js获取鼠标选中内容的p标签

document.addEventListener('mouseup', function() {
    // 获取选中的内容
    const selection = window.getSelection();
    if (selection.rangeCount > 0) {
        const range = selection.getRangeAt(0);
        // 获取包含选中内容的父节点
        const container = range.commonAncestorContainer;
        // 遍历父节点，找到最近的<p>标签
        let pTag = null;
        while (container && container.nodeType !== Node.ELEMENT_NODE) {
            container = container.parentNode;
        }
        while (container && container.nodeName !== 'P') {
            container = container.parentNode;
        }
        if (container) {
            pTag = container;
        }
        console.log(pTag);
    }
});