Your examples here will check if the property exists in the object itself OR in its prototype chain. To check if the property is on the object itself, you could check if it appears in Object.keys(obj), or use .hasOwnProperty(key) on the Object itself
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Your examples here will check if the property exists in the object itself OR in its prototype chain. To check if the property is on the object itself, you could check if it appears in
Object.keys(obj), or use.hasOwnProperty(key)on the Object itself