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
TheObject.defineProperties() method adds or changes object properties.
TheObject.defineProperties() method lets you change property metadata.
TheObject.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. |
| property | Required. 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 |
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 sinceJuly 2013:
| Chrome 23 | IE/Edge 11 | Firefox 21 | Safari 6 | Opera 15 |
| Sep 2012 | Sep 2012 | Apr 2013 | Jul 2012 | Jul 2013 |
