The Temporal Dead Zone (TDZ) is the time between: When a let or const variable is hoisted, and When it is actually declared/initialized in code. During this time, the variable exists in memory (because of hoisting), but you can’t access it — doing so throws a ReferenceError.

Apr 11, 2025 - 17:37
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The Temporal Dead Zone (TDZ) is the time between:

  1. When a let or const variable is hoisted, and
  2. When it is actually declared/initialized in code.

During this time, the variable exists in memory (because of hoisting), but you can’t access it — doing so throws a ReferenceError.