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Object.hasOwn is a static method on the Object constructor in JavaScript. It is used to determine whether an object has a specified property as its own direct property, as opposed to inheriting it from its prototype chain. This method was introduced in ECMAScript 2022.

The syntax for Object.hasOwn is Object.hasOwn(obj, prop). The obj argument is the object to inspect, and the prop argument is the property name or symbol to check for. The method returns a boolean value: true if the object has the specified own property, and false otherwise.

This method is a more robust and safer alternative to Object.prototype.hasOwnProperty. While Object.prototype.hasOwnProperty can be tricked if an object has a property named "hasOwnProperty" itself, or if the object is created using Object.create(null) and thus doesn't inherit from Object.prototype at all, Object.hasOwn avoids these pitfalls. It directly checks the object itself without relying on its prototype chain.

For example, consider an object created with Object.create(null). If you try to use hasOwnProperty on it, it will throw an error. However, Object.hasOwn will correctly return false. Similarly, if you have an object with a property named "hasOwnProperty", Object.prototype.hasOwnProperty might give an incorrect result, whereas Object.hasOwn will always provide the accurate check for a direct property. Therefore, Object.hasOwn is the recommended way to check for own properties in modern JavaScript development.