JS: Object.getOwnPropertyDescriptor

By Xah Lee. Date: . Last updated: .

Object.getOwnPropertyDescriptor(obj, key)

Return the attributes of property key of object obj. If the property doesn't exist, return undefined.

[see JS: Property Attributes, writable, enumerable, configurable]

If obj is not a object, it is first converted to a object type.

The return value is a property descriptor.

[see JS: Property Descriptor]

// get the attributes of a property
const x = {"p":4};
console.log( Object.getOwnPropertyDescriptor(x, "p") );
// → { value: 4, writable: true, enumerable: true, configurable: true }


If using ES2015, you should use Reflect.getOwnPropertyDescriptor(obj, key) instead.

[see JS: Reflect.getOwnPropertyDescriptor]


ECMAScript® 2016 Language Specification#sec-object.getownpropertydescriptor

JS Object Property Topic

  1. JS: Property Overview
  2. JS: Property Key
  3. JS: Property Dot Notation / Bracket Notation
  4. JS: Create/Delete Property
  5. JS: Get Property, Set Property
  6. JS: Check Property Existence
  7. JS: Access Property
  8. JS: Property Attributes, writable, enumerable, configurable
  9. JS: Getter/Setter Properties
  10. JS: Property Descriptor

Object and Inheritance Topic

  1. JS: Object Overview
  2. JS: Object Type
  3. JS: Prototype and Inheritance
  4. JS: Create Object
  5. JS: Object Literal Expression
  6. JS: Get/Set Prototype
  7. JS: Create Object with Parent X
  8. JS: Prevent Adding Property
  9. JS: Determine Type of Object
  10. JS: Clone, Deep Copy Object/Array
  11. JS: Test Equality of Objects
  12. JS: Object Object
  13. JS: Object.prototype
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