Check if an array contains any element of another array in JavaScript

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Vanilla JS

ES2016:

const found = arr1.some(r=> arr2.includes(r))

ES6:

const found = arr1.some(r=> arr2.indexOf(r) >= 0)

How it works

some(..) checks each element of the array against a test function and returns true if any element of the array passes the test function, otherwise, it returns false. indexOf(..) >= 0 and includes(..) both return true if the given argument is present in the array.

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