To implement a function that deep clones an object in JavaScript, you need to ensure that nested objects and arrays are also copied correctly. Explanation: 1) Base Case: If the input is not an object or is null, it returns the value directly (handles primitive values). 2) Create Clone: Initializes a new array or object to hold the cloned values based on the type of the input. 3) Recursive Copy: Iterates over the properties of the original object, recursively cloning each property. 4) Return: Returns the new, deep-cloned object. This approach ensures that all levels of the object, including nested objects and arrays, are cloned correctly.