关于div可编辑的复制粘贴问题

 todoFilter(e) {
                e.preventDefault();
                if (!e.target.getAttribute('contenteditable')) {
                    return;
                }
                const cpTxt = e
                    .clipboardData
                    .getData('text');
    
                const selection = window.getSelection ? window.getSelection() : document.selection;
                if (!selection.rangeCount) return;
                const range = selection.createRange ? selection.createRange() : selection.getRangeAt(0);
                window._range = range;
                if (!window.getSelection) {
                    range.pasteHTML(cpTxt);
                    range.collapse(false);
                    range.select();
                } else {
                    range.collapse(false);
                    const hasR = range.createContextualFragment(cpTxt);
                    let hasR_lastChild = hasR.lastChild;
                    while (hasR_lastChild && hasR_lastChild.nodeName.toLowerCase() == 'br' && hasR_lastChild.previousSibling && hasR_lastChild.previousSibling.nodeName.toLowerCase() == 'br') {
                        var e = hasR_lastChild;
                        hasR_lastChild = hasR_lastChild.previousSibling;
                        hasR.removeChild(e);
                    }
                    range.insertNode(hasR);
                    if (hasR_lastChild) {
                        range.setEndAfter(hasR_lastChild);
                        range.setStartAfter(hasR_lastChild);
                    }
                    selection.removeAllRanges();
                    selection.addRange(range);
                }
            },