React, Node.js, and Express Fundamentals

Component

Handles events; can be class or functional.

HTTP Status Code 200

Successful request with data returned.

HTTP Status Code 401

Unauthorized access due to invalid credentials.

HTTP Status Code 201

New resource successfully created.

Routes

Define URL structure and map requests.

package.json

Manages project metadata and dependencies.

require() Function

Imports modules or files into Node.js.

Route Handlers

Define server responses to specific HTTP requests.

Templates in Handlebars

Structure HTML with placeholders for data.

Partials in Handlebars

Reusable template fragments for consistency.

res.render()

Passes data from Express route to view.

Virtual DOM

Lightweight representation of the real DOM.

JSX

Syntax extension for JavaScript resembling HTML.

Functional Component

Stateless component using hooks for state management.

Class Component

Stateful component with its own internal state.

useState Hook

Manages state in functional components.

Props

Read-only data passed from parent to child.

State

Mutable data managed within a component.

useEffect Hook

Runs side effects like data fetching.

GET Method

Retrieves data from a specified resource.

POST Method

Creates a new resource on the server.

PUT Method

Updates an existing resource by ID.

DELETE Method

Removes a resource identified by ID.

HTTP Status Code 404

Requested resource not found.

HTTP Status Code 400

Bad request due to invalid data.

HTTP Status Code 204

Successful update with no content returned.

Model

Represents data and business logic.

View

Displays data and handles UI/UX.

Controller

Intermediary processing user inputs and views.

Node.js

JavaScript runtime for server-side execution.

Event-Driven Architecture

Handles asynchronous operations via event loop.

Express

Web framework for building Node.js applications.

Middleware

Functions that process requests and responses.

Handlebars

Templating engine for dynamic HTML generation.