js导出数据为excel表

/**
 * 导出 excel
 */
/* eslint-disable */
let idTmr;
const getExplorer = () => {
    let explorer = window.navigator.userAgent;
    //ie
    if (explorer.indexOf("MSIE") >= 0) {
        return 'ie';
    }
    //firefox

    else if (explorer.indexOf("Firefox") >= 0) {
        return 'Firefox';
    }
    //Chrome
    else if (explorer.indexOf("Chrome") >= 0) {
        return 'Chrome';
    }
    //Opera
    else if (explorer.indexOf("Opera") >= 0) {
        return 'Opera';
    }
    //Safari
    else if (explorer.indexOf("Safari") >= 0) {
        return 'Safari';
    }
}
// 判断浏览器是否为IE
const exportToExcel = (data,name) => {

    // 判断是否为IE
    if (getExplorer() == 'ie') {
        tableToIE(data, name)
    } else {
        tableToNotIE(data,name)
    }
}

const Cleanup = () => {
    window.clearInterval(idTmr);
}

// ie浏览器下执行
const tableToIE = (data, name) => {
    let curTbl = data;
    let oXL = new ActiveXObject("Excel.Application");

    //创建AX对象excel
    let oWB = oXL.Workbooks.Add();
    //获取workbook对象
    let xlsheet = oWB.Worksheets(1);
    //激活当前sheet
    let sel = document.body.createTextRange();
    sel.moveToElementText(curTbl);
    //把表格中的内容移到TextRange中
    sel.select;
    //全选TextRange中内容
    sel.execCommand("Copy");
    //复制TextRange中内容
    xlsheet.Paste();
    //粘贴到活动的EXCEL中

    oXL.Visible = true;
    //设置excel可见属性

    try {
        let fname = oXL.Application.GetSaveAsFilename("Excel.xls", "Excel Spreadsheets (*.xls), *.xls");
    } catch (e) {
        print("Nested catch caught " + e);
    } finally {
        oWB.SaveAs(fname);

        oWB.Close(savechanges = false);
        //xls.visible = false;
        oXL.Quit();
        oXL = null;
        // 结束excel进程，退出完成
        window.setInterval("Cleanup();", 1);
        idTmr = window.setInterval("Cleanup();", 1);
    }
}

// 非ie浏览器下执行
const tableToNotIE = (function() {
    // 编码要用utf-8不然默认gbk会出现中文乱码
    let uri = 'data:application/vnd.ms-excel;base64,',
        template = '{table}',
        base64 = function(s) {
            return window.btoa(unescape(encodeURIComponent(s)));

        },

        format = (s, c) => {
            return s.replace(/{(\w+)}/g,
                (m, p) => {
                    return c[p];
                })
        }
    return (table, name) => {
        let ctx = {
            worksheet: name,
            table
        }

        //创建下载
        let link = document.createElement('a');
        link.setAttribute('href', uri + base64(format(template, ctx)));

        link.setAttribute('download', name+'.xls');


        // window.location.href = uri + base64(format(template, ctx))
        link.click();
    }
})()

// 导出函数
const export2Excel = (theadData, tbodyData, dataname) => {

    let re = /http/ // 字符串中包含http,则默认为图片地址
    let th_len = theadData.length // 表头的长度
    let tb_len = tbodyData.length // 记录条数
    let width = 40 // 设置图片大小
    let height = 60

    // 添加表头信息
    let thead = ''
    for (let i = 0; i < th_len; i++) {
        thead += '' + theadData[i] + ''
    }
    thead += ''

    // 添加每一行数据
    let tbody = ''
    for (let i = 0; i < tb_len; i++) {
        tbody += ''
        let row = tbodyData[i] // 获取每一行数据

        for (let key in row) {
            if (re.test(row[key])) { // 如果为图片，则需要加div包住图片
                //
                tbody += '
'
            } else {
                tbody += '' + row[key] + ''
            }
        }
        tbody += ''
    }
    tbody += ''

    let table = thead + tbody

    // 导出表格
    exportToExcel(table, dataname)
}

export default export2Excel