docx-js/demo/12-scaling-images.ts

// Scaling images
// Import from 'docx' rather than '../build' if you install from npm
import * as fs from "fs";
import { Document, ImageRun, Packer, Paragraph } from "../build";

const doc = new Document();

doc.addSection({
    children: [
        new Paragraph("Hello World"),
        new Paragraph({
            children: [
                new ImageRun({
                    data: fs.readFileSync("./demo/images/pizza.gif"),
                    transformation: {
                        width: 50,
                        height: 50,
                    },
                }),
            ],
        }),
        new Paragraph({
            children: [
                new ImageRun({
                    data: fs.readFileSync("./demo/images/pizza.gif"),
                    transformation: {
                        width: 100,
                        height: 100,
                    },
                }),
            ],
        }),
        new Paragraph({
            children: [
                new ImageRun({
                    data: fs.readFileSync("./demo/images/pizza.gif"),
                    transformation: {
                        width: 250,
                        height: 250,
                    },
                }),
            ],
        }),
        new Paragraph({
            children: [
                new ImageRun({
                    data: fs.readFileSync("./demo/images/pizza.gif"),
                    transformation: {
                        width: 400,
                        height: 400,
                    },
                }),
            ],
        }),
    ],
});

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