Export Excel table in VUE project

1. Install three dependency packages: file-saver, XLSX, and Script-loader

npm install -S file-saver xlsx
npm install -D script-loader
Copy the code

2. Create a new folder excel under the SRC file (custom file name) and introduce two JS files (put the code of the two JS files at the end).

Create a utils folder under SRC (this folder is usually used to store public utility functions encapsulated by themselves) and create a tool.js file with the code as follows:

//_tHeader :['name',' gender '] //_filterVal:['name','sex'] //_exData: Content to be exported //_fileName: file name export const export2Excel  = function (_tHeader, _filterVal, _exData, _fileName) { require.ensure([], () => { const { export_json_to_excel } = require(".. /excel/Export2Excel"); // We must use the absolute path const tHeader = _tHeader; // Const filterVal = _filterVal; //const list = exData; const data = formatJson(filterVal, _exData); export_json_to_excel(tHeader, data, _fileName); // Name the exported table as needed}); }; export const formatJson = function (filterVal, jsonData) { return jsonData.map(v => filterVal.map(j => v[j])); };Copy the code

4. Apply it on the page

Bind click events to buttons

<el-button @click="exportToExcel" >Copy the code

The process of introducing encapsulation into the page

import { export2Excel } from "@/utils/tool";
Copy the code

The js code is as follows:

// Export exportToExcel() {this.$confirm(' This operation will export the Excel file. Do you want to continue? {confirmButtonText: 'confirm ', cancelButtonText:' cancel ', type: 'warning'}). This. FilterData. GooutType} / / callback interface exportRunMarket ({data: Params}).then(res => {if (res.code === 0) {if (res.data.length > 0) {const tHeader = [' application type ', 'name ',' department ', 'position ', 'address out', 'start date' and 'return date', 'distance (m)', 'status',' application date ', 'approver', 'approver position', 'approval time', 'for']; Const filterVal = ['gooutType', 'employeeName', 'departmentName', 'positionName', 'runAddress', 'beginRunTime', 'endRunTime', 'distance', 'applyStatus', 'applyTime','approverName','approverPositionName','approverTime','applyReason']; Const list = this.filterTableData(res.data); Export2Excel (tHeader, filterVal, list, "exit record information "); } else {this.$message. Error (" no data to export! ") ); } } else { this.$message.error(res.message); }})}). The catch (() = > {enclosing $message ({type: 'info', the message: 'has cancelled the export'}); }); }, FilterTableData (data) {data.foreach (item => {// takeOffType and transformationType are global custom filters item.goOutType = this.$options.filters["takeOffType"]( item.gooutType, ); item.applyStatus = this.$options.filters["transformationType"]( item.applyStatus, ); }) return data },Copy the code

5. Attach blob. js and Export2Excel. Js code at the end

Blob.js

/* eslint-disable */ /* Blob.js * A Blob implementation. * 2014-05-27 * * By Eli Grey, http://eligrey.com * By Devin Samarin, https://github.com/eboyjr * License: X11/MIT * See LICENSE.md */ /*global self, unescape */ /*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true, plusplus: true */ /*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */ (function (view) { "use strict"; view.URL = view.URL || view.webkitURL; if (view.Blob && view.URL) { try { new Blob; return; } catch (e) {} } // Internally we use a BlobBuilder implementation to base Blob off of // in order to support older browsers that only have BlobBuilder var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function(view) { var get_class = function(object) { return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1]; } , FakeBlobBuilder = function BlobBuilder() { this.data = []; } , FakeBlob = function Blob(data, type, encoding) { this.data = data; this.size = data.length; this.type = type; this.encoding = encoding; } , FBB_proto = FakeBlobBuilder.prototype , FB_proto = FakeBlob.prototype , FileReaderSync = view.FileReaderSync , FileException = function(type) { this.code = this[this.name = type]; }, file_ex_codes = ( "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR " + "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR" ).split(" ") , file_ex_code = file_ex_codes.length , real_URL = view.URL || view.webkitURL || view , real_create_object_URL = real_URL.createObjectURL , real_revoke_object_URL = real_URL.revokeObjectURL , URL = real_URL , btoa = view.btoa , atob = view.atob , ArrayBuffer = view.ArrayBuffer , Uint8Array = view.Uint8Array ; FakeBlob.fake = FB_proto.fake = true; while (file_ex_code--) { FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1; } if (! real_URL.createObjectURL) { URL = view.URL = {}; } URL.createObjectURL = function(blob) { var type = blob.type , data_URI_header ; if (type === null) { type = "application/octet-stream"; } if (blob instanceof FakeBlob) { data_URI_header = "data:" + type; if (blob.encoding === "base64") { return data_URI_header + "; base64," + blob.data; } else if (blob.encoding === "URI") { return data_URI_header + "," + decodeURIComponent(blob.data); } if (btoa) { return data_URI_header + "; base64," + btoa(blob.data); } else { return data_URI_header + "," + encodeURIComponent(blob.data); } } else if (real_create_object_URL) { return real_create_object_URL.call(real_URL, blob); }}; URL.revokeObjectURL = function(object_URL) { if (object_URL.substring(0, 5) ! == "data:" && real_revoke_object_URL) { real_revoke_object_URL.call(real_URL, object_URL); }}; FBB_proto.append = function(data/*, endings*/) { var bb = this.data; // decode data to a binary string if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) { var str = "" , buf = new Uint8Array(data) , i = 0 , buf_len = buf.length ; for (; i < buf_len; i++) { str += String.fromCharCode(buf[i]); } bb.push(str); } else if (get_class(data) === "Blob" || get_class(data) === "File") { if (FileReaderSync) { var fr = new FileReaderSync; bb.push(fr.readAsBinaryString(data)); } else { // async FileReader won't work as BlobBuilder is sync throw new FileException("NOT_READABLE_ERR"); } } else if (data instanceof FakeBlob) { if (data.encoding === "base64" && atob) { bb.push(atob(data.data)); } else if (data.encoding === "URI") { bb.push(decodeURIComponent(data.data)); } else if (data.encoding === "raw") { bb.push(data.data); } } else { if (typeof data ! == "string") { data += ""; // convert unsupported types to strings } // decode UTF-16 to binary string bb.push(unescape(encodeURIComponent(data)));  }}; FBB_proto.getBlob = function(type) { if (! arguments.length) { type = null; } return new FakeBlob(this.data.join(""), type, "raw"); }; FBB_proto.toString = function() { return "[object BlobBuilder]"; }; FB_proto.slice = function(start, end, type) { var args = arguments.length; if (args < 3) { type = null; } return new FakeBlob( this.data.slice(start, args > 1 ? end : this.data.length) , type , this.encoding ); }; FB_proto.toString = function() { return "[object Blob]"; }; FB_proto.close = function() { this.size = this.data.length = 0; }; return FakeBlobBuilder; }(view)); view.Blob = function Blob(blobParts, options) { var type = options ? (options.type || "") : ""; var builder = new BlobBuilder(); if (blobParts) { for (var i = 0, len = blobParts.length; i < len; i++) { builder.append(blobParts[i]); } } return builder.getBlob(type); }; }(typeof self ! == "undefined" && self || typeof window ! == "undefined" && window || this.content || this));Copy the code

