What is the temporal dead zone in JavaScript?

Can you explain what the temporal dead zone is in JavaScript?

Sure! The temporal dead zone (TDZ) refers to the period in JavaScript where a variable is in scope but not yet initialized. This typically occurs with variables declared using let and const.

Why does the temporal dead zone happen?

The TDZ happens because let and const declarations are hoisted to the top of their block scope, but they cannot be accessed until the actual declaration is encountered in the code.

Can you give me an example of the temporal dead zone?

Certainly! Here's an example:

console.log(x); // ReferenceError: Cannot access 'x' before initialization
let x = 10;

In this case, trying to access x before its declaration results in a ReferenceError.

How can I avoid issues with the temporal dead zone?

To avoid issues with the TDZ, always declare your variables at the top of their scope before using them. This ensures they are initialized before any access.