In this tutorial, we'll explore the intricacies of the
hasOwnProperty() method, learn how to check if a property exists in an object, and understand the distinction between an object's key and
gadget has its own
price property, but
toString is inherited from the Object prototype, hence
hasOwnProperty() gives you more precision by ignoring the prototype's properties.
This check is particularly useful when iterating over object keys using a
for...in loop, allowing you to focus only on the object's own properties.
Understanding the difference between object keys and
Object.keys(obj), which lists all enumerable property names. But it doesn't tell you if those properties are inherited or not. That's where
hasOwnProperty() comes in, helping you discern if those keys are indeed the object's own.
hasOwnProperty itself is not an own property since it's inherited from the Object prototype.
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