Forem: Syed Muhammad Ali Raza

React Interview Prep: 50+ Problems Every Frontend Dev Should Know

Syed Muhammad Ali Raza — Fri, 31 Oct 2025 09:48:49 +0000

If I’m testing your React knowledge in a Frontend interview, I’m definitely going to ask 1–2 questions out of these 50+ problems (collected over my 12+ years of exp.)

These cover everything :
→ Component design and reusability
→ State management and hooks
→ Handling user interactions and events
→ Accessibility and ARIA roles
→ Optimizing rendering and performance
→ Working with external data and APIs

➥UI/Component Building

Memory Game
Image Carousel
Image Carousel II (smooth transitions)
Digital Clock
Analog Clock
Whack-A-Mole
Tic-tac-toe
Tic-tac-toe II (N x N, variable win condition)
Connect Four
Modal Dialog
Modal Dialog II (ARIA roles, semi-accessible)
Modal Dialog III (common close methods, moderately accessible)
Accordion II (accessible, ARIA support)
Accordion III (full keyboard support, ARIA)
Tabs
Tabs II (semi-accessible)
Tabs III (keyboard/ARIA spec)
Star Rating
Like Button
Progress Bars III (multiple concurrent, pause/resume)
Progress Bars II (sequential fill, one at a time)
Grid Lights
Traffic Light
Data Table
Data Table II (sorting)
Data Table III (pagination, sorting)
Data Table IV (pagination, sorting, filtering)
Nested Checkboxes (parent-child selection logic)
File Explorer
File Explorer II (ARIA roles, semi-accessible)
File Explorer III (flat DOM)
Table of Contents (HTML parsing, tree)
Selectable Cells (drag-select grid)
Auth Code Input (6-digit entry)
Modal Dialog IV (fully accessible, keyboard support)
Undoable Counter (undo/redo)
Pixel Art (drawing grid)
Todo List

➥Logic/Algorithmic & Data Handling

Birth Year Histogram (API + plotting)
Job Board (API data + rendering)
Transfer List
Transfer List II (bulk select, add, transfer)
Users Database (CRUD)
Dice Roller
Backbone Model (custom object store)
Data Selection (filtering)
getElementsByTagNameHierarchy (DOM queries)
Curry III (JS currying logic)
Classnames II (join/dedupe classnames)
Heap (implement data structure)
Heap Operations
End of Array Reachable (jump game)
Find the Longest Palindromic Substring
Find Words in Grid
Find Word in Grid (existence check)
Shortest Substring Containing Characters
Disjoint Intervals (remove overlaps)
Minimum Meeting Rooms Needed
Graph Clone (deep copy graph)
Binary Tree Serialization and Deserialization
Binary Tree Maximum Total Path
Binary Tree Rebuilding from Preorder/Inorder
Graph Count Connected Components
Number Stream Median
Linked Lists Combine K Sorted

➥Custom Hooks

useDebounce
useEventListener
useHover
useInterval
useKeyPress
useMap
useObject
useSet
useStep
useThrottle
useTimeout
useWindowSize
useIdle
useInputControl
useMediaQuery
useMediatedState
useQuery
useArray
useBreakpoint
useClickOutside
useCountdown

If you can build, debug, and explain at least half of these, you’re already ahead of 90% of candidates.

Frontend Challenge - Halloween Edition

Syed Muhammad Ali Raza — Fri, 31 Oct 2025 06:55:40 +0000

This is a submission for Frontend Challenge - Halloween Edition, Perfect Landing

What I Built

I built the Spooky Heritage Museum landing page—an interactive experience that takes visitors through Halloween’s history. The page includes:
Animated Hero Section: Full-screen intro with a glowing moon, twinkling stars, floating ghosts, and bats flying across. Typography uses the "Creepster" font.

Interactive Timeline: A vertical timeline showing Halloween’s evolution from ancient Celtic Samhain to modern trick-or-treating. Timeline items animate into view on scroll and alternate left/right.
Exhibit Showcase: Four featured exhibits with hover lift/glow effects. Clicking opens modal dialogs (replacing alerts).
Events Section: Calendar-style event cards for upcoming activities like midnight ghost tours and pumpkin carving workshops.
Reservation System: A validated form with real-time email, date, and guest limit checks, plus clear error messages.

The design uses a purple-to-orange gradient with dark backgrounds that make orange accents pop, plus yellow highlights for a warm, candlelit feel.

