opinionated structure for building applications, including a ready-made architecture with controllers, services, directives, etc.

2. Language:
a. React: It uses JSX (JavaScript XML), which is a syntax extension for JavaScript. JSX allows you to write HTML elements and components in a syntax that looks similar to XML or HTML.
b. Angular: It uses TypeScript, a superset of JavaScript that includes static typing and other features. TypeScript helps catch errors during development and provides better tooling support.

3. Data Binding:
a. React: It uses one-way data binding. Data flows in a single direction, from parent to child components
b. .Angular: It supports both one-way and two-way data binding. Two-way data binding allows automatic synchronization between the model and the view.

4. DOM Manipulation:
a. React: It uses a virtual DOM to optimize rendering by updating only the changed parts of the actual DOM.
b. Angular: It directly manipulates the real DOM, which may be less performant than React's virtual DOM in certain scenarios.

5. Size and Performance:
a. React: Generally considered more lightweight. Developers have the flexibility to choose and integrate additional libraries as needed.
b. Angular: The framework itself is larger due to its comprehensive features. It may have a steeper learning curve, but it provides more out-of-the-box functionality.

6. Community and Ecosystem:
React: It has a large and active community with a vast ecosystem of third-party libraries and tools.
Angular: Although it has a strong community, it might not be as large as React's. However, Angular comes with a more integrated ecosystem since it's a complete framework.

For detailed Interview Questions, visit this…
https://www.code-sample.com/2018/03/reactjs-interview-questions-and-answers.html

Ultimately, the choice between React and Angular depends on the specific needs and preferences of the development team and the project requirements.
Thank you,