How to Check if an Object is Empty in JavaScript

Learn how to determine if a variable corresponds to an empty object.

If you need to check whether a value is equal to an empty object created using the object literal syntax const emptyObject = {}, there are several ways to do it.

One method is by using the Object.entries() function, which returns an array containing the enumerable properties of an object. By calling Object.entries(objectToCheck), you can check if it returns an empty array. If it does, it means the object does not have any enumerable properties and can be considered empty. Here’s an example:

Object.entries(objectToCheck).length === 0

Additionally, you can verify that the variable you are checking is indeed an object by ensuring that its constructor is the Object object:

objectToCheck.constructor === Object

Alternatively, you can use the isEmpty() function from the popular lodash library. This function simplifies the process of checking if an object is empty. You can use it like this:

_.isEmpty(objectToCheck)

In summary, these are the methods you can use to check if an object is empty in JavaScript. Choose the one that best suits your needs.