Demo

Demo Link
https://github.com/Syed-Muhammad-Ali-Raza/Halloween-Landing-Challenge-

Journey

The Concept

I started with the museum theme because museums are about discovery, and Halloween has a rich, often untold history. I wanted storytelling and education, not just scares.

Challenges & Solutions

Smooth animations: The floating ghosts and bats needed randomness. I varied animation durations and delays per element and used transforms for organic arcs instead of straight lines.
Timeline layout: Alternating left/right on desktop, stacking on mobile took careful positioning. CSS Grid and Flexbox handled it, but getting margins right required multiple iterations.
Form validation: HTML5 validation wasn’t enough. I added real-time validation with inline error messages, ARIA attributes, and visual states (green for valid, red for errors). The date picker sets today as the minimum automatically.

What I'm Proud Of

Accessibility: Skip links, ARIA labels, keyboard navigation, focus indicators, and prefers-reduced-motion support.
Mobile menu: Hamburger-to-X transition with staggered menu item animations.
Modals: Replaced alerts with accessible modals that fade in, trap focus, and close on Escape or outside click.
Performance: Vanilla JavaScript with IntersectionObserver for scroll animations—fast and smooth.

Tech Stack

Pure HTML, CSS, and vanilla JavaScript—no build process. CSS Custom Properties make theme tweaks easy, and Grid/Flexbox handle layouts. backdrop-filter adds frosted glass effects with graceful degradation.

Frontend Challenge - Halloween Edition

Syed Muhammad Ali Raza — Fri, 31 Oct 2025 06:08:03 +0000

This is a submission for Frontend Challenge - Halloween Edition, CSS Art.

Inspiration

Classic Halloween imagery inspired this scene:

Haunted Victorian houses with flickering candlelit windows
Jack-o-lanterns with glowing faces
Bats in the night sky
Floating ghosts
Graveyards with tombstones
Moonlit nights

Demo

https://codepen.io/Syed-Muhammad-Ali-Raza/pen/YPwOMbP
For complete code you can check out this Github repo
https://github.com/Syed-Muhammad-Ali-Raza/Halloween-Challenge

Journey

Started with a layout plan, then built elements from back to front:

sky
house
pumpkin
ghost
bats
tombstones

Using clip-path for complex shapes (pumpkin face features)
Layering gradients and radial gradients for lighting
Coordinating multiple animations with different delays
and durations Pseudo-elements (::before, ::after)
for details Transform and animation keyframes for movement

GitHub repos that will make you a 10x software engineer: 1 Vision agent https://lnkd.in/e-ZHJTqc 2 System design https://lnkd.in/e7SUQ3ei 3 Public APIs https://lnkd.in/epWSyzqs 4 Tech interview handbook https://lnkd.in/e7EjsJNF

Syed Muhammad Ali Raza — Thu, 23 Oct 2025 13:38:04 +0000

GitHub - GetStream/Vision-Agents: Open Vision Agents by Stream. Build Vision Agents quickly with any model or video provider. Uses Stream's edge network for ultra-low latency.

Open Vision Agents by Stream. Build Vision Agents quickly with any model or video provider. Uses Stream's edge network for ultra-low latency. - GetStream/Vision-Agents

lnkd.in

This link will take you to a page that’s not on LinkedIn

lnkd.in

This link will take you to a page that’s not on LinkedIn

lnkd.in

This link will take you to a page that’s not on LinkedIn

lnkd.in

JavaScript feels tricky until you master its language. Once you truly understand these core words, the rest becomes 10x easier. Strong concepts = Clean code = Confident developer. What was the one JavaScript term that finally clicked for you?

Syed Muhammad Ali Raza — Thu, 18 Sep 2025 13:08:33 +0000

Frontend Developer Roadmap for Junior & Senior Developer's

Syed Muhammad Ali Raza — Mon, 16 Dec 2024 17:04:29 +0000

♣ Frontend Developer Roadmap For Junior Developers:

🧩 Phase 1: Foundations of Frontend Development

HTML, CSS, JavaScript
- Semantic HTML
- Modern CSS (Flexbox, Grid, Variables)
- JavaScript ES6+ features (let/const, classes, async/await)
DOM Manipulation
- Event handling and propagation
- Working with the DOM API
- Basic performance considerations
Version Control
- Git basics (branching, merging, pull requests)
- Working with GitHub/GitLab/Bitbucket

