Set Caret Position in ‘contenteditable’ div that has children

So, I was experiencing the same issue and decided to write my own routine quickly, it walks through all the child nodes recursively and set the position.
Note how this takes a DOM node as argument, not a jquery object as your original post does

// Move caret to a specific point in a DOM element
function SetCaretPosition(el, pos){

    // Loop through all child nodes
    for(var node of el.childNodes){
        if(node.nodeType == 3){ // we have a text node
            if(node.length >= pos){
                // finally add our range
                var range = document.createRange(),
                    sel = window.getSelection();
                range.setStart(node,pos);
                range.collapse(true);
                sel.removeAllRanges();
                sel.addRange(range);
                return -1; // we are done
            }else{
                pos -= node.length;
            }
        }else{
            pos = SetCaretPosition(node,pos);
            if(pos == -1){
                return -1; // no need to finish the for loop
            }
        }
    }
    return pos; // needed because of recursion stuff
}

I hope this’ll help you!