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PSPrashant Sainiprashsainidev.hashnode.devApr 24 · 7 min read

Node.js Event Loop Explained Clearly

Introduction Whenever someone says Node.js is single-threaded, one doubt comes up almost immediately: then how does it handle so many requests at the same time? At first, this sounds a little confusin

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PSPrashant Sainiprashsainidev.hashnode.devApr 24 · 6 min read

NodeList vs HTMLCollection: Understanding the Real Difference in the DOM

Introduction At some point while learning the DOM, almost everyone runs into this confusion: querySelectorAll() returns one thing, and getElementsByClassName() returns another. But both look like list

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PSPrashant Sainiprashsainidev.hashnode.devApr 23 · 3 min read

Array Flatten in JavaScript

Introduction Sometimes an array does not contain direct values only, but other arrays as well. const numbers = [1, [2, 3], [4, 5]]; This is called a nested array. And when we convert it into a simple

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PSPrashant Sainiprashsainidev.hashnode.devApr 23 · 2 min read

JavaScript Modules: Import and Export Explained

Introduction As JavaScript projects grow, one problem appears quickly: keeping all the code in one file becomes messy This is where modules become useful. Why Modules Are Needed If everything is in o

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PSPrashant Sainiprashsainidev.hashnode.devApr 23 · 3 min read

Error Handling in JavaScript: Try, Catch, Finally

Introduction JavaScript code does not always run perfectly. Sometimes: the wrong variable gets used an invalid value appears an unexpected situation occurs Errors can happen in all of these situa

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PSPrashant Sainiprashsainidev.hashnode.devApr 23 · 3 min read

Async/Await in JavaScript: Writing Cleaner Asynchronous Code

Introduction Promises made asynchronous code better than callbacks. But as the steps increased, .then() chaining could still start to feel a little noisy. This is where async and await become useful.

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PSPrashant Sainiprashsainidev.hashnode.devApr 22 · 7 min read

Understanding JavaScript Promises - A Beginner's Real Experience

When I first saw this code: console.log("Start"); setTimeout(() => console.log("Async Task"), 2000); console.log("End"); Output: Start End Async Task My first reaction was, "Okay, there is a 2000ms

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PSPrashant Sainiprashsainidev.hashnode.devApr 22 · 4 min read

Callbacks in JavaScript: Why They Exist

Introduction In JavaScript, functions are not just blocks of code that run. We can: store functions pass functions around and call them later This is where the callback concept begins. In simple

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PSPrashant Sainiprashsainidev.hashnode.devApr 22 · 4 min read

Synchronous vs Asynchronous JavaScript

Introduction At some point while learning JavaScript, this question naturally comes up: When does code run line by line, and when does some work happen later? This is where the topic of synchronous an

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PSPrashant Sainiprashsainidev.hashnode.devApr 21 · 4 min read

String Polyfills and Common Interview Methods in JavaScript

Introduction Strings are very common in JavaScript. We work with them every day: checking text splitting text converting to lowercase or uppercase accessing characters But in interviews and deep

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#javascript-interview-question

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Trending tags this week

Node.js Event Loop Explained Clearly

NodeList vs HTMLCollection: Understanding the Real Difference in the DOM

Array Flatten in JavaScript

JavaScript Modules: Import and Export Explained

Error Handling in JavaScript: Try, Catch, Finally

Async/Await in JavaScript: Writing Cleaner Asynchronous Code

Understanding JavaScript Promises - A Beginner's Real Experience

Callbacks in JavaScript: Why They Exist

Synchronous vs Asynchronous JavaScript

String Polyfills and Common Interview Methods in JavaScript