🧩 Phase 2: UI Development and Design

CSS Frameworks & Preprocessors
- TailwindCSS, Bootstrap, SASS/SCSS
Responsive Design
- Media queries
- Mobile-first vs Desktop-first design
Component-Based Architecture
- Introduction to React, Vue, or Angular
- Building reusable components
- State and props management

🧩 Phase 3: Data Fetching and APIs

HTTP Basics
- REST APIs, GraphQL basics
- Fetch API and Axios for API requests
State Management
- Local state (useState, Vue's data)
- Context API for global state
Error Handling
- Basic error handling and retries
- Loading and error states in the UI

🧩Phase 4: Performance Optimization

Web Performance Metrics
- Core Web Vitals (LCP, FID, CLS)
Asset Optimization
- Image compression and lazy loading
- Minification of CSS/JS
Rendering Basics
- Client-Side Rendering (CSR)
- Understanding rendering lifecycle in React/Vue

🧩Phase 5: Security Basics

Common Vulnerabilities
- XSS (Cross-Site Scripting)
- CSRF (Cross-Site Request Forgery)
- CORS (Cross-Origin Resource Sharing)
Best Practices
- Secure cookies and basic HTTP headers
- Sanitizing user input

🧩Phase 6: Testing and Debugging

Debugging Tools
- Chrome DevTools basics
Unit Testing
- Introduction to Jest, Mocha, or Jasmine
Basic Monitoring
- Browser console logs
- Simple crash/error reports

🧩 Phase 7: Build Tools and Deployment

Tooling
- NPM/Yarn package managers
- Introduction to bundlers like Webpack, Vite, or Parcel
Deployment
- Hosting with Vercel, Netlify, or GitHub Pages
- CI/CD basics
Junior Engineers: Focus on mastering the basics, frameworks, and deployments. Build confidence in delivering small to medium features.
Senior Engineers: Dive deep into architecture, testing, performance optimization, and scalability while mentoring others.

🔥 Roadmap For Senior Frontend Engineers

🧩 Phase 1: Advanced JavaScript and Frameworks

Deep Dive into JavaScript
- Closures, hoisting, event loop, and prototypes
- Performance optimization (Debouncing, Throttling)
Advanced Framework Knowledge
- React: Advanced hooks, memoization, error boundaries
- Vue: Vuex/Pinia state management
- Angular: Dependency Injection and RxJS
Server-Side Rendering (SSR)
- Next.js for React
- Nuxt.js for Vue

🧩 Phase 2: Architecture and State Management

State Management at Scale
- Redux, Zustand, Recoil (React)
- Pinia/Vuex (Vue)
- Understanding global vs local state
Component Architecture
- Container vs Presentational components
- Design Systems and reusable libraries
API Handling
- GraphQL basics and Apollo Client
- Error boundaries, retries, and fallbacks

🧩 Phase 3: Performance Optimization

Core Web Vitals
- LCP, FID, CLS
- Code splitting and lazy loading
Optimization Techniques
- Bundle analysis and tree shaking
- Server-Side Rendering and pre-rendering
Advanced Rendering Concepts
- Virtual DOM, reconciliation
- Concurrent rendering in React

🧩Phase 4: Testing and Debugging

Advanced Testing
- Unit testing: Jest, Mocha
- Integration testing with React Testing Library or Cypress
- Snapshot testing
Error Monitoring and Debugging
- Tools: Sentry, LogRocket, or Datadog

🧩 Phase 5: Security and Best Practices

Web Security
- XSS, CSRF, CORS
- Content Security Policies (CSP)
Secure Cookies and Storage
- HttpOnly, Secure flags
- Handling tokens (JWTs) safely

🧩Phase 6: Advanced Tooling and CI/CD

Tooling
- Webpack, Rollup, or Vite for advanced bundling
- ESLint, Prettier for code consistency
CI/CD
- Integrate pipelines for automated builds and deployments
Code Review and Collaboration
- PR best practices and design discussions

🧩Phase 7: Scalability and Architecture

Micro-Frontend Architecture
- Breaking apps into smaller parts for maintainability
Monorepos
- Managing large-scale codebases with tools like Turborepo or Nx
Progressive Web Apps (PWA)
- Service workers, offline caching

Advanced JavaScript Concepts | Revised Version for Jr Dev's

Syed Muhammad Ali Raza — Sun, 29 Sep 2024 14:22:28 +0000

JavaScript Revised Version

1. let, var, and const

var

function test() {
  console.log(x); 
  var x = 10;
}

let

function test() {
  console.log(x); 
  let x = 10;
}

const

const arr = [1, 2, 3];
arr.push(4); // Works
arr = [5, 6];

