Move an element from one place to another based on browser/device width

moveElementOnWidth.js

let breakPoint = 768
let moveThis = document.querySelector('.nodeToMove')
let newParent = document.querySelector('.newParentNode')
let origin = document.querySelector('.originalParentNode')

const moveTheNode = () => {
    let viewportWidth = window.innerWidth || document.documentElement.clientWidth;
    if (viewportWidth < breakPoint) {
        newParent.after(moveThis)
    } else {
        origin.prepend(moveThis)
    }
}

window.addEventListener('resize', moveTheNode);
window.onload = moveTheNode