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01
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What is property descriptor and how is it used with Object.defineProperty?
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A.
When enumerable is true property cannot be deleted; when false it can be deleted
B.
Sets value/writable/enumerable/configurable descriptors; those created with Object.defineProperty default to false
C.
Property descriptor can only be used for class fields; invalid for normal object properties
D.
Object.defineProperty only sets value and writable; other descriptors do not exist
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