2. Closures

A closure is created while a function "remembers" the variables from its outer scope, even after that scope has exited. Closures are important while managing features internal different features, where the internal function keeps access to the variables of the outer function.

function outer() {
  let count = 0;
  return function inner() {
    count++;
    console.log(count);
  };
}

const counter = outer();
counter(); // 1
counter(); // 2

3. Currying

Currying is a way wherein a function takes a couple of arguments one after the other, returning a new function for each argument. It transforms a feature that takes all arguments right now into one that takes them sequentially.

function multiply(a) {
  return function(b) {
    return a * b;
  };
}

const double = multiply(2);
console.log(double(5)); // 10

4. Promises

Promises are used to handle asynchronous operations. A promise represents an operation that hasn't completed but but is anticipated to inside the future. It can be in one in all 3 states:

Pending: Initial country, neither fulfilled nor rejected.
Fulfilled: Operation finished successfully.
Rejected: Operation failed.

const myPromise = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve("Success!");
  }, 1000);
});

myPromise
  .then((value) => console.log(value))  // "Success!"
  .catch((error) => console.log(error));

Promises are extensively utilized in present day JavaScript to address async code in a cleanser way in comparison to callbacks.

5. Hoisting

Hoisting is JavaScript's default conduct of moving declarations to the top of their scope earlier than code execution. Only the declarations are hoisted, now not the initializations.

console.log(x); // undefined
var x = 5;

In the case of var, the assertion is hoisted, but the fee venture takes place later. In evaluation, permit and const are not initialized till the code executes them, leading to a "temporal lifeless quarter" where they can't be accessed.

console.Log(y); 
let y = 10;

6. IIFE (Immediately Invoked Function Expression)

An IIFE is a function that is finished straight away after it is described. IIFEs are useful for growing a private scope to avoid polluting the global scope, which was specifically essential before the arrival of modules.

(function() {
  console.log("I am an IIFE");
})();

The feature is wrapped interior parentheses and is invoked at once after the remaining parentheses.

7. First-Class Functions (Citizen Functions)

In JavaScript, functions are great residents. This method that they can be assigned to variables, passed as arguments to other functions, and returned from other features.

const greet = function(name) {
  return `Hello, ${name}`;
};

function sayHello(greetFunction, name) {
  console.log(greetFunction(name));
}

sayHello(greet, "John"); // Hello, John

8. Variable Functions (Function Expressions)

In JavaScript, you may outline functions in two ways: the usage of function declarations and function expressions. A function expression is while you assign a feature to a variable, permitting it to behave like every other variable.

const add = function(a, b) {
  return a + b;
};

console.log(add(2, 3)); // 5

Function expressions allow for extra dynamic conduct in comparison to feature declarations.

9. Callbacks

A callback is a feature this is surpassed as a controversy to any other function and is achieved after a few operation is whole. Callbacks are closely utilized in JavaScript for asynchronous operations, which include dealing with user occasions or fetching information from a server.

function fetchData(callback) {
  setTimeout(() => {
    callback("Data loaded");
  }, 1000);
}

fetchData((data) => {
  console.log(data); // "Data loaded"
});

System Design Frontend Development

Syed Muhammad Ali Raza — Wed, 31 Jul 2024 11:14:09 +0000

System Design Overview for Low and High Level

            Requirements

Functional

-Demand/supply
-modules
-user manangemnt
-support nd help
-paymant gateway
-account managment
-cart page
-product listing
-pricing and subscription

Non-functional

-mobile responice
-inernet
-caching
-security
-customer side rendering
-server side rendering
-CI/CD
-Internationlication
-offline support
-authentication
-authorization
-performance web vitals
-image optimization assets webp , png , jpeg , svg etc

            Scoping

Functional

-Demand
-Module
Product Listing , Cart Page
-Features
-Search
-Filter
-Product Details
-Reviews
-add item to cart
-add item to whishlist
-price breakups
-add product
-remove product

---Non Functional

-Desktop
-Responsiveness
-Accescililbity like disable person etc
-Asset Optimization
-Caching
-Server Side Rendering
-Client Side Rendering

Tech Choices

-Libraary / Framework
-State Managment
-Folder Structure
-Packages
-Dependencies like canvas ,webRTC
-Build Tool
Webpack , Rollup ,Parcel

Componnet

-Routing
-Data Sharing
-Component Hierachy

Data API & Protocols & Implementation

---Protocol
-Rest/ GraphQL / SSE /rPF
-JSON/ Protocol Buffers

--Implementation
-Pagination / Infinte Scroll
-Throatling /Debouncing

---APIs
-getProductList()
-getProductDetails()
-addProduct()
-removeProduct()

---Data Modeling
-URL
-Method
-Request (query , body)
-Response (Data , Error)
-Status Code

---Component

-State /Props
-Event Handling
-Customization Support
-Theming
-Resuable
-Data Source

        Overview OF System Design

System Design

-Requirments
-Scoping
-Component Architecture
-Data API and Implementation

Product Sense

-Requirments
-Scoping
-Data API and Implementation

*UI Architecture *

-Requirments
-Scoping
-Tech Choices
-Componnet Architecture
-Data API and Implementation

*Machine Coding /component Design *

-Component Architecture
-Data API & Implementation

5 Layer of Softwares

Syed Muhammad Ali Raza — Wed, 03 Jul 2024 04:40:03 +0000

Profile Card UI using Html & Css - flexbox

Syed Muhammad Ali Raza — Sat, 29 Jun 2024 15:49:24 +0000

Profile CARD UI

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="style.css" />
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
    <title>Profile Card</title>
  </head>
  <body>
    <div class="parent">
      <div class="card">
        <div class="card-header">
            <img class="pro-image"  src="image.jpg" alt="Profile Image">
        </div>
        <div class="card-body">
          <div class="profile ">
            <h2>Syed Muhammad ALi Raza</h2>
            <h6>@syed-muhammad-ali-raza</h6>
          </div>
          <div class="social-link">
            <a href="#" class="fa fa-facebook"></a>
            <a href="#" class="fa fa-twitter"></a>
            <a href="#" class="fa fa-google"></a>
            <a href="#" class="fa fa-linkedin"></a>
            <a href="#" class="fa fa-pinterest"></a>
          </div>
          <div class="description">
            JavaScript | React js | Next.js Frontend Engineer | Software Engineer | Software Developer | Web3.0 | API Integration | T-Shaped Engineer | MUI | Tailwind | SDE | Microfrontend
          </div>
          <div class="buttons">
            <button>Follow</button>
            <button>Message</button>
          </div>
        </div>
      </div>
    </div>
  </body>
</html>

CSS

.fa {
    padding: 10px;
    font-size: 20px;
    width: 20px;
    text-align: center;
    text-decoration: none;
    margin: 5px 1px;
    border-radius: 50%;
    color: white;
  }

  .fa-facebook { background: #3B5998; }
  .fa-twitter { background: #55ACEE; }
  .fa-google { background: #dd4b39; }
  .fa-linkedin { background: #007bb5; }
  .fa-pinterest { background: #cb2027; }

  .card-header {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
  }

  .card {
    background-color: black;
    color: white;
    border-radius: 10px;
    overflow: hidden;
    width: 25%;
    margin: auto;
  }

  .pro-image {
    width: 130px;
    height: 130px;
    border-radius: 50%;
  }

  .parent {
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }

  .buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;

  }

  button {
    color: black;
    background-color: white;
    padding: 10px;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    margin-left: 20px;
  }

  .card-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
  }

  .description {
    margin-top: 20px;
    text-align: center;
  }

  .profile h2,
  .profile h6 {
    margin: 5px 0;
  }

  .social-link {
    display: flex;
    justify-content: center;
    margin-top: 20px;
  }
  .profile{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

Here is the github Repo Link Github Repo

Conflict-Free Replicated Data Types (CRDTs) in Frontend Development

Syed Muhammad Ali Raza — Tue, 18 Jun 2024 21:09:24 +0000

Data consistency in distributed systems is a challenging task in today's advanced development environment. As web applications increasingly adopt real-time collaboration characteristics, the need for reliable data synchronization mechanisms is critical. The conflict-free replica data type (CRDT) appears as a promising solution, enabling seamless and conflict-free data replication between multiple clients. This article explores the nature, types, and applications of CRDT in external development.

What is CRDT?

CRDTs, or contention-free replication data types, are data structures designed to manage the complexity of distributed systems by providing end-to-end consistency without requiring coordination between nodes. Unlike traditional approaches that rely on centralized servers or complex conflict resolution protocols, CRDT allows each replica to apply updates independently and resolve conflicts automatically based on predefined rules.

