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Object.isExtensible()

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

Explanation: The static method that determines if an object is extensible, meaning whether new properties can be added to it. This is useful for checking whether an object has been made non-extensible by methods like `.preventExtensions()`.

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: