DEV Community: Selvi Parasakthi K

RabbitMQ Tutorial for Beginners: Understanding Producer, Exchange, Queue, and Consumer

Selvi Parasakthi K — Sat, 03 Oct 2026 10:38:54 +0000

Modern applications are often built as a collection of independent services, and these services frequently need to communicate with each other.

For example, when a user places an order, the system may need to create the order, update inventory, send an email, and trigger a notification.

If all of these operations are handled synchronously within a single request, the application can become slower and the services become tightly coupled.

A message broker such as RabbitMQ helps solve this problem by allowing services to communicate asynchronously. Instead of directly calling another service, an application can publish a message to RabbitMQ, allowing the receiving service to process it independently.

What is RabbitMQ?

RabbitMQ is an open-source message broker. It allows different applications or services to communicate asynchronously by sending messages through a broker. Instead of one service directly calling another service, it can send a message to RabbitMQ and continue its work.

The main job of RabbitMQ is to:

Receive messages
Route them
Store them temporarily
Deliver them reliably to consumers

A simple RabbitMQ flow looks like this:

Producer → Exchange → Queue → Consumer

Think of RabbitMQ as a post office:
Producer → sends the letter
Exchange → decides where the letter should go
Queue → stores the letter
Consumer → receives and processes the letter

Why Do We Need RabbitMQ?

RabbitMQ enables loosely coupled services to communicate asynchronously, allowing tasks to be processed independently.

Some common benefits are:
Decoupling – services don't need to directly depend on each other.
Scalability – multiple consumers can process messages.
Reliability – messages can remain in a queue until they are processed.
Asynchronous processing – the producer doesn't have to wait for the consumer.
Load balancing – multiple consumers can share the workload.
Retry and Dead Letter support – failed messages can be handled separately.

Running RabbitMQ Locally with Docker

The easiest way to experiment with RabbitMQ is using Docker.

docker run -p 5672:5672 -p 15672:15672 rabbitmq:4-management

RabbitMQ uses:
5672 → Port used by applications to connect to RabbitMQ and exchange messages using AMQP
15672 → RabbitMQ Management UI

This gives you a web interface where you can view exchanges, queues, messages, connections, and other RabbitMQ information.

A simple local setup looks like this:

Your Application
      |
      | AMQP
      ↓
localhost:5672
      |
      ↓
RabbitMQ Docker Container
      |
      └── Management UI
             ↓
       localhost:15672

The Core RabbitMQ Concepts

To understand RabbitMQ, you mainly need to understand these concepts:

Producer
Exchange
Queue
Binding
Consumer
Channel
Connection
Virtual Host

Let's understand them one by one.

1. Producer

A producer is an application or service that publishes messages to RabbitMQ.

Instead of sending a message directly to a queue, the producer sends it to an exchange. The exchange then uses its routing rules to determine which queue or queues should receive the message.

The producer provides information such as:

Exchange name
Routing key
Message body
Message properties

Example:

channel.publish(
  'order_exchange',
  'order.created',
  Buffer.from(JSON.stringify({
    orderId: 101,
    user: 'Selvi'
  })),
  { persistent: true }
);

The application usually converts structured data such as JSON into bytes before sending it.

2. Exchange

An exchange is the router of RabbitMQ. It receives messages from producers and decides which queue or queues should receive them.

Producer
   |
   ↓
Exchange
   |
   ├──→ Queue A
   ├──→ Queue B
   └──→ Queue C

RabbitMQ provides different types of exchanges, each using a different routing strategy to determine which queues should receive a message.

Exchange Type	Routing Strategy	Typical Use
Direct	Routes messages using an exact routing-key match	Send a message to a specific queue
Fanout	Routes messages to all queues bound to the exchange	Broadcasting messages
Topic	Routes messages based on routing-key patterns	Flexible event-based routing
Headers	Routes messages based on message headers	Advanced routing scenarios

Example:
A topic exchange uses routing-key patterns to determine where messages should be delivered.

For example, an application might publish events such as:

order.created
order.updated
order.cancelled

3. Queue

A queue is a FIFO buffer that stores messages until a consumer processes them.

A message stays in the queue until it is:

Acknowledged by a consumer
Expired (TTL)
Removed because the queue is deleted

When creating a queue, RabbitMQ provides several properties that control how the queue behaves and how long it remains available.

Property	Description
`durable`	Keeps the queue available after a RabbitMQ broker restart.
`exclusive`	Restricts the queue to the connection that created it.
`autoDelete`	Automatically deletes the queue when it is no longer being used.
`TTL`	Defines how long messages can remain before they expire.
`DLX`	Specifies the Dead Letter Exchange used for messages that cannot be processed successfully.

For example, the following creates a durable queue that is not exclusive and is not automatically deleted:

await channel.assertQueue('orderQueue', {
  durable: true,
  exclusive: false,
  autoDelete: false
});

Here, orderQueue will remain available even after the RabbitMQ broker restarts.

4. Binding

A binding defines the relationship between an exchange and a queue. It tells RabbitMQ how messages should be routed from an exchange to a specific queue.

For example:

channel.bindQueue(
  'emailQueue',
  'order_exchange',
  'order.email'
);

This binding tells RabbitMQ:

When a message is published to order_exchange with the routing key order.email, route it to emailQueue.

For example:

Producer
   |
   | Routing Key: order.email
   ↓
order_exchange
   |
   ↓
emailQueue

An exchange can also be connected to multiple queues, each with its own routing rule:

              Exchange
                 |
       ┌─────────┼─────────┐
       ↓         ↓         ↓
    Queue A   Queue B   Queue C

This flexible routing mechanism allows different consumers to receive only the messages they are interested in.

5. Consumer

A consumer is an application or service that receives messages from a queue and processes them.

Once the consumer successfully processes a message, it sends an acknowledgement (ACK) to RabbitMQ. This tells RabbitMQ that the message has been handled successfully.

For example:

channel.consume('orderQueue', (msg) => {
  const order = JSON.parse(msg.content.toString());
  console.log('Processing order:', order.orderId);
  channel.ack(msg);
});

The basic flow is:

Queue
  ↓
Consumer receives message
  ↓
Process the message
  ↓
ACK
  ↓
RabbitMQ removes the message

ACK and NACK

Acknowledgements are an important part of RabbitMQ's reliability mechanism.

Operation	Meaning	RabbitMQ behavior
`channel.ack(msg)`	Message processed successfully	Removes the message
`channel.nack(msg, false, true)`	Processing failed, retry	Requeues the message
`channel.nack(msg, false, false)`	Processing failed, do not retry	Discards it or routes it to a DLQ
Consumer crashes before ACK	Message was not completed	Message becomes available again

Manual Acknowledgement

For reliable message processing, manual acknowledgement is generally preferred.

With manual acknowledgement, RabbitMQ waits for the consumer to explicitly confirm that the message was successfully processed.

If the consumer crashes before sending an ACK, RabbitMQ can make the message available for processing again.

With automatic acknowledgement, RabbitMQ considers the message successfully handled as soon as it is delivered to the consumer. If the application crashes while processing the message, that message may be lost.

So, the important idea is:

ACK means "I successfully processed this message." NACK means "I could not process this message."

Dead Letter Queue (DLQ)

What happens when a message repeatedly fails to process?

Continuously retrying the same message can block processing, while simply discarding it can result in data loss.

RabbitMQ provides Dead Letter Exchanges (DLX) to handle such messages. When a message cannot be successfully processed, it can be routed through a DLX to a Dead Letter Queue (DLQ).

The DLQ allows failed messages to be stored separately so they can be inspected, investigated, or reprocessed later.

