JavaScript Reflect getOwnPropertyDescriptor() Method

by Online Tutorials Library July 22, 2022

JavaScript Reflect.getOwnPropertyDescriptor() Method

The static Reflect.getOwnPropertyDescriptor() method is used to retrieve the descriptor of an object’s property. It is same as the Object.getOwnPropertyDescriptor method.

Syntax:

Parameters:

Obj: It is the target object in which to look for the property.

Key: It is the name of the property to get an own property descriptor for.

Return value:

It returns the property descriptor object if the property exists in the given target object. Otherwise, it returns undefined.

Exceptions:

A TypeError, if the target is not an Object.

Browser Support:

Chrome	49
Edge	12
Firefox	42
Opera	36

Example 1

  const object1 = {    property1: 22    };  console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property2’));  console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property1’).writable);  

Output:

undefined   true

Example 2

  const object1 = {    property1: 234    };  const hh = {p:4};  console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property1’).value);    console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property2’));    console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property1’).writable);    console.log (   Reflect.getOwnPropertyDescriptor ( hh , “yyy” ) === undefined  );  

Output:

234  Undefined  true  true

Example 3

  const object1 = {    property1: 42  };  console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property1’).value);    console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property2’));    console.log(Reflect.getOwnPropertyDescriptor(object1, ‘property1’).enumerable);  

Output:

42  undefined  true

Next TopicJavaScript Reflect

apply() construct()defineProperty() method deleteProperty()get getOwnPropertyDescriptor()getPrototypeOf()has()isExtensible()javascript reflect methods ownKeys()setPrototypeOf()

JavaScript Reflect getOwnPropertyDescriptor() Method

JavaScript Reflect.getOwnPropertyDescriptor() Method

Syntax:

Parameters:

Return value:

Exceptions:

Browser Support:

Example 1

Example 2

Example 3

Working of HashSet in Java

JavaScript Array concat() Method

You may also like