本代碼是我幫客戶做的兼職的實例，涉及用node讀取excel文件，遍歷sheets，給單元格設置顏色等操作，希望對大家接活有所幫助。

gen.js

let dir="D:\\武漢煙廠\\山東區域\\備檔資料\\銷區零售終端APP維護清單\\走訪檔案\\2024年6月\\200戶走訪檔案\\";
let dir2="D:\\liujuan\\new_gen\\";const fs = require('fs');
const path = require('path');
const ExcelJS = require('exceljs');// get text in cell
function gv(cell) {let v=cell.value; if(!v) return '';v = (v.richText? v.richText.map(({ text }) => text).join(''): v.toString());return v.trim();
}async function make_console(filename, sheetname, list)
{const FilePath = path.join(dir2, `console_${filename}_${sheetname}.js`);    const file_content=`
let sheet_name="${sheetname}";
let list=${list};let diffs='', diffj=[]; let nl='\\r\\n';
let noinput=document.getElementById('licensenum');
function check_one(list, itemno) 
{ if(itemno>=list.length){ console.log(diffs); console.log(diffj); return; }console.log('checking '+itemno);let item=list[itemno]; let { no }=item; noinput.value=no; queryInfo(); setTimeout(()=>{let diff={no, cols:[]}; let pushed_diff=false;let tbody=document.getElementById('detailTbodyId'); if(!tbody || !tbody.children || tbody.children.length<1 || !tbody.children[0].children || tbody.children[0].children.length<4){ let msg='許可證不存在1: '+no; console.log(msg); diffs+=(msg+nl+nl); diffj.push(diff); check_one(list, itemno+1); return; }let tds=tbody.children[0].children; if(tds[0].innerText.toLowerCase().trim()!=no) { let msg='許可證不存在2: '+no; console.log(msg); diffs+=(msg+nl+nl); diffj.push(diff); check_one(list, itemno+1); return; }if(tds[1].innerText.toLowerCase()!=item.company.toLowerCase()) { if(!pushed_diff) { pushed_diff=true; diffj.push(diff); } diff.cols.push('company'); diffs+=(no+': '+nl+tds[1].innerText+nl+item.company+nl+nl);}if(tds[2].innerText.toLowerCase()!=item.addr.toLowerCase()) { if(!pushed_diff) { pushed_diff=true; diffj.push(diff); } diff.cols.push('addr'); diffs+=(no+': '+nl+tds[2].innerText+nl+item.addr+nl+nl);}if(!tds[3].innerText.toLowerCase().includes(item.date.toLowerCase())) { if(!pushed_diff) { pushed_diff=true; diffj.push(diff); } diff.cols.push('date');  diffs+=(no+': '+nl+tds[3].innerText+nl+item.date+nl+nl);}check_one(list, itemno+1);}, 1000);  
}
check_one(list, 0);
`;fs.writeFileSync(FilePath, file_content);
}async function make_mark(filename, sheetname)
{const FilePath = path.join(dir2, `mark_${filename}_${sheetname}.js`);    const file_content=`
let diffs=
;let filename='${filename}';
let sheet_name="${sheetname}";let dir="D:\\\\武漢煙廠\\\\山東區域\\\\備檔資料\\\\銷區零售終端APP維護清單\\\\走訪檔案\\\\2024年6月\\\\200戶走訪檔案\\\\";const ExcelJS = require('exceljs');
const fs = require('fs');let style_red={font:{color:{ argb: 'FFFF0000'}}};
let style_black={font:{color:{ argb: 'FF000000'}}};
let style_blue={font:{color:{ argb: 'FF0000FF'}}};function gv(cell) {let v=cell.value; if(!v) return '';v = (v.richText? v.richText.map(({ text }) => text).join(''): v.toString());return v.trim();
}async function ProcessSheet(sheet)
