// 导出Excel方法（表格id，不加扩展名的文件名，sheet名）
export function exportExcelMethod(tableId, fileName, sheetName) {
tableToExcel(tableId, fileName, sheetName)
}
const tableToExcel = (function() {
const uri = 'data:application/vnd.ms-excel;base64,'
// 设置导出表格的单元格默认高度/宽度/边框样式/字体颜色/背景颜色/居中，网页显示表格宽度建议1240，tr/td视情况而定
const template = `{worksheet}`
const base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) }
const format = function(s, c) { return s.replace(/{(\w+)}/g, function(m, p) { return c[p] }) }
return function(table, filename, sheetname) {
if (!table.nodeType) table = document.getElementById(table)
const ctx = { worksheet: sheetname || 'Worksheet', table: table.innerHTML }
const aTag = document.createElement('a')
aTag.href = uri + base64(format(template, ctx))
aTag.download = filename
aTag.click()
}
})()