What is hoisting in JavaScript and how does it work?
What is hoisting in JavaScript and how does it work?
6015-May-2023
Updated on 15-May-2023
Home / DeveloperSection / Forums / What is hoisting in JavaScript and how does it work?
What is hoisting in JavaScript and how does it work?
Aryan Kumar
15-May-2023Hoisting is a JavaScript concept that refers to the process of moving all variable and function declarations to the top of their scope, regardless of where they are actually declared. This means that even if you declare a variable or function in the middle of your code, it will be available as soon as the script starts executing.
For example, the following code will print "Hello World!" even though the greet() function is declared after the console.log() statement:
Code snippet
This is because the greet() function is hoisted to the top of its scope, even though it is declared later in the code.
Hoisting can be a bit confusing at first, but it is an important concept to understand if you want to write efficient JavaScript code.
Here are some additional details about hoisting:
Here are some tips for avoiding problems with hoisting: