Scope of Variables and Functions
Explore the different scopes of variables and functions in JavaScript including global, function, block, and module scopes. Understand concepts like lexical scope, hoisting, and closures to write efficient and maintainable code.
We'll cover the following...
We'll cover the following...
In JavaScript, the scope of variables and functions determines their accessibility, or visibility, in different parts of a program. The scope can be classified into global scope, function scope, block scope, and module scope. Let’s dive into these types:
Global scope
Variables or functions declared in the global context are accessible throughout the entire program.
Let’s understand how to declare them:
Global variables: Variables declared with
var,let, orconstoutside of any function or ...