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.
Browser compatibility:
- The chrome browser supports this feature starting from version 6
- The edge browser supports this feature starting from version 12
- The firefox browser supports this feature starting from version 4
- The safari browser supports this feature starting from version 5.1
Availability: