element-ui之el-table的简单导出excel

• 第一步，依赖两个node包

npm install --save xlsx file-saver

•  第二步，引入两个包

import FileSaver from 'file-saver'
import XLSX from 'xlsx'

• 第三步，按钮绑定该函数

 exportExcel(domId, fileName) {
            let wb = XLSX.utils.table_to_book(document.querySelector('#' + domId));
            let wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: true, type: 'array' });
            try {
                FileSaver.saveAs(new Blob([wbout], { type: 'application/octet-stream' }), fileName + '.xlsx');
            } catch (e) {
                if (typeof console !== 'undefined')
                    console.log(e, wbout)
            }
            return wbout;
        },