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Ankur in JS

Mastering Global Variables in JavaScript

Global variables in JavaScript are a topic that often sparks debate among developers. While they offer convenience, their misuse can lead to messy, hard-to-maintain code. At AnkurM.com, we believe in writing clean, robust JavaScript, and that includes understanding the right way to handle global variables. This guide will walk you through the various approaches, highlighting best practices and common pitfalls. Let’s dive in! Understanding the Global Scope In web browsers, the global scope is represented by the window object (or self or frames, though window is most common). Any variable declared outside of a function or block, or implicitly declared without let, const, or var, becomes a property of the global object.

1 min read
Ankur in JS

Understanding Variable Hoisting in JavaScript

Let's dive into a fundamental concept in JavaScript that often trips up beginners (and even seasoned developers occasionally): variable hoisting. Understanding how hoisting works is crucial for writing predictable and bug-free JavaScript code. Let's break it down. What is Hoisting? In simple terms, "hoisting" is JavaScript's default behavior of moving declarations to the top of their current scope (either the global scope or the function scope) during the compilation phase, before the code is actually executed. It's important to note that only the declaration is hoisted, not the initialization. Think of it like this: before your JavaScript engine runs a single line of code, it scans through your script and pulls all variable and function declarations to the top. This means you can use a variable or call a function before it's "physically" declared in your code.

1 min read
Ankur in JS

Geolocation API

The browser Geolocation API explained with the HTTPS-only requirement, navigator.permissions.query usage, and full error handling for all three PositionError cases, plus FAQs and See Also.

1 min read