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Title: preventExtensions · WebPlatform Docs

Description: Prevents the addition of new properties to an object.

direct link

Domain: webplatform.github.io

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Links:

https://webplatform.github.io/
THE DOCShttps://webplatform.github.io/
CONNECThttps://webplatform.github.io/docs/Community
CONTRIBUTEhttps://webplatform.github.io/docs/WPD/Contributors_Guide/
BLOGhttps://webplatform.github.io/blog/
githubhttps://github.com/webplatform/webplatform.github.io/
DOCShttps://webplatform.github.io/
javascripthttps://webplatform.github.io/docs/javascript/
Objecthttps://webplatform.github.io/docs/javascript/Object/
preventExtensionshttps://webplatform.github.io/docs/javascript/Object/preventExtensions/
Object.defineProperty Functionhttps://webplatform.github.io/docs/javascript/Object/defineProperty
Object.sealhttps://webplatform.github.io/docs/javascript/Object/seal
Object.freezehttps://webplatform.github.io/docs/javascript/Object/freeze
Object.isExtensiblehttps://webplatform.github.io/docs/javascript/Object/isExtensible
Object.isSealedhttps://webplatform.github.io/docs/javascript/Object/isSealed
Object.isFrozenhttps://webplatform.github.io/docs/javascript/Object/isFrozen
Object.seal Functionhttps://webplatform.github.io/docs/javascript/Object/seal
Object.freeze Functionhttps://webplatform.github.io/docs/javascript/Object/freeze
Object.isExtensible Functionhttps://webplatform.github.io/docs/javascript/Object/isExtensible
Object.isSealed Functionhttps://webplatform.github.io/docs/javascript/Object/isSealed
Object.isFrozen Functionhttps://webplatform.github.io/docs/javascript/Object/isFrozen
Articlehttp://msdn.microsoft.com/en-us/library/ie/ff806191(v=vs.94).aspx
Beginnershttps://webplatform.github.io/docs/Beginners
Conceptshttps://webplatform.github.io/docs/concepts
HTMLhttps://webplatform.github.io/docs/html
CSShttps://webplatform.github.io/docs/css
Accessibilityhttps://webplatform.github.io/docs/concepts/accessibility
JavaScripthttps://webplatform.github.io/docs/javascript
DOMhttps://webplatform.github.io/docs/dom
SVGhttps://webplatform.github.io/docs/svg
https://github.com/webplatform/docs/blob/master/LICENSE.md
WebPlatform.orghttps://webplatform.github.io/

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