Function addChild

docs/app/js/sanddance-app.js:6685–6690

(parentElement, child)

    return arr.join(";");
}
function addChild(parentElement, child) {
    if (child === null || child === undefined || typeof child === "boolean") return;
    else if (Array.isArray(child)) appendChildren(parentElement, child);
    else if (isElement(child)) parentElement.appendChild(child);
    else parentElement.appendChild(document.createTextNode(child.toString()));
}
function appendChildren(parentElement, children) {
    children.forEach((child)=>addChild(parentElement, child));
}