The flow looks like this:

Main Queue
    |
    | Processing fails
    ↓
Dead Letter Exchange (DLX)
    |
    ↓
Dead Letter Queue (DLQ)

For example:

await channel.assertQueue('mainQueue', {
  arguments: {
    'x-dead-letter-exchange': 'dlx_exchange',
    'x-dead-letter-routing-key': 'dead.msg',
  },
});

await channel.assertQueue('dlqQueue');

await channel.bindQueue(
  'dlqQueue',
  'dlx_exchange',
  'dead.msg'
);

Here, mainQueue is configured with a Dead Letter Exchange. Messages that are dead-lettered are routed through dlx_exchange and delivered to dlqQueue.

This provides a safer way to handle messages that cannot be processed successfully without silently losing them.

6. Channel

A channel is a lightweight virtual connection inside a TCP connection.

Creating TCP connections is relatively expensive, so applications can create multiple channels over one connection.

For example:

Application
     |
 TCP Connection
     |
 ┌───┼────────┐
 ↓   ↓        ↓
Ch1  Ch2      Ch3

Channels can be used for:

Publishing messages
Consuming messages
Declaring queues
Managing RabbitMQ resources

7. Connection

A connection is the actual TCP connection between your application and RabbitMQ.

For example:

amqp://localhost:5672

The application connects to RabbitMQ using the AMQP protocol.

One RabbitMQ server can have connections from many different applications.

8. Virtual Host (vHost)

A virtual host is a logical namespace inside RabbitMQ.

Each vHost can have its own:

Exchanges
Queues
Bindings
Permissions
For example:

RabbitMQ
│
├── /dev
│    ├── queues
│    └── exchanges
│
└── /prod
     ├── queues
     └── exchanges

This is useful when separating environments or tenants.

You can think of a vHost somewhat like a separate logical database inside a database system.

What is AMQP?

AMQP (Advanced Message Queuing Protocol) is a messaging protocol used by RabbitMQ to define how applications and the broker communicate.

Similar to how HTTP defines communication between web clients and servers, AMQP defines how messages are published, routed, delivered, and acknowledged between producers, RabbitMQ, and consumers.

For example, when a producer publishes a message, RabbitMQ uses AMQP to handle information such as:

Which exchange should receive the message
Which routing key should be used
Message properties and payload
How the message is delivered to consumers
How acknowledgements are handled

At a lower level, these operations are transmitted as AMQP frames over a TCP connection.

In simple terms:

AMQP is the communication protocol that defines how your application and RabbitMQ exchange messages.

Conclusion

RabbitMQ becomes much easier to understand once the core message flow is clear:

Producer → Exchange → Queue → Consumer

From there, concepts such as bindings, routing keys, acknowledgements, retries, Dead Letter Queues, channels, connections, and vHosts fit naturally into the overall architecture.

This article covers the fundamentals I learned while exploring RabbitMQ. I hope it helps anyone who is getting started with message brokers and asynchronous communication.

If you have any questions, suggestions, feel free to share them in the comments. I'd be happy to learn and discuss with you!

How to Use React Components Inside Angular (Step-by-Step Guide)

Selvi Parasakthi K — Tue, 31 Mar 2026 08:10:42 +0000

In real-world projects, teams often work with multiple frameworks like React and Angular.

But what if you already built a component in React and want to reuse it inside an Angular application?

👉 Do you need to rewrite everything?
👉 Or is there a smarter way?

Good news: You can directly use React components inside Angular using Web Components.

In this blog, I’ll walk you through a step-by-step process with clear explanations, so even if you try this for the first time, it will work.

🧠 Understanding the Idea First

Before jumping into code, let’s understand what we are doing.

React components are not directly compatible with Angular because:

React uses a Virtual DOM
Angular uses its own template system

So they don’t “talk” to each other natively.

💡 Solution: Web Components

Web Components are browser-native custom HTML elements.

Example:

<random-picker></random-picker>

Once we convert a React component into a Web Component:

Angular treats it like a normal HTML tag
No framework conflict
Fully reusable

🛠 Step 1: Create a React Project

We’ll first build our React component separately.

npm create vite@latest random-picker
cd random-picker
npm install

👉 Why Vite?

