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##  See also

  * [ ` Object.isSealed() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isSealed)
  * [ ` Object.preventExtensions() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/preventExtensions)
  * [ ` Object.isExtensible() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isExtensible)
  * [ ` Object.freeze() ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze)
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