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The Object.keys() method in JavaScript is a static method that returns an array of a given object's own enumerable string-keyed property names. This method is useful for iterating over the properties of an object and performing operations on them.
Syntax
Object.keys(obj)obj: The object whose enumerable property names are to be returned.
Return Value
The method returns an array of strings representing the given object's own enumerable string-keyed property keys12.
Description
Object.keys() returns an array whose elements are strings corresponding to the enumerable string-keyed property names found directly upon the object. This is similar to iterating with a for...in loop, except that a for...in loop enumerates properties in the prototype chain as well. The order of the array returned by Object.keys() is the same as that provided by a for...in loop12.
JavaScript Object.keys() Method - W3Schools
The Object.keys() method returns an array with the keys of an object. The Object.keys() method does not change the original object.
- object: Required.An iterable object.
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Object.keys() - JavaScript | MDN - MDN Web Docs
- The Object.keys() static method returns an array of a given object's own enumerable string-keyed property names.
How do I check if an object has a key in JavaScript?
The in operator matches all object keys, including those in the object's prototype chain. Use myObj.hasOwnProperty('key') to check an object's own keys and will only return true if key is …
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JavaScript Object Keys Tutorial – How to Use a JS Key …
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Jun 27, 2021 · Object.keys (obj) – returns an array of keys. Object.values (obj) – returns an array of values. Object.entries (obj) – returns an array of [key, value] pairs. Please note the …
JavaScript Object keys() Method - GeeksforGeeks
Jul 12, 2024 · The Object.keys() method in JavaScript is used to retrieve an array of the enumerable property names of an object. It returns an array containing the keys of the object. …
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Jul 25, 2022 · In this article, we will learn the various methods to check if an object's key exists in JavaScript. In case you are in a rush, here are the two standard methods we can use to check: // Using hasOwnProperty() method . …
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What does the Object.keys (obj) method do in JavaScript? It returns an array of the object’s property names. It directly modifies the original object. It deletes the objects in an array. It …
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