verificar que existan skus

skus.js

function verificar() {
    const arr1_skus = arr1.rate.items.map(arr => arr.sku);
    const skus = ['1', '2', '3', '4', '5'];

    let checks = 0;
    arr1_skus.map(sku => skus.includes(sku) && (checks = checks + 1));

    return checks === arr1_skus.length ? true : false;
}