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+import { saveAs } from "file-saver";
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+import * as XLSX from "xlsx";
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+
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+function generateArray(table) {
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+ var out = [];
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+ var rows = table.querySelectorAll("tr");
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+ var ranges = [];
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+ for (var R = 0; R < rows.length; ++R) {
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+ var outRow = [];
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+ var row = rows[R];
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+ var columns = row.querySelectorAll("td");
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+ for (var C = 0; C < columns.length; ++C) {
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+ var cell = columns[C];
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+ var colspan = cell.getAttribute("colspan");
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+ var rowspan = cell.getAttribute("rowspan");
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+ var cellValue = cell.innerText;
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+ if (cellValue !== "" && cellValue === +cellValue) cellValue = +cellValue;
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+
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+ //Skip ranges
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+ ranges.forEach(function (range) {
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+ if (
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+ R >= range.s.r &&
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+ R <= range.e.r &&
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+ outRow.length >= range.s.c &&
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+ outRow.length <= range.e.c
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+ ) {
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+ for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
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+ }
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+ });
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+
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+ //Handle Row Span
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+ if (rowspan || colspan) {
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+ rowspan = rowspan || 1;
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+ colspan = colspan || 1;
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+ ranges.push({
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+ s: {
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+ r: R,
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+ c: outRow.length,
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+ },
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+ e: {
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+ r: R + rowspan - 1,
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+ c: outRow.length + colspan - 1,
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+ },
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+ });
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+ }
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+
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+ //Handle Value
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+ outRow.push(cellValue !== "" ? cellValue : null);
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+
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+ //Handle Colspan
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+ if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
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+ }
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+ out.push(outRow);
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+ }
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+ return [out, ranges];
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+}
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+
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+function datenum(v, date1904) {
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+ if (date1904) v += 1462;
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+ var epoch = Date.parse(v);
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+ return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
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+}
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+
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+function sheet_from_array_of_arrays(data, opts) {
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+ var ws = {};
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+ var range = {
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+ s: {
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+ c: 10000000,
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+ r: 10000000,
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+ },
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+ e: {
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+ c: 0,
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+ r: 0,
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+ },
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+ };
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+ for (var R = 0; R != data.length; ++R) {
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+ for (var C = 0; C != data[R].length; ++C) {
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+ if (range.s.r > R) range.s.r = R;
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+ if (range.s.c > C) range.s.c = C;
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+ if (range.e.r < R) range.e.r = R;
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+ if (range.e.c < C) range.e.c = C;
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+ var cell = {
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+ v: data[R][C],
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+ };
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+ if (cell.v == null) continue;
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+ var cell_ref = XLSX.utils.encode_cell({
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+ c: C,
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+ r: R,
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+ });
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+
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+ if (typeof cell.v === "number") cell.t = "n";
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+ else if (typeof cell.v === "boolean") cell.t = "b";
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+ else if (cell.v instanceof Date) {
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+ cell.t = "n";
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+ cell.z = XLSX.SSF._table[14];
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+ cell.v = datenum(cell.v);
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+ } else cell.t = "s";
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+
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+ ws[cell_ref] = cell;
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+ }
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+ }
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+ if (range.s.c < 10000000) ws["!ref"] = XLSX.utils.encode_range(range);
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+ return ws;
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+}
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+
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+function Workbook() {
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+ if (!(this instanceof Workbook)) return new Workbook();
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+ this.SheetNames = [];
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+ this.Sheets = {};
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+}
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+
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+function s2ab(s) {
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+ var buf = new ArrayBuffer(s.length);
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+ var view = new Uint8Array(buf);
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+ for (var i = 0; i !== s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
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+ return buf;
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+}
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+
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+export function export_table_to_excel(id) {
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+ var theTable = document.getElementById(id);
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+ var oo = generateArray(theTable);
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+ var ranges = oo[1];
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+
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+ /* original data */
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+ var data = oo[0];
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+ var ws_name = "SheetJS";
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+
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+ var wb = new Workbook(),
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+ ws = sheet_from_array_of_arrays(data);
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+
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+ /* add ranges to worksheet */
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+ // ws['!cols'] = ['apple', 'banan'];
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+ ws["!merges"] = ranges;
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+
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+ /* add worksheet to workbook */
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+ wb.SheetNames.push(ws_name);
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+ wb.Sheets[ws_name] = ws;
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+
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+ var wbout = XLSX.write(wb, {
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+ bookType: "xlsx",
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+ bookSST: false,
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+ type: "binary",
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+ });
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+
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+ saveAs(
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+ new Blob([s2ab(wbout)], {
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+ type: "application/octet-stream",
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+ }),
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+ "test.xlsx"
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+ );
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+}
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+
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+export function export_json_to_excel({
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+ multiHeader = [],
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+ header,
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+ data,
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+ filename,
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+ merges = [],
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+ autoWidth = true,
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+ bookType = "xlsx",
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+} = {}) {
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+ /* original data */
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+ filename = filename || "excel-list";
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+ data = [...data];
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+ data.unshift(header);
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+
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+ for (let i = multiHeader.length - 1; i > -1; i--) {
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+ data.unshift(multiHeader[i]);
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+ }
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+
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+ var ws_name = "Sheet1";
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+ var wb = new Workbook(),
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+ ws = sheet_from_array_of_arrays(data);
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+
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+ if (merges.length > 0) {
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+ if (!ws["!merges"]) ws["!merges"] = [];
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+ merges.forEach((item) => {
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+ ws["!merges"].push(XLSX.utils.decode_range(item));
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+ });
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+ }
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+
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+ if (autoWidth) {
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+ /*设置worksheet每列的最大宽度*/
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+ const colWidth = data.map((row) =>
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+ row.map((val) => {
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+ /*先判断是否为null/undefined*/
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+ if (val == null) {
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+ return {
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+ wch: 10,
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+ };
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+ } else if (val.toString().charCodeAt(0) > 255) {
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+ /*再判断是否为中文*/
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+ return {
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+ wch: val.toString().length * 2,
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+ };
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+ } else {
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+ return {
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+ wch: val.toString().length,
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+ };
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+ }
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+ })
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+ );
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+ /*以第一行为初始值*/
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+ let result = colWidth[0];
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+ for (let i = 1; i < colWidth.length; i++) {
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+ for (let j = 0; j < colWidth[i].length; j++) {
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+ if (result[j]["wch"] < colWidth[i][j]["wch"]) {
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+ result[j]["wch"] = colWidth[i][j]["wch"];
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+ }
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+ }
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+ }
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+ ws["!cols"] = result;
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+ }
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+
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+ /* add worksheet to workbook */
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+ wb.SheetNames.push(ws_name);
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+ wb.Sheets[ws_name] = ws;
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+
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+ var wbout = XLSX.write(wb, {
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+ bookType: bookType,
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+ bookSST: false,
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+ type: "binary",
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+ });
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+ saveAs(
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+ new Blob([s2ab(wbout)], {
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+ type: "application/octet-stream",
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+ }),
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+ `${filename}.${bookType}`
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+ );
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+}
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