What are the return value types of typeof in js

The typeof operator in JavaScript returns a string according to the type of the given value: "undefined": undefined value "boolean": Boolean value "string": string value "number": numeric value "bigint" ": BigInt value "symbol": Symbol value "object": JavaScript object (including arrays, dates, and functions) "null": null value "function": function value Note: typeof NaN returns "number", while typeof [] returns "object".

The return value type of typeof in JavaScript

typeof The operator is used to return the type of a specified JavaScript value. Possible return values ​​include:

• "undefined": Indicates that the value is undefined.
• "boolean": Indicates a Boolean value (true or false).
• "string": Represents a string value.
• "number": Represents a numeric value (integer or floating point number).
• "bigint": Represents a BigInt value (an integer greater than Number.MAX_VALUE or less than Number.MIN_VALUE).
• "symbol": Represents the Symbol value.

• "object":

  • "null": A well-defined null value.
  • JavaScript objects (including arrays, dates, functions, and maps).
• "function": Indicates the function value.

Note:

• typeof NaN returns "number", even if NaN is not a valid number.
• typeof [] Returns "object", even if the array is technically an array-like object.

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