combine two lists of tailwind classes

combine.js

function combineTailwind(first, second) {
    const secondSplit = second.split(" ")
    let classes = [];
    
    const secondIds = secondSplit.map(z => z.split("-")[0]);

    for(const defaultClass of first.split(" ")) {
        if(!secondIds.includes(defaultClass.split("-")[0])) {
            classes.push(defaultClass);
        }
    }

    return classes.concat(secondSplit).join(" ")
}