如何在contentEditable目录中返回选中文本的元素？

function getSelectedElement() {
    var selection = window.getSelection();
    if (selection.rangeCount > 0) {
        var range = selection.getRangeAt(0);
        var startNode = range.startContainer;
        var startOffset = range.startOffset;

        // 遍历DOM树找到选中文本所在的元素
        var node = startNode;
        while (node.nodeType !== Node.ELEMENT_NODE || node === document.body) {
            node = node.parentNode;
        }
        return node;
    }
    return null;
}

// 使用方法
var selectedElement = getSelectedElement();
if (selectedElement) {
    console.log('Selected element:', selectedElement);
} else {
    console.log('No selection found.');
}