7 What is JavaScript Variable Hoisting

7  What is JavaScript Variable Hoisting

Hoisting is JavaScript's default behavior of moving declarations to the top. In JavaScript, a variable can be declared after it has been used. Hoisting is JavaScript's default behavior of moving all declarations to the top of the current scope (to the top of the current script or the current function).

Hoisting is JavaScript's default behavior of moving declarations to the top.

JavaScript Declarations are Hoisted In JavaScript, a variable can be declared after it has been used.

In other words; a variable can be used before it has been declared.

o understand this, you have to understand the term "hoisting".

Hoisting is JavaScript's default behavior of moving all declarations to the top of the current scope (to the top of the current script or the current function).

The let and const Keywords Variables defined with let and const are hoisted to the top of the block, but not initialized.

Meaning: The block of code is aware of the variable, but it cannot be used until it has been declared.

Using a let or const variable before it is declared will result in a ReferenceError.

The variable is in a "temporal dead zone" from the start of the block until it is declared:

JavaScript Initializations are Not Hoisted JavaScript only hoists declarations, not initializations.

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