JavaScript Object.defineProperties()
Example
Add properties:
// Create an Object:
const person = {
firstName: "John",
lastName: "Doe"
};
// Add Properties
Object.defineProperties(person, {
language: {value: "en"},
year: {value: "Hello"}
});
Try it Yourself »
const person = {
firstName: "John",
lastName: "Doe"
};
// Add Properties
Object.defineProperties(person, {
language: {value: "en"},
year: {value: "Hello"}
});
Description
The Object.defineProperties() method adds or changes object properties.
The Object.defineProperties() method lets you change property metadata.
The Object.defineProperties() method lets you add getters and setters.
See more example below.
Related Methods:
Object.defineProperty() adds or changes one property.
Object.defineProperties() adds or changes many properties.
Object.getOwnPropertyNames() returns the property names of an object.
Object.getOwnPropertyDescriptor() returns the descriptor of a property.
Object.getOwnPropertyDescriptors() returns the descriptors of all properties.
Syntax
Object.defineProperty(object, property, descriptor)
Parameters
Parameter
Description
object
Required.
The object to edit.
The object to edit.
property
Required.
The property to edit.
The property to edit.
descriptor
Required.
A descriptor of the properties to be added or changed:
value: value
writable : true|false
enumerable : true|false
configurable : true|false
get : function
set : function
A descriptor of the properties to be added or changed:
value: value
writable : true|false
enumerable : true|false
configurable : true|false
get : function
set : function
Return Value
Type
Description
Object The object beeing passed, with the changes made.
Browser Support
Object.defineProperties() is an ECMAScript5 (ES5 2009) feature.
JavaScript 2009 is supported in all browsers since July 2013:
| Chrome 23 |
IE/Edge 11 |
Firefox 21 |
Safari 6 |
Opera 15 |
| Sep 2012 | Sep 2012 | Apr 2013 | Jul 2012 | Jul 2013 |