Create variants of all attributes

variants.js

const attrs = [
    ['r', 'g', 'b'],
    ['l', 'm', 's'],
    ['cyan', 'magenta'],
    ['ano', 'ne'],
];

let variants = [];

function createVariants(attrsOfCurrentVariant, providedAttrs) {
    const thisAttr = providedAttrs.shift();

    const length = thisAttr.length;

    for (let i = 0; i < length; i++) {
        const copy = [...attrsOfCurrentVariant];
        copy.push(thisAttr[i]);

        if (providedAttrs.length > 0) {
            createVariants(copy, [...providedAttrs]);
        } else {
            variants.push(copy);
        }
    }
}

createVariants([], attrs);
console.log(variants);
console.log(variants.length);