by Sai gowtham

How to get the intersection of two arrays in JavaScript

In JavaScript, we can use the filter() method and includes() method to get the intersection of two arrays.

Here is an example, that returns the intersection of arr1 and arr2 which is [4, 6]:

const arr1 = [4,5,6,7];
const arr2 = [4,6,1,3];

const intersection = arr1.filter(val=>arr2.includes(val));

console.log(intersection); // [4,6]

Similarly, we can also find it like this.

const arr1 = [4,5,6,7];
const arr2 = [4,6,1,3];

const intersection = arr1.filter(val=>arr2.indexOf(val)<-1);

console.log(intersection); // [4,6]

Top Udemy Courses

JavaScript - The Complete Guide 2020 (Beginner + Advanced)
JavaScript - The Complete Guide 2020 (Beginner + Advanced)
45,614 students enrolled
52 hours of video content
View Course
React - The Complete Guide (incl Hooks, React Router, Redux)
React - The Complete Guide (incl Hooks, React Router, Redux)
284,472 students enrolled
40 hours of video content
View Course
Vue JS 2 - The Complete Guide (incl. Vue Router & Vuex)
Vue JS 2 - The Complete Guide (incl. Vue Router & Vuex)
130,921 students enrolled
21 hours of video content
View Course