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JavaScript - check if object exists in array and add it if not

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Savannah
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In this article, we would like to show you how to check if object exists in array and add it if not in JavaScript.

Practical example

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In this example, we create a reusable arrow function that takes two arguments:

  1. array to which we want to add an object,
  2. name - the new object's (user) name property.

The function uses some() method to check if an object with a given name already exists and adds it if not.

 

References

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  1. Array.prototype.some() - JavaScript | MDN

Alternative titles

  1. JavaScript - check if object value exists within array of objects and if not add new object to array
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