Deleting Own Properties
You can use the delete operator to remove properties directly attached to an object:
In this example, the age property is removed from the person object using delete.
Deleting Inherited Properties
The delete operator can also remove properties inherited from the object's prototype:
In this case, the sayHello method is removed from the bill object, causing an error when trying to call it.
Limitations and Considerations
- Cannot Delete Variables or Functions: The delete operator cannot remove variables or functions declared with var, let, const, or function declarations.
- Non-configurable Properties: If a property is marked as non-configurable (using Object.defineProperty or similar methods), the delete operator will have no effect.
- Array Elements: The delete operator can be used to remove elements from arrays, but it will leave an empty slot instead of reindexing the array.
- Use with Caution: The delete operator can lead to unexpected behavior, especially when dealing with prototype chains and unintended property removals.