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Object Property Attributes

| attribute name | meaning | |------------------|----------------------------------------------------------------------------------------------------------------------------------| | value | The property's value. | | writable | true or false. Whether the property's value can be written to. (For example, o["p"] = 1) | | enumerable | true or false. Whether the property shows in some loop constructs, such as for (var x in o) {…} and Object.keys(o). | | configurable | true or false. Whether the property can be deleted (For example, delete o["p"]) and whether its attributes can be changed. |