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What Is the Scope Chain?

Does JavaScript search parent scopes automatically?

The answer

Yes. JavaScript moves up the scope chain until it finds the variable or reaches the global scope.

More FAQs in What Is the Scope Chain?

The scope chain is the sequence of scopes JavaScript searches when resolving variables.

JavaScript throws a ReferenceError.

Yes. Closures use the scope chain to access variables from outer scopes.

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