Delete Operator

The delete operator can be used to remove a property from an object. When a property is deleted, it is removed from the object and cannot be accessed or enumerated (i.e., it does not show up in a for-in loop).

Here's the syntax for using delete:

delete object.property;

For example:

let adult = { age: 26 },
  child = Object.create(adult);

child.age = 8;

delete child.age;

/* Remove age property from child, revealing the age of the prototype, because then it is not overridden. */

let prototypeAge = child.age;
// 26, because child does not have its own age property.

The delete operator does not modify the object's prototype chain. It simply removes the specified property from the object and also it does not actually destroy the object or its properties. It simply makes the properties inaccessible. If you need to destroy an object and release its memory, you can set the object to null or use a garbage collector to reclaim the memory.