how to get innerHTML from event code example

Example 1: how to innerhtml is empty

element.innerHTML.length == 0 ? element.appendChild(createdEl) : (element.innerHTML = '', modalNote.appendChild(createdEl));

Example 2: javascript create node from innerhtml

function createElement( str ) {
    var frag = document.createDocumentFragment();

    var elem = document.createElement('div');
    elem.innerHTML = str;

    while (elem.childNodes[0]) {
        frag.appendChild(elem.childNodes[0]);
    }
    return frag;
}