Export2Excel.js

/* eslint-disable */ require('script-loader! file-saver'); // require('script-loader! @excel/Blob'); import './Blob' require('script-loader! xlsx/dist/xlsx.core.min'); function generateArray(table) { var out = []; var rows = table.querySelectorAll('tr'); var ranges = []; for (var R = 0; R < rows.length; ++R) { var outRow = []; var row = rows[R]; var columns = row.querySelectorAll('td'); for (var C = 0; C < columns.length; ++C) { var cell = columns[C]; var colspan = cell.getAttribute('colspan'); var rowspan = cell.getAttribute('rowspan'); var cellValue = cell.innerText; if (cellValue ! == "" && cellValue == +cellValue) cellValue = +cellValue; //Skip ranges ranges.forEach(function (range) { if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) { for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null); }}); //Handle Row Span if (rowspan || colspan) { rowspan = rowspan || 1; colspan = colspan || 1; ranges.push({ s: { r: R, c: outRow.length }, e: { r: R + rowspan - 1, c: outRow.length + colspan - 1 } }); }; //Handle Value outRow.push(cellValue ! = = ""? cellValue : null); //Handle Colspan if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null); } out.push(outRow); } return [out, ranges]; }; function datenum(v, date1904) { if (date1904) v += 1462; var epoch = Date.parse(v); return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000); } function sheet_from_array_of_arrays(data, opts) { var ws = {}; var range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } }; for (var R = 0; R ! = data.length; ++R) { for (var C = 0; C ! = data[R].length; ++C) { if (range.s.r > R) range.s.r = R; if (range.s.c > C) range.s.c = C; if (range.e.r < R) range.e.r = R; if (range.e.c < C) range.e.c = C; var cell = { v: data[R][C] }; if (cell.v == null) continue; var cell_ref = XLSX.utils.encode_cell({ c: C, r: R }); if (typeof cell.v === 'number') cell.t = 'n'; else if (typeof cell.v === 'boolean') cell.t = 'b'; else if (cell.v instanceof Date) { cell.t = 'n'; cell.z = XLSX.SSF._table[14]; cell.v = datenum(cell.v); } else cell.t = 's'; ws[cell_ref] = cell; } } if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range); return ws; } function Workbook() { if (! (this instanceof Workbook)) return new Workbook(); this.SheetNames = []; this.Sheets = {}; } function s2ab(s) { var buf = new ArrayBuffer(s.length); var view = new Uint8Array(buf); for (var i = 0; i ! = s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF; return buf; } export function export_table_to_excel(id) { var theTable = document.getElementById(id); console.log('a') var oo = generateArray(theTable); var ranges = oo[1]; /* original data */ var data = oo[0]; var ws_name = "SheetJS"; console.log(data); var wb = new Workbook(), ws = sheet_from_array_of_arrays(data); /* add ranges to worksheet */ // ws['!cols'] = ['apple', 'banan']; ws['!merges'] = ranges; /* add worksheet to workbook */ wb.SheetNames.push(ws_name); wb.Sheets[ws_name] = ws; var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' }); saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), "test.xlsx") } function formatJson(jsonData) { console.log(jsonData) } export function export_json_to_excel(th, jsonData, defaultTitle) { /* original data */ var data = jsonData; data.unshift(th); var ws_name = "SheetJS"; var wb = new Workbook(), ws = sheet_from_array_of_arrays(data); /* add worksheet to workbook */ wb.SheetNames.push(ws_name); wb.Sheets[ws_name] = ws; var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' }); Var title = defaultTitle | | 'list' saveAs (new Blob ([s2ab (wbout)] and {type: "application/octet-stream" }), title + ".xlsx") }Copy the code