JS Object freezing, sealing, extending the same and different points

Object.freezed () freeze check function Object.isfrozen (obj)

Object.seal () seal check function object.issealed (obj)

object.preventextensions () extension check function object.isextensible (obj)

Common:

Cannot add a new property
(One exception is when a property is an object, you can add a property on that child property (because the object is a reference type).)

Different points:

Object.freezed () and object.seal () cannot delete existing properties, cannot modify the enumerable, configurable, writable

Object.preventextensions () can delete an existing property

Object.freezed () cannot modify the value of an existing property

Object.seal () and object.preventextensions () can modify the value of an existing property

JS Object freezing, sealing, extending the same and different points