The Object.assign() method copies all enumerable own properties from one or more source objects to a target object. It returns the modified target object. Your task is to replicate this functionality.
- If the target is
null or undefined, throw a TypeError.
- Only enumerable and own properties should be copied.
- Later source properties overwrite earlier ones if they have the same key.
- The method should return the target object.
Example Inputs & Outputs
customAssign({a: 1}, {b: 2}) → {a: 1, b: 2}
customAssign({a: 1}, {a: 2, b: 3}) → {a: 2, b: 3}
customAssign({}, {a: undefined}, {b: null}) → {a: undefined, b: null}
Constraints & Edge Cases
target must not be null or undefined- Only own, enumerable properties of source objects should be copied
- If a source is
null or undefined, it should be skipped (not throw an error)
- Must return the modified
target object
- Symbol properties should be ignored in this simplified version
