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Title: Object.defineProperty() - JavaScript | MDN

Open Graph Title: Object.defineProperty() - JavaScript | MDN

Description: The Object.defineProperty() static method defines a new property directly on an object, or modifies an existing property on an object, and returns the object.

Open Graph Description: The Object.defineProperty() static method defines a new property directly on an object, or modifies an existing property on an object, and returns the object.

Opengraph URL: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty

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defineProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty
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Learn more https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility
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Try ithttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#try_it
Syntaxhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#syntax
Descriptionhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#description
Exampleshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#examples
Specificationshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#specifications
Browser compatibilityhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#browser_compatibility
See alsohttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#see_also
Try ithttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#try_it
Syntaxhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#syntax
Parametershttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#parameters
objhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#obj
prophttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#prop
Symbolhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol
descriptorhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#descriptor
Return valuehttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#return_value
Descriptionhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#description
assignmenthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Assignment
for...inhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in
Object.keys()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
deletedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/delete
[[DefineOwnProperty]]https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/defineProperty
[[Set]]https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/set
settershttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/set
configurablehttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#configurable
enumerablehttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#enumerable
valuehttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#value
undefinedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined
writablehttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#writable
assignment operatorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators#assignment_operators
gethttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#get
undefinedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined
undefinedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined
sethttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#set
undefinedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined
undefinedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined
null-prototype objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object#null-prototype_objects
TypeErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
Exampleshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#examples
Creating a propertyhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#creating_a_property
Modifying a propertyhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#modifying_a_property
TypeErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
strict modehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode
Object.assign()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
spreadhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax
Symbolhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol
for...inhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in
Object.keys()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
Enumerability and ownership of propertieshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Enumerability_and_ownership_of_properties
Adding properties and default valueshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#adding_properties_and_default_values
property accessorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_accessors
Custom setters and gettershttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#custom_setters_and_getters
Inheritance of propertieshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#inheritance_of_properties
Specificationshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#specifications
ECMAScript® 2026 Language Specification# sec-object.definepropertyhttps://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.defineproperty
Browser compatibilityhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#browser_compatibility
See alsohttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty#see_also
Enumerability and ownership of propertieshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Enumerability_and_ownership_of_properties
Object.defineProperties()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperties
Object.prototype.propertyIsEnumerable()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable
Object.getOwnPropertyDescriptor()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptor
gethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/get
sethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/set
Object.create()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/create
Reflect.defineProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/defineProperty
Learn how to contributehttps://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started
MDN contributorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty/contributors.txt
View this page on GitHubhttps://github.com/mdn/content/blob/main/files/en-us/web/javascript/reference/global_objects/object/defineproperty/index.md?plain=1
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Standard built-in objectshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
Objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object
Object()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/Object
assign()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
create()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/create
defineProperties()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperties
defineProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty
entries()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries
freeze()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze
fromEntries()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/fromEntries
getOwnPropertyDescriptor()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptor
getOwnPropertyDescriptors()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptors
getOwnPropertyNames()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyNames
getOwnPropertySymbols()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertySymbols
getPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getPrototypeOf
groupBy()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/groupBy
hasOwn()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwn
is()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
isExtensible()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isExtensible
isFrozen()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isFrozen
isSealed()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isSealed
keys()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
preventExtensions()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/preventExtensions
seal()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/seal
setPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/setPrototypeOf
values()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values
__defineGetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__
__defineSetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineSetter__
__lookupGetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupGetter__
__lookupSetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupSetter__
hasOwnProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty
isPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isPrototypeOf
propertyIsEnumerable()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable
toLocaleString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString
toString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString
valueOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf
__proto__https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto
constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor
Object/Functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object
apply()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/apply
bind()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
call()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/call
toString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/toString
[Symbol.hasInstance]()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/Symbol.hasInstance
displayNamehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/displayName
lengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/length
namehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name
prototypehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/prototype
argumentshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/arguments
callerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/caller
__defineGetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__
__defineSetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineSetter__
__lookupGetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupGetter__
__lookupSetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupSetter__
hasOwnProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty
isPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isPrototypeOf
propertyIsEnumerable()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable
toLocaleString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString
toString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString
valueOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf
__proto__https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto
constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor
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Writing guidelines https://developer.mozilla.org/en-US/docs/MDN/Writing_guidelines
MDN Discord https://developer.mozilla.org/discord
MDN on GitHub https://github.com/mdn
Web technologies https://developer.mozilla.org/en-US/docs/Web
Learn web development https://developer.mozilla.org/en-US/docs/Learn_web_development
Guides https://developer.mozilla.org/en-US/docs/MDN/Guides
Tutorials https://developer.mozilla.org/en-US/docs/MDN/Tutorials
Glossary https://developer.mozilla.org/en-US/docs/Glossary
Hacks blog https://hacks.mozilla.org/
https://www.mozilla.org/
Website Privacy Noticehttps://www.mozilla.org/privacy/websites/
Telemetry Settingshttps://www.mozilla.org/en-US/privacy/websites/data-preferences/
Legalhttps://www.mozilla.org/about/legal/terms/mozilla
Community Participation Guidelineshttps://www.mozilla.org/about/governance/policies/participation/
Mozilla Corporation’shttps://www.mozilla.org/
Mozilla Foundationhttps://foundation.mozilla.org/
a Creative Commons licensehttps://developer.mozilla.org/docs/MDN/Writing_guidelines/Attrib_copyright_license

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URLs of crawlers that visited me.