Binding (also called as Scoping) is of two types - Static and Dynamic.

Static Scoping (i.e. Static Binding) is also called as Lexical Scoping (i.e. Lexical Binding).
JS follows Static (Lexical) Binding/Scoping.
In Static (Lexical) Binding/Scoping, inner scope can access variables of outer scopes, but outer scopes can't access variables of inner scopes. (Child has access to parent's scope. But parent can't access child scope.)

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