Object.defineProperties()

The Object.defineProperties() static method defines new or modifies existing properties directly on an object, returning the object.

Return value: The object that was passed to the function.

Parameters: obj The object on which to define or modify properties. props An object whose keys represent the names of properties to be defined or modified and whose values are objects describing those properties. Each value in props must be either a data descriptor or an accessor descriptor; it cannot be both (see Object.defineProperty() for more details).

Parameters: Data descriptors and accessor descriptors may optionally contain the following keys: configurable true if and only if the type of this property descriptor may be changed and if the property may be deleted from the corresponding object. Defaults to false. enumerable true if and only if this property shows up during enumeration of the properties on the corresponding object. Defaults to false.

Syntax example: Object.defineProperties(obj, props)