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PKpushpesh kumarpushpesh-js-articles.hashnode.devMay 24, 2025 · 11 min read

JS Fundamentals #8 — 🧩 Primitive vs Reference Values in JavaScript

One of the most fundamental concepts in JavaScript that often confuses developers is the difference between primitive and reference values. This distinction affects how variables are stored, copied, compared, and passed to functions. Understanding th...

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MMMartin Mwendajavascriptmasteryhub.hashnode.devAug 19, 2024 · 4 min read

Understanding Javascript var, let and const

Upon the release of ES2015 (ES6), two new ways of variable declaration were introduced to javascript. The two new keywords introduced were, let and const. Earlier the var keyword was only used to declared variables. In this article we dive deeper and...

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BJBhavesh Jadhavbhaveshjadhav.hashnode.devMay 28, 2024 · 3 min read

Understanding JavaScript Blocks and Scope

Block in JavaScript A block, or compound statement, in JavaScript is defined by the curly braces {}. It is used to group multiple statements together. For example: { let a = 10; console.log(a); } Why Do We Need to Group Statements? We group ...

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BJBhavesh Jadhavbhaveshjadhav.hashnode.devMay 27, 2024 · 3 min read

JavaScript Essentials: Understanding Scope, Lexical Environment, and Hoisting

Unveiling JavaScript Scope, Lexical Environment, and Hoisting: Demystifying Key Concepts Scope: Where Variables and Functions Live Scope determines where you can access a specific variable or function in your code. It is directly dependent on the lex...

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ZHZakeer Hussain Syedfullstackinstitute.hashnode.devApr 23, 2024 · 3 min read

JavaScript Variables: Master var, let, & const for Cleaner Code

What are variables and why do we need them? Variables are like containers in your computer's memory that hold data. Imagine them as labeled boxes where you can store different items (numbers, text, etc.). They're essential for building dynamic progra...

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MSMeghana S Kmeghanask.hashnode.devApr 2, 2024 · 2 min read

Scope in Javascript

What exactly is the scope? Why do we need it? Scope determines the accessibility/usage of variables, functions and objects from different parts of the code. Before diving into its types, there is a term called lexical scope. Let's try to understand t...

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OEOjas Elawadhiojaselawadhi.techNov 17, 2023 · 2 min read

Hoisting in JavaScript: Demystifying the 'Lift and Shift'

JavaScript, the language of the web, has its share of enchanting mysteries. One such mystery is "hoisting." Imagine it as a magical 'Lift and Shift' that happens behind the scenes. Let's unravel this wizardry in the world of JavaScript and make it as...

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CMCorina Murgcorina.hashnode.devOct 27, 2023 · 2 min read

Demystifying Function Declarations Within Conditional Blocks

In the two previous posts in this series about hoisting, we talked about how function declarations - using the function keyword - are hoisted along with their definitions. This means we can call such a function BEFORE its code even appears, and it wi...

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NCNicole C.myblog.thepronicoleSep 17, 2023 · 3 min read

The Scoop on Scopes JavaScript

Okay so you have declared your variable and you are ready to put it in use! You have an error. It's saying ReferenceError: (your variable) is not defined. That makes no sense you have declared it with a const. You're looking right at the variable. W...

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APAnirudha Patilatomicjuggernaut.hashnode.devApr 12, 2023 · 3 min read

JavaScript Interview Question: Function Scope vs. Block Scope

JavaScript, like any other programming language, has a concept of scope that dictates the lifetime or availability of a variable or function. In this article, we will explore the difference between function scope and block scope, hoisting in JavaScri...

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#block-scope

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Trending tags this week

JS Fundamentals #8 — 🧩 Primitive vs Reference Values in JavaScript

Understanding Javascript var, let and const

Understanding JavaScript Blocks and Scope

JavaScript Essentials: Understanding Scope, Lexical Environment, and Hoisting

JavaScript Variables: Master var, let, & const for Cleaner Code

Scope in Javascript

Hoisting in JavaScript: Demystifying the 'Lift and Shift'

Demystifying Function Declarations Within Conditional Blocks

The Scoop on Scopes JavaScript

JavaScript Interview Question: Function Scope vs. Block Scope