The Temporal Dead Zone (TDZ) in ES6, or ECMAScript 2015, is a behavior in JavaScript that occurs when variables declared with let or const are hoisted to the top of their containing scope (block scope) but are not accessible until the lines of code declaring them are executed. This means that if you try to access such variables before they are declared, JavaScript will throw a ReferenceError instead of returning undefined as it would with variables declared with var[1][2][3][4][6].
The TDZ starts at the beginning of the block where the variable is contained and ends at the point where the variable is declared. For example, if you have a block of code with a let or const variable declared halfway through, any attempt to access that variable before its declaration line will result in a ReferenceError because the variable is in the TDZ[2][4].
This mechanism is designed to help developers avoid common bugs associated with variable declarat...
