//打印操作
    function handlePrint(contentHTML) {
        document.documentElement.innerHTML += `<iframe id='printID'><html><head></head><body></body></html></iframe>`
        var iframe = document.getElementById("printID");
        var iframedoc = iframe.contentDocument || iframe.contentWindow.document;
        var content = contentHTML;
        iframedoc.body.innerHTML = content;
        iframe.contentWindow.print(); //调用打印方法
    }



    // 获取所有的兄弟元素
    function getPreviousSiblings(dom) {
        var arr = [];
        while (dom.previousElementSibling) {
            arr.push(dom.previousElementSibling)
            dom = dom.previousElementSibling;
        }
        return arr;
        console.log(arr)
    }


    function getNextSiblings(dom) {
        var arr = [];
        while (dom.nextElementSibling) {
            arr.push(dom.nextElementSibling)
            dom = dom.nextElementSibling;
        }
        return arr;
    }

    function getAllSiblings(dom) {
        return getNextSiblings(dom).concat(getPreviousSiblings(dom))
    }

    function getParent(dom) {
        var arr = getAllSiblings(dom)
        arr.forEach((item) => {
            item.style.display = "none"
        })
        while (dom.parentElement) {
            var arr = getAllSiblings(dom.parentElement)
            arr.forEach((item) => {
                item.style.display = "none"
            })
            dom = dom.parentElement
        }
        handlePrint(dom.outerHTML)
    }