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rolangom/index.js

Last active December 30, 2019 15:22
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Export HTML table to Excel
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index.js
/**
* Taken from a few web snippets
*/
function tableToExcel(table, name = '', filename = "export.xls") {
const uri = 'data:application/vnd.ms-excel;base64,'
, 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><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]--><meta http-equiv="content-type" content="text/plain; charset=UTF-8"/></head><body><table>{table}</table></body></html>'
, base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) }
, 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: name || 'Worksheet',
table: table.innerHTML.replace(/<br\s*\/?>/ig, "\n"),
};
const xls64 = uri + base64(format(template, ctx));
const a = document.createElement("a");
a.href = xls64;
a.download = filename;
document.body.appendChild(a);
a.click();
setTimeout(() => {
document.body.removeChild(a);
}, 0);
};
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