The main principles of CRDT are:

Idempotence: The procedure can be used several times without changing the result other than the initial program.
Commutativity: The operation can be used in any order and still produce the same result.
Associativity: The operation group does not affect the final result.

This principle allows maintaining consistency between distributed nodes, even in the case of system fragments or asynchronous updates.

Types of CRDTs

CRDT can be broadly divided into two types: condition-based (convergent) and application-based (commutative).

State-based CRDTs (CvRDTs):

In state-based CRDTs, each replica maintains a local state that can be combined with the states of other replicas. Fusion is designed to be practical, cohesive, and seamless. An example of a state-based CRDT is a Grow-Only Counter, where counters from different copies are merged.

""Operation-based CRDTs (CmRDTs)"":

Each step is designed to ensure that the workflow does not affect the final state. A common example is a set of Additions, where additions and deletions are resolved by assigning values to the additions.

Use of CRDTs in front-end development

CRDTs have found important applications in future development, especially in real-time collaborative applications, offline-first applications, and decentralized applications.

Real-time collaboration apps:

Apps like Google Docs and Figma rely on real-time collaboration, where multiple users can edit the same document at the same time. By using CRDTs, this application ensures seamless deployment and integration between all users, even when offline.

Offline-first application:

In scenarios where users may experience remote communication, offline-first application becomes crucial. CRDTs allow these applications to continue to run offline, allowing users to make local changes and automatically sync those changes once connectivity is restored.

Decentralized Applications: With the proliferation of decentralized web (Web3) and peer-to-peer applications, it is difficult to maintain data consistency without a centralized authority. CRDT provides a way to achieve consensus and data consistency across distributed nodes, making it ideal for decentralized applications.

Implementation of CRDTs in front-end development

Applying CRDTs in front-end development includes choosing the appropriate CRDT type based on application requirements and integrating it with the front-end. Libraries and frameworks such as Automerge, Yjs, and Logotip provide a ready-to-use CRDT process, simplifying the development process.

For example, enabling Automerge in React to edit text together includes:

Initialization:

Automatically set the status of the initial document.

Updates and Sync:

Apply changes and sync with other clients using the Automerge API.

Rendering:

Rendering the state of the document in the meta component.

import React, { useState, useEffect } from 'react';
import * as Automerge from 'automerge';
import { WebSocketProvider } from 'y-websocket';

const CollaborativeEditor = () => {
  const [doc, setDoc] = useState(() => Automerge.init());
  const [text, setText] = useState("");

  useEffect(() => {
    const wsProvider = new WebSocketProvider('wss://your-websocket-server');
    wsProvider.on('document-update', (update) => {
      setDoc(Automerge.applyChanges(doc, update));
    });
    return () => wsProvider.disconnect();
  }, [doc]);

  const handleChange = (e) => {
    const newText = e.target.value;
    const newDoc = Automerge.change(doc, doc => {
      doc.text = newText;
    });
    setDoc(newDoc);
    setText(newText);
  };

  return <textarea value={text} onChange={handleChange} />;
};

export default CollaborativeEditor;

Custom Browser Engines Frontend Development

Syed Muhammad Ali Raza — Mon, 17 Jun 2024 07:30:02 +0000

Innovation is a constant in the dynamic realm of advanced development, driving industry forward in extraordinary ways. One of the more interesting developments in recent years has been the emergence of dedicated browser engines. Designed to meet specific needs that mainstream browsers can't answer, this engine takes a unique approach to web presentation and performance.

Understand the Core Browser Engine

A browser engine, also known as a rendering engine, is the core software of a web browser that interprets HTML, CSS, JavaScript, and other web technologies to display web pages. Popular examples include Blink (used by Google Chrome), Gecko (used by Mozilla Firefox), and WebKit (used by Safari).

Custom browser engines are special options designed for specific use cases, often different from general purpose engines to improve engine performance, security, or performance in general areas. These engines can be built from scratch or as forks of existing engines that fit specific requirements.

Why Custom Browser Engines?

