Match arrays in JavaScript

Check if array A has all elements of array B

let a = [1,2,3], 
    b = [1,2,3,4], 
    c = [1,2];

let checkEvery = (arr, target) => target.every(el => arr.includes(el));

console.log(checkEvery(b, a))       // true
console.log(checkEvery(c, a))       // false

Check if array A has any elements of array B

let a = [1,2,3], 
    b = [1,2,3,4], 
    c = [8,9];

let checkAny = (arr, target) => target.some(el => arr.includes(el));

console.log(checkEvery(b, a))       // true
console.log(checkEvery(c, a))       // false