What are JavaScript object property flags and descriptors?

In JavaScript, property flags and descriptors manage the behavior and attributes of object properties.

Property flags

Property flags are used to specify the behavior of a property on an object. Here are the available flags:

• writable: Specifies whether the property can be written to. Defaults to true.
• enumerable: Specifies whether the property is enumerable. Defaults to true.
• configurable: Specifies whether the property can be deleted or its attributes changed. Default is true.

Property descriptors

These provide detailed information about an object's property, including its value and flags. They are retrieved using Object.getOwnPropertyDescriptor() and set using Object.defineProperty().

The use cases of property descriptors are as follows:

• Making a property non-writable by setting writable: false to ensure data consistency.
• Hiding a property from enumeration by setting enumerable: false.
• Preventing property deletion and modification by setting configurable: false.
• Freezing or sealing objects to prevent modifications globally.