Count Object Fields

countObjectFields

The countObjectFields function counts the number of enumerable own properties in a given object. It safely handles null and undefined inputs by returning 0.

Function Signature

function countObjectFields<T>(obj: T): number

Parameters

• obj (T): The object to count properties of.

Return Value

• number: The count of enumerable own properties, or 0 if the object is null, undefined, or not a valid object.

Example Usage

Notes

• This function only counts enumerable own properties (identical behavior to Object.keys()).
• Inherited properties from the prototype chain are not counted.
• Symbol-keyed properties are not counted.