docx-js/demo/demo32.ts

// Example of how you would merge cells together
// Import from 'docx' rather than '../build' if you install from npm
import * as fs from "fs";
import { Document, Packer, Paragraph } from "../build";

const doc = new Document();

let table = doc.createTable(2, 2);

table.getCell(0, 0).addParagraph(new Paragraph("Hello"));
table.getRow(0).mergeCells(0, 1);

doc.createParagraph("Another table").heading2();

table = doc.createTable(2, 3);
table.getCell(0, 0).addParagraph(new Paragraph("World"));
table.getRow(0).mergeCells(0, 2);

doc.createParagraph("Another table").heading2();

table = doc.createTable(2, 4);
table.getCell(0, 0).addParagraph(new Paragraph("Foo"));

// table.getCell(1, 0).addParagraph(new Paragraph("Bar1"));
// table.getCell(1, 1).addParagraph(new Paragraph("Bar2"));
// table.getCell(1, 2).addParagraph(new Paragraph("Bar3"));
// table.getCell(1, 3).addParagraph(new Paragraph("Bar4"));

// table.getRow(0).mergeCells(0, 3);

const packer = new Packer();

packer.toBuffer(doc).then((buffer) => {
    fs.writeFileSync("My Document.docx", buffer);
});