export function tableToExcel(tableId, buttonId, fileName) {
let table = document.getElementById(tableId)
if(table === null || table === undefined) {
table = document.getElementsByTagName('table')[0]
}
// 克隆（複製）此table元素，這樣對複製品進行修改（如添加或改變table的標題等），導出複製品，而不影響原table在瀏覽器中的展示。
// table = table.cloneNode(true)
const uri = 'data:application/vnd.ms-excel;base64,'
const template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><?xml version="1.0" encoding="UTF-8" standalone="yes"?><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body><table style="vnd.ms-excel.numberformat:@">{table}</table></body></html>'
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]
})
}
if(!table.nodeType) table = document.getElementById(table)
const ctx = {
worksheet: '',
table: table.innerHTML
}
// window.location.href = uri + base64(format(template, ctx))
if(buttonId === null || buttonId === undefined) {
const dom_a = document.createElement('a') // 1、創建元素
dom_a.style.visibility = 'hidden'
table.insertBefore(dom_a, table.childNodes[0]) // 插入到最左邊
dom_a.href = uri + base64(format(template, ctx))
dom_a.download = fileName
dom_a.click()
} else {
document.getElementById(buttonId).href = uri + base64(format(template, ctx))
document.getElementById(buttonId).download = fileName
}
}
jsp導出當頁表格到excel
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