Performance Optimization:
Custom browser engines can be customized in ways that general purpose engines cannot. By removing unnecessary features and focusing on specific functions, this engine can result in faster load times and better performance for target applications.
Advanced Security:
In security-sensitive environments, such as financial institutions or government agencies, specific browser engines may implement stricter security protocols. It can include advanced security features to minimize attack points and ensure strict compliance.
Event Specialization:
Applications that require special display methods, such as augmented reality (AR) or virtual reality (VR), benefit greatly from custom engines. This engine can be optimized to handle complex graphics and high-speed instructions, providing a superior user experience.
Feature Test:
Developers and researchers can use dedicated engines to experiment with new web technologies and features without waiting for mainstream browsers to adopt them. This can accelerate innovation and provide valuable insight into future web standards.

Challenges of Custom Browser Engines

Development and Maintenance:
Creating and maintaining a custom browser engine is resource intensive. It requires a team of skilled professionals with deep knowledge of web technologies, display processes and security practices.
Compatibility Problem:
Ensuring compliance with large amounts of web content is difficult. Custom engines need to be updated regularly to handle new web standards and ensure consistent performance across different websites.
Limited Adoption:
Custom search engines may face limited adoption due to their nature. It can be difficult to get users and developers to adopt a newer engine over an established one, especially if the benefits aren't immediately obvious.
Security Risk:
While dedicated machines can improve security, they can also introduce new vulnerabilities if not properly managed. Regular security checks and updates are required to mitigate this risk.

Case studies and applications

Company Solutions:
Some companies develop custom browser engines for their internal applications. For example, financial institutions can build machines with enhanced encryption and secure processing capabilities to ensure their sensitive operations are protected from cyber threats.
Games with VR/AR:
Animation plays an important role in the gaming industry and AR/VR applications. An engine optimized for 3D rendering and low latency can deliver an immersive experience that general-purpose browsers have to contend with.

Research and Development: Research organizations and technology companies often experiment with specialized engines to test new web standards and technologies. It helps shape the future of web development by providing insight and real-world data on the effectiveness of proposed changes.

The Future of Custom Browser Engines

The future of specialized search engines in advanced development seems promising due to the continuous need for optimal performance, enhanced security and innovative features. As the web evolves, so does the demand for specialized machines that can meet the basic requirements.

Setting Up the Project

Initialize the Project: First, create a new directory

   mkdir custom-browser-engine
   cd custom-browser-engine
   npm init -y

Install Puppeteer:

   npm install puppeteer

Implementing the Custom Browser Engine

Create the Custom Engine Script: Create a file named customEngine.js and add the following code:

   const puppeteer = require('puppeteer');

   (async () => {
     // Launch a new browser instance
     const browser = await puppeteer.launch();
     const page = await browser.newPage();

     // Set the URL you want to visit
     const url = 'https://example.com';

     // Navigate to the URL
     await page.goto(url, { waitUntil: 'networkidle2' });

     // Manipulate the page content
     await page.evaluate(() => {
       document.body.style.backgroundColor = 'lightblue';
       const header = document.querySelector('h1');
       if (header) {
         header.textContent = 'Custom Browser Engine Demo';
       }
     });


     await page.screenshot({ path: 'screenshot.png', fullPage: true });

     console.log('Screenshot taken and saved as screenshot.png');


     await browser.close();
   })();

Run the Custom Engine Script: Run the script using Node.js.

   node customEngine.js

Explanation

Launching the Browser:
The puppeteer.launch() function starts a new instance of Chromium, which Puppeteer will control.
Navigating to a URL:
The page.goto(url, { waitUntil: 'networkidle2' }) command navigates to the specified URL and waits until the network is idle (i.e., no more than 2 network connections are active).
Manipulating Page Content:
The page.evaluate() function allows you to execute JavaScript code in the context of the webpage. In this example, it changes the background color of the page and modifies the text of the first h1 element.
Taking a Screenshot:
The page.screenshot() function captures a screenshot of the page and saves it to the specified file path.
Closing the Browser:
Finally, the script closes the browser using browser.close().

Customizing Further

You can customize this script further to implement more complex features, such as:

Extracting Data:
Use Puppeteer to extract data from web pages and save it in various formats (e.g., JSON, CSV).
Simulating User Interactions:
Automate user interactions like clicking buttons, filling forms, and navigating through pages.
Performance Testing:
Measure and analyze the performance of web pages under different conditions.

Conclusion

Custom browser engines represent a fascinating frontier in frontend development. They offer tailored solutions that push the boundaries of what is possible on the web, addressing specific needs that mainstream browsers may not fully meet.

If you have any query than DM me on LinkedIn Syed Muhammad Ali Raza