if element not in array javascript code example

Example 1: check if array does not contain value javascript

var fruits = ["Banana", "Orange", "Apple", "Mango"];

var n = fruits.includes("Mango"); // true

var n = fruits.includes("Django"); // false

Example 2: see if array contains array javascript

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