Fast build tool
Simple configuration
Perfect for creating reusable components

📦 Step 2: Install r2wc

We use a library to convert React → Web Component.

npm install @r2wc/react-to-web-component

👉 Why this library?

Normally, converting React into a Web Component requires a lot of manual work.

This package:

Wraps your React component
Handles lifecycle
Maps props automatically

⚛️ Step 3: Create a Simple React Component

Now let’s create a clean and minimal component (no CSS, so beginners can focus on logic).

// src/components/RandomPicker.tsx

import { useState } from "react";

type Props = {
  items?: string[];
  title?: string;
  onResult?: (value: string) => void;
};

export default function RandomPicker({
  items = [],
  title = "Pick one",
  onResult,
}: Props) {
  const [result, setResult] = useState("");

  // Function to pick a random item
  const pick = () => {
    if (!items.length) return;

    const randomItem =
      items[Math.floor(Math.random() * items.length)];

    setResult(randomItem);

    // send result back (optional)
    onResult?.(randomItem);
  };

  return (
    <div>
      <h3>{title}</h3>
      <button onClick={pick}>Pick Random</button>
      {result && <p>Result: {result}</p>}
    </div>
  );
}

🧩 What’s happening here?

items → list of values
title → heading
onResult → callback function
pick() → selects a random item

This is just a normal React component.

🔁 Step 4: Convert React to Web Component

Now comes the important part - converting your React component into something Angular can understand.

// src/random-picker-wc.ts

import r2wc from "@r2wc/react-to-web-component";
import RandomPicker from "./components/RandomPicker";

const RandomPickerWC = r2wc(RandomPicker, {
  props: {
    items: "json",
    title: "string",
    onResult: "function",
  },
});

// Register as HTML element
customElements.define("random-picker", RandomPickerWC);

🔍 Deep Explanation

📌 React → Angular Compatibility Problem

React and Angular are built on completely different architectures:

React uses a Virtual DOM
Angular uses template-driven rendering

Because of this difference, Angular cannot directly render a React component.
To make them work together, we need a framework-independent layer — this is where Web Components come in.

📌 Role of `r2wc()`

The r2wc function acts as a bridge between React and the browser.

It wraps your React component
Converts it into a native Custom Element
Handles mounting, updating, and unmounting internally

After this conversion, your React component behaves like a normal HTML tag.

👉 In simple terms:

React Component → Web Component → Usable in Angular

📌 Why We Define `props`

Web Components don’t receive JavaScript props like React.
They receive HTML attributes, which are always strings.

So we must explicitly define how each prop should be interpreted.

props: {
  items: "json",
  title: "string",
  onResult: "function",
}

📌 Understanding Each Prop Type

json
- Used when passing arrays or objects
- Converts string → actual JavaScript data
- Example: "['Apple','Mango']" → ["Apple","Mango"]
string
- Used for simple text values
- Passed directly without transformation
function
- Used for callbacks/events
- Enables communication from React → Angular

📌 Role of `customElements.define()`

customElements.define("random-picker", RandomPickerWC);

This step registers your component in the browser.

After registration:

<random-picker> becomes a valid HTML element
It can be used anywhere (Angular, HTML, etc.)

Without this step:

The browser will not recognize your component
Nothing will render

Now the browser understands this element.

⚡ Step 5: Build React Project (Using vite)

Instead of doing a normal build, we configure Vite to generate a reusable Web Component bundle.

🧩 Create Vite Config

// vite.config.ts

import { defineConfig } from "vite";
import react from "@vitejs/plugin-react";

export default defineConfig({
  plugins: [react()],
  build: {
    lib: {
      entry: "src/random-picker-wc.ts",
      name: "RandomPicker",
      fileName: "random-picker",
      formats: ["es"],
    },
    cssCodeSplit: false,
  },
});

npm run build

This generates a file inside the dist folder:

dist/random-picker.js

👉 This file contains your Web Component ready to use in Angular.

