contentEditable insert element and focus behind it.

gistfile1.txt

      const container = document.querySelector(".pell-content");
      let selection = window.getSelection();
      let range = selection.getRangeAt(0);
      let dom = HTML`<div id="node"><span style="color:red">${selection.toString()}</span></div>`;
      selection.deleteFromDocument();
      range.insertNode(dom);
      ///Insert first node
      range.setStartAfter(dom);
      range.setEndAfter(dom);
      selection.removeAllRanges();
      selection.addRange(range);
      //Focus behind it.
      range.insertNode(HTML`<span>Iöötab raisk</span>`);
      //Insert next node.