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Module III — Basics of Web Programming

20242m

In JavaScript, what is the result of the following expression: typeof null? (i) null (ii) object (iii) undefined (iv) boolean

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Answer: (ii) object

typeof null returns "object". This is a long-standing bug from the first version of JavaScript, where null was represented with the object type tag, and it was kept for backward compatibility. To test for null, use value === null.

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