🅰️ Step 6: Setup Angular Project

ng new angular-app
cd angular-app

🔗 Step 7: Load React Script in Angular

Open angular.json

Add your React build file:

"scripts": [
  "src/assets/random-picker.js"
]

Make sure you copy random-picker.js from the React dist folder into Angular src/assets/

👉 Why this step?

Angular doesn’t know about your React component.
So we manually load the script globally.

⚠️ Step 8: Enable Custom Elements in Angular

Angular throws an error for unknown HTML tags.

To fix that:

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

@Component({
  selector: 'app-root',
  templateUrl: './app.html',
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class App {}

👉 Why?

This tells Angular:

“Don’t complain about unknown elements — I know what I’m doing.”

🧩 Step 9: Use React Component in Angular

Now you can use your React Web Component just like a normal HTML element in Angular.

<random-picker
  title="Fruits Picker"
  [attr.items]="'[\"Apple\",\"Mango\",\"Orange\"]'"
></random-picker>

🎉 Final Result

Now your Angular app renders a React component 🎯

React logic runs inside
Angular displays it
Both work together seamlessly

🧾 Summary (What You Learned)

React and Angular are not directly compatible
Web Components act as a bridge
r2wc simplifies conversion
Angular can consume custom elements easily

🔥 When Should You Use This?

This approach is perfect when:

You want to reuse React components
Multiple teams use different frameworks
You are building a shared component library

⚠️ Common Mistakes

❌ Forgetting CUSTOM_ELEMENTS_SCHEMA
❌ Not adding script in angular.json
❌ Passing objects instead of JSON string

🙌 Final Thoughts

This technique is extremely powerful.

Once you understand this pattern, you can:
👉 Use React components inside Angular applications
👉 Reuse UI across different projects and frameworks
👉 Build framework-independent UI libraries

If this helped you, feel free to ❤️ and share!

Happy coding 🚀

How to Use Styled Components in React with Dynamic Props (Beginner Friendly Guide)

Selvi Parasakthi K — Sun, 22 Feb 2026 15:05:16 +0000

When building modern React applications, styling plays a major role in making the UI dynamic and reusable.

Instead of writing separate CSS files, Styled Components allows us to write actual CSS inside JavaScript and also apply styles dynamically using props.

In this blog, let's learn

What is styled-components
How to install styled-components
How styled-components work
How to pass dynamic props
How to style UI based on props like
- Background color
- Text Color
- Border Radius
- Image
- Shape
- Shadow

1. What is styled-component

Styled Components is a CSS-in-JS library that allows developers to write CSS directly inside JavaScript. It helps in creating reusable styled UI components while also enabling dynamic styling through props.

By using Styled Components, we can avoid class name conflicts and maintain a clean, component-based styling approach within our React applications.

2. Install Styled Components Package

First, install the required packages:

npm install styled-components
npm install --save-dev @types/styled-components

3. How styled-component work

Example:

import styled from "styled-components";

export const Title = styled.h1`
  color: blue;
`;

Now Title becomes a styled React component which we can use like:

<Title>Hello World</Title>

4. Dynamic Styling Using Props

The real power of styled-components comes when we pass props.
We can change the UI dynamically based on user input or state values.

5. Creating a Dynamic Card Component

Let’s create a profile card where:

Background color is dynamic
Text color is dynamic
Border radius is dynamic
Shadow is toggleable

Step 1: Create Styled Card

export const Card = styled.div<{
  bg: string;
  textColor: string;
  radius: number;
  shadow: boolean;
}>`
  width: 300px;
  padding: 20px;
  text-align: center;

  background: ${({ bg }) => bg};
  color: ${({ textColor }) => textColor};
  border-radius: ${({ radius }) => radius}px;

  transition: 0.3s;

  ${({ shadow }) =>
    shadow &&
    `
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  `}
`;

Passing Image as Background
Instead of using an <img/> tag, we can also apply image dynamically as a background.

