How To Remove Duplicates From a JavaScript Object

We can use the Set object to remove duplicates from an array. The Set object lets you store unique values of any type, whether primitive values or object references. This property can be used to store only the objects that are unique in the array. Here's an example of using Set to remove duplicate objects in an array:Set to remove all duplicates in a new array: Set is set to remove the duplicates of an array of objects in the new array. To remove duplicate items in an Array: Set, Set is a Set object.

const books = [
          { title: "C++", author: "Bjarne" },
          { title: "Java", author: "James" },
          { title: "C++", author: "Bjarne" },
          { title: "C++", author: "Bjarne" },
];              
const jsonObj = books.map(JSON.stringify);
const set = new Set(jsonObj);
const uniqueArray = Array.from(set).map(JSON.parse);
console.log(uniqueArray);
/*
[
   { title: "C++", author: "Bjarne" },
   { title: "Java", author: "James" },
]*/