Javascript - function to find array that contains all element of other array

// Target is array that has all elements

// Arr is the array to be check to see if it contains all elements 

// every returns true if every value of the array matches the condition

 let array1 = [1,2,3],

    array2 = [1,2,3,4],
    array3 = [1,2];

let checker = (arr, target) => target.every(v => arr.includes(v));

console.log(checker(array2, array1));  // true
console.log(checker(array3, array1));  // false

https://stackoverflow.com/questions/53606337/check-if-array-contains-all-elements-of-another-array