Step 2: Create Avatar Component

export const Avatar = styled.div<{
  shape: string;
  image: string;
}>`
  width: 100px;
  height: 100px;

  border-radius: ${({ shape }) =>
    shape === "circle" ? "50%" : "12px"};

  background: url(${props => props.image})
    center/cover no-repeat;
`;

Here:

image→ Dynamic image URL
shape → Circle or square avatar

Using Styled Components in React
Now let’s pass these props from our React component.

Step 3: Profile Card Component

type Props = {
  name: string;
  role: string;
  bg: string;
  textColor: string;
  radius: number;
  shadow: boolean;
  shape: string;
  image: string;
};

export default function ProfileCard(props: Props) {
  return (
    <Card
      bg={props.bg}
      textColor={props.textColor}
      radius={props.radius}
      shadow={props.shadow}
    >
      <Avatar
        shape={props.shape}
        image={props.image}
      />

      <h2>{props.name}</h2>
      <p>{props.role}</p>
    </Card>
  );
}

Passing Values from State
We can now control the styles dynamically using React state.

<ProfileCard
  name="John Doe"
  role="Frontend Developer"
  bg="#ffffff"
  textColor="#000000"
  radius={12}
  shadow={true}
  shape="circle"
  image="https://i.pravatar.cc/100"
/>

Now:

Changing bg will change background color
Changing textColor will update text
Changing radius will update card shape
Changing shape will update avatar
Changing image will update avatar background All UI updates dynamically ✨

🚀 Conclusion

Styled Components helps us:

Keep styling close to components
Create reusable UI
Apply styles dynamically
Build interactive UI easily
Maintain clean code structure Using props, we can control the complete UI styling from React state without writing separate CSS files.

🚀Understanding Webpack: A begineer friendly Guide with Examples

Selvi Parasakthi K — Sat, 15 Nov 2025 09:19:02 +0000

Webpack is one of the most powerful tools in modern JavaScript development. If you're building a front-end application, you've almost certainly seen it in action—even if you didn't notice it.

This blog breaks down what Webpack does, why it matters, and how to set up a basic Webpack configuration with loaders, CSS/SASS support, and JS minification.

What is Webpack?

Webpack is a static module bundler for modern JavaScript applications.
When Webpack processes your application, it creates an internal dependency graph starting from one or more entry points—then bundles all modules (JS, CSS, images, etc.) into one or more optimized files.

In simple words:

✅ Webpack bundles your project's files (JS, CSS, images…)
into fewer, optimized files so your application loads faster.

Sample Project Setup

Reference repository:
👉https://github.com/Selvi-Parasakthi-K/webpack-practice

1. Initialize the Project

Create a package.json file:

npm init -y

Install Webpack and Webpack CLI:

npm i webpack webpack-cli --save-dev

Add "build": "webpack" in the scripts section, so running npm run build will trigger Webpack.

"scripts": {
  "build": "webpack"
}

2. Create webpack.config.js

const path = require("path");

module.exports = {
  entry: "./src/index.js",
  output: {
    filename: "bundle.js",
    path: path.resolve(__dirname, "./dist"),
  },
  mode: "none",
};

This tells webpack:

entry → starting file of your app
output → where to store bundled files
mode → can be "development", "production", or "none"

Loaders in Webpack

Loaders allow Webpack to handle non-JavaScript files like images, CSS, and SASS.

Think of loaders as translators—Webpack doesn’t understand images or CSS by default, so loaders help convert them into modules.

Image Loader Example

Install file-loader:

npm i file-loader --save-dev

Add loader rule:

module: {
  rules: [
    {
      test: /\.(jfif|png)$/,
      use: ["file-loader"],
    },
  ],
}

Setting the Public Path

Public path tells Webpack where the final bundled files (like images) will be loaded from in the browser. It basically sets the base URL for all assets so the browser knows the correct location to fetch them.

output: {
  filename: "bundle.js",
  path: path.resolve(__dirname, "./dist"),
  publicPath: "./dist/",
},

This ensures images get the correct URL in the final bundle.

