Object.isSealed()

Term side of the Card
Topic: Object
Unit title: Object.isSealed()
Categories: Method
Explanation side of the Card

Explanation: The static method that determines if an object is sealed, meaning whether it's non-extensible and its properties are non-configurable. A sealed object cannot have new properties added to it and existing properties cannot be removed, although existing properties can still be modified.

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  • The safari browser supports this feature starting from version 5.1
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