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in javascript, sealing an object is a method used to restrict the ability to add or remove properties from that object. when an object is sealed, it becomes immutable in terms of its structure, meaning no new properties can be added, and existing properties cannot be removed. however, the values of the properties can still be modified if they are not read-only. sealing is achieved using the `object.seal()` method, which effectively locks down the object while allowing for data manipulation within its existing properties. this is particularly useful for maintaining the integrity of objects in applications where consistent behavior is critical. sealed objects can help prevent accidental modification of their structure, making them a valuable tool for developers looking to create more predictable and reliable code. overall, sealing objects fosters better control over the state and behavior of javascript objects within an application.
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