Adding CSS Support

Install these loaders:

css-loader → lets Webpack understand CSS files
style-loader → injects CSS into the browser

Order matters → loaders run from right to left

{
  test: /\.css$/,
  use: ["style-loader", "css-loader"], 
}

If reversed, Webpack will fail.

Adding SASS/SCSS Support

Install:

npm i sass sass-loader style-loader css-loader --save-dev

Add the rule:

{
  test: /\.scss$/,
  use: [
    "style-loader",
    "css-loader",
    {
      loader: "sass-loader",
      options: {
        implementation: require("sass"),
      },
    },
  ],
}

Plugins in Webpack

Plugins in Webpack allow you to perform extra tasks during the build process—like optimizing, minifying, or transforming files—that go beyond what loaders can do.

Minifying JavaScript (Production Optimization)

Use terser-webpack-plugin to minify JS.

Install:

npm install terser-webpack-plugin --save-dev

Add to your config:

const path = require("path");
const TerserPlugin = require("terser-webpack-plugin");

module.exports = {
  entry: "./src/index.js",
  output: {
    filename: "bundle.js",
    path: path.resolve(__dirname, "./dist"),
    publicPath: "./dist/",
  },
  mode: "none",
  module: {
    rules: [],
  },
  plugins: [new TerserPlugin()],
};

This reduces file size and improves performance.

🎯 Conclusion

Webpack may look complex at first, but once you understand the basics—entry, output, loaders, and plugins—it becomes an incredibly powerful tool.

With this setup, you can:

✔ Bundle JavaScript
✔ Load images
✔ Add CSS & SASS support
✔ Minify and optimize output

You now have a complete Webpack setup suitable for any small or medium JavaScript project!

DEV Community: Selvi Parasakthi K

RabbitMQ Tutorial for Beginners: Understanding Producer, Exchange, Queue, and Consumer

What is RabbitMQ?

Why Do We Need RabbitMQ?

Running RabbitMQ Locally with Docker

The Core RabbitMQ Concepts

1. Producer

2. Exchange

3. Queue

4. Binding

5. Consumer

Dead Letter Queue (DLQ)

6. Channel

7. Connection

8. Virtual Host (vHost)

What is AMQP?

Conclusion

How to Use React Components Inside Angular (Step-by-Step Guide)

🧠 Understanding the Idea First

💡 Solution: Web Components

🛠 Step 1: Create a React Project

👉 Why Vite?

📦 Step 2: Install r2wc

👉 Why this library?

⚛️ Step 3: Create a Simple React Component

🧩 What’s happening here?

🔁 Step 4: Convert React to Web Component

🔍 Deep Explanation

📌 React → Angular Compatibility Problem

📌 Role of r2wc()

📌 Why We Define props

📌 Understanding Each Prop Type

📌 Role of customElements.define()

⚡ Step 5: Build React Project (Using vite)

🅰️ Step 6: Setup Angular Project

🔗 Step 7: Load React Script in Angular

👉 Why this step?

⚠️ Step 8: Enable Custom Elements in Angular

👉 Why?

🧩 Step 9: Use React Component in Angular

🎉 Final Result

🧾 Summary (What You Learned)

🔥 When Should You Use This?

⚠️ Common Mistakes

🙌 Final Thoughts

How to Use Styled Components in React with Dynamic Props (Beginner Friendly Guide)

1. What is styled-component

2. Install Styled Components Package

3. How styled-component work

4. Dynamic Styling Using Props

5. Creating a Dynamic Card Component

Step 1: Create Styled Card

Step 2: Create Avatar Component

Step 3: Profile Card Component

🚀 Conclusion

🚀Understanding Webpack: A begineer friendly Guide with Examples

What is Webpack?

Sample Project Setup

Loaders in Webpack

Image Loader Example

Setting the Public Path

Adding CSS Support

Adding SASS/SCSS Support

Plugins in Webpack

Minifying JavaScript (Production Optimization)

🎯 Conclusion

📌 Role of `r2wc()`

📌 Why We Define `props`

📌 Role of `customElements.define()`