I'm trying to get all classes from one element, then add them to another element created dynamically. I was originally stuck on how to do this, but as I was typing out this question, I worked out a solution. However, it seems a bit verbose. Is there a way to do this same thing more efficiently, i.e. with fewer lines of code?

    let classes = this.nextElementSibling.classList;      // get classes from target element
    classes += '';                                        // convert classlist object to string
    let class_array = classes.split(' ');                 // convert string to array
    const my_div = document.createElement('div');         // create a new div
    for(i=0; i<class_array.length; i++) {                 // loop through array and add classes to the div
      my_div.classList.add(class_array[i]);
    }

Thanks in advance.