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Type Coercion, Truthy/Falsy & == vs ===

JavaScript's most notorious source of bugs — do you know when + concatenates vs adds, which 8 values are falsy, and why NaN === NaN is false?

8 questions · 20 minutes

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Type Coercion, Truthy/Falsy & == vs ===

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JavaScript's most notorious source of bugs — do you know when + concatenates vs adds, which 8 values are falsy, and why NaN === NaN is false?

8Questions
20 minTime limit
60%Passing score
Unlimited — latest score keptAttempts
Randomized optionsOne at a time