JavaScript · Middle · Question 58 of 75

Which error does `undefinedVariable.foo` throw, and which `null.foo`?

✓Correct answer: ReferenceError (variable not declared) and TypeError (reading a property of null)
2TypeError in both cases
3SyntaxError and TypeError

Explanation

ReferenceError means a name can't be resolved; TypeError means a value is used in a way its type doesn't allow. Checking err instanceof TypeError helps handle errors precisely.

Which error does `undefinedVariable.foo` throw, and which `null.foo`?

Explanation

Further reading

Problem with a question

Test yourself

Which error does undefinedVariable.foo throw, and which null.foo?

Explanation

Further reading

Test yourself

Which error does `undefinedVariable.foo` throw, and which `null.foo`?