In JavaScript, scope determines the accessibility of variables and functions at different parts of your code. Mastering scope is essential for writing clean, bug-free JavaScript code and ensuring variables and functions behave as expected. Let’s dive...
Introduction: Closures are a fundamental concept in JavaScript that allows functions to access variables from their outer scope, even after the outer function has returned. This ability gives JavaScript its unique approach to state management and fun...
In JavaScript, there are three primary ways to declare variables or functions: const, let, and var. Although all three can be used to declare arrow functions, each has its own behaviors and implications. Understanding these differences can help you a...
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...
Variable shadowing: In JavaScript, variable shadowing occurs when a variable with the same name as a variable in a higher scope is declared in a lower scope, potentially causing confusion; let a = 10; if (true) { let a = 20; console.log(a); } ...
🚀 Welcome to the JavaScript with Node.js Journey! Today, let's dive into an exciting topic: Global vs Local Variables, Block Scope, and Differences Between let, const, and var! 💡 Global vs Local Variables:🌎 Global Variables: They're like superst...
들어가며 인터뷰에서 "어떤 방식으로 함수 정의하는 것을 선호하세요?" 라는 질문을 받은 적이 있다. 그 당시에는 JS에 관한 공부가 부족했기에 정의 방식에 따라 어떤 차이가 있는지 확실하게 알지 못했다. 고로 대답은 했지만 그에 대한 근거가 부족했다. JS를 공부하고 나서 이 질문의 큰 그림을 알게 되었다. 함수 정의 방식에 따라 스코프, 호이스팅, this 등 JS의 다른 개념들이 숨어있었고 그 개념들까지 제대로 알고 있느냐를 판단하기 위한 ...
Scope : Scope is one of the most important JavaScript concepts. It helps us to understand other concepts such as closures and lexical environment. There are two types of scopes : Global scope Local scope (Block and function scope) Global scope : ...
Hello there, fellow coding enthusiasts! Welcome to our exploration of JavaScript! In this journey, we'll be delving into two crucial concepts: closures and asynchronous programming. Are you excited to learn about how JavaScript works behind the scene...
Expert-Level Explanation Scope in JavaScript refers to the visibility of variables. Global Scope: Variables declared globally (outside of any function or block). These are accessible from anywhere in the code. Local (function) scope: variables decl...
