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Hoisting ↔ (mechanism) to access Variable before Declaration

aka Hoisted

before execution, code is scanned for variable declarations

each Variable, is assigned a new property in VE

Hoisting differs per variable type

TDZ​

Region of Code outside Scope of a variable, variable uninitialized from Scope start to Declaration

Historically, hoisting was added to enable programming techniques such as Mutual Recursion (and possibly improve code readability)

References​

  1. Hoisting let & const variables ↔ !technically Hoisted as <uninitalized\> via TDZ Block-scoped