{let rows=sheet.rowCount, cols=sheet.columnCount;let found_first_row=false, no_col=0, addr_col=0, date_col=0, company_col=0, result=[];for(let row=1; row<=rows; row++){console.log('row: ', row);let r=sheet.getRow(row);if(found_first_row){let no_cell=r.getCell(no_col), no=gv(no_cell); if(!no){ for(let col=1; col<=cols; col++) r.getCell(col).style=style_black; continue; }let diff; if(diff=diffs.find(d=>d.no==no)){  let dcols=diff.cols;if(dcols.length==0) { for(let col=1; col<=cols; col++) r.getCell(col).style=style_black; no_cell.style=style_blue; continue;}for(let col=1; col<=cols; col++){let cell=r.getCell(col); if((company_col==col && dcols.includes('company'))||(addr_col==col && dcols.includes('addr'))||(date_col==col && dcols.includes('date'))) { cell.style=style_red; }else cell.style=style_black;} }else{  for(let col=1; col<=cols; col++) r.getCell(col).style=style_black;}}else{if(gv(r.getCell(1))=='區域' && gv(r.getCell(3))=='人員'){ // console.log('成功找到區域和人員列');for(let col=3; col<=cols; col++){let cell=r.getCell(col); let v=gv(cell);if(v=='專賣許可證名稱') company_col=col;     else if(v=='地址') addr_col=col;     else if(v=='許可證到期日期') date_col=col;     else if(v=='編號') no_col=col;}if(company_col==0 || addr_col==0 || date_col==0 || no_col==0) {  console.log('未找到指定的4列'); return;  }else { found_first_row=true; console.log('成功找到指定的4列'); }}}} 
}async function ProcessFile(ExcelFilePath)
{const workbook = new ExcelJS.Workbook(); await workbook.xlsx.readFile(ExcelFilePath);let sheets=workbook.worksheets, sheetsCount=sheets.length;for(let sheet_index=0; sheet_index<sheetsCount; sheet_index++){let sheet=sheets[sheet_index]; if(sheet.name==sheet_name) { await ProcessSheet(sheet); break; }}await workbook.xlsx.writeFile(ExcelFilePath);
} 
ProcessFile(dir+filename+'.xlsx');
`;fs.writeFileSync(FilePath, file_content);
}async function traverseFolder(folderPath) {const items = fs.readdirSync(folderPath);for(let item of items){console.log(item);if(item.toLowerCase().includes(".xlsx")){const filename=item.substring(0, item.length-5); const ExcelFilePath = path.join(folderPath, item);      const workbook = new ExcelJS.Workbook(); await workbook.xlsx.readFile(ExcelFilePath);let sheets=workbook.worksheets, sheetsCount=sheets.length;for(let sheet_index=0; sheet_index<sheetsCount; sheet_index++){let sheet=sheets[sheet_index]; console.log(`sheet ${sheet.id}: ${sheet.name}`); //await ProcessSheet(sheet);let rows=sheet.rowCount, cols=sheet.columnCount; console.log(`${rows} rows, ${cols} cols`);let found_first_row=false, no_col=0, addr_col=0, date_col=0, company_col=0, result=[];for(let row=1; row<=rows; row++){let r=sheet.getRow(row);if(found_first_row){let no=gv(r.getCell(no_col)); if(!no) continue;result.push({no, addr: gv(r.getCell(addr_col)), company: gv(r.getCell(company_col)), date: gv(r.getCell(date_col)), });}else{if(r.getCell(1).value=='區域' && r.getCell(3).value=='人員'){ //console.log('成功找到區域和人員列');for(let col=3; col<=cols; col++){let cell=r.getCell(col); let v=gv(cell);if(v=='專賣許可證名稱') company_col=col;     else if(v=='地址') addr_col=col;     else if(v=='許可證到期日期') date_col=col;     else if(v=='編號') no_col=col;               // console.log(`  [${row}, ${col}] ${v}`);}if(company_col==0 || addr_col==0 || date_col==0 || no_col==0) {  console.log('未找到指定的4列'); return;  }else { found_first_row=true; console.log('成功找到指定的4列'); }}}}//console.log(result.length, result[0]);try {await make_console(filename, sheet.name, JSON.stringify(result)); await make_mark(filename, sheet.name);fs.writeFileSync(`${dir2}${filename}_${sheet.name}_差異.txt`, '');} catch (err) {   console.error(err);  }}        }}
}traverseFolder(dir);