9/28/2023 0 Comments Typeof javascript![]() This is a long-standing bug in JavaScript, but since lots of codes on the web written around this behavior, and thus fixing it would create a lot more problem, so idea of fixing this issue was rejected by the committee that design and maintains JavaScript. ![]() Typeof // Returns: "function"Īs you can clearly see in the above example when we test the null value using the typeof operator ( line no-22), it returned "object" instead of "null". Consequently, null had 0 as type tag, hence the typeof return value 'object'. null was represented as the NULL pointer (0x00 in most platforms). Typeof undeclaredVariable // Returns: "undefined" In the first implementation of JavaScript, JavaScript values were represented as a type tag and a value.
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