Function addDiv

docs/app/js/sanddance-app.js:6850–6854

(parentElement, className)

    return el;
}
function addDiv(parentElement, className) {
    const div = addEl("div", parentElement);
    if (className) div.className = className;
    return div;
}
function outerSize(el) {
    const cs = getComputedStyle(el);
    const height = parseFloat(cs.marginTop) + parseFloat(cs.paddingTop) + parseFloat(cs.borderTopWidth) + el.offsetHeight + parseFloat(cs.borderBottomWidth) + parseFloat(cs.paddingBottom) + parseFloat(cs.marginBottom);