ReferenceErrorbeginner

ReferenceError — instanceof check

📖 Usage Example

try {
  console.log(undeclaredVar)
} catch (e) {
  e instanceof ReferenceError  // → true
}

ReferenceError is thrown when you try to access a variable that has not been declared.

ReferenceError Constructor

new ReferenceError('not defined') creates a ReferenceError instance.

Challenge: Verify that a new ReferenceError is an instance of ReferenceError.

💡 Hints (1)

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