# Temporal Dead Zone

The period where a block-scoped variable exists but cannot be accessed before its declaration.

## What is **Temporal Dead Zone** in JavaScript?

**Temporal Dead Zone** — The period where a block-scoped variable exists but cannot be accessed before its declaration.

```javascript
{
    const status = "Ready";
}
```

Level: Master · [More JavaScript terms at this level](https://www.ask-codey.com/glossary/subjects/javascript/master)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/temporal-dead-zone