What is the temporal dead zone in JavaScript?

What is the temporal dead zone in JavaScript?

The temporal dead zone (TDZ) refers to the period from the start of a block until the variable is declared. During this time, accessing the variable will result in a ReferenceError.

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

Sure! Here's an example:

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

In this case, trying to log x before its declaration leads to an error.

Why does the temporal dead zone exist?

The TDZ exists to prevent the use of variables before they are declared, which helps avoid bugs and makes the code more predictable.

How can I avoid issues with the temporal dead zone?

To avoid issues, always declare your variables at the top of their scope before using them. This way, you won't run into the TDZ.