docx-js/docs/usage/change-tracking.md

Change Tracking

Instead of adding a TextRun into a Paragraph, you can also add an InsertedTextRun or DeletedTextRun where you need to supply an id, author and date for the change.

import { Paragraph, TextRun, InsertedTextRun, DeletedTextRun } from "docx";

const paragraph = new Paragraph({
    children: [
        new TextRun("This is a simple demo "),
        new TextRun({
            text: "on how to "
        }),
        new InsertedTextRun({
            text: "mark a text as an insertion ",
            id: 0,
            author: "Firstname Lastname",
            date: "2020-10-06T09:00:00Z",
        }),
        new DeletedTextRun({
            text: "or a deletion.",
            id: 1,
            author: "Firstname Lastname",
            date: "2020-10-06T09:00:00Z",
        })
    ],
});

Note that for a InsertedTextRun and DeletedTextRun, it is not possible to simply call it with only a text as in new TextRun("some text"), since the additonal fields for change tracking need to be provided. Similar to a normal TextRun you can add additional text properties.

import { Paragraph, TextRun, InsertedTextRun, DeletedTextRun } from "docx";

const paragraph = new Paragraph({
    children: [
        new TextRun("This is a simple demo"),
        new DeletedTextRun({
            text: "with a deletion.",
            color: "red",
            bold: true,
            size: 24,
            id: 0,
            author: "Firstname Lastname",
            date: "2020-10-06T09:00:00Z",
        })
    ],
});

In addtion to marking text as inserted or deleted, change tracking can also be added via the document settings. This will enable new changes to be tracked as well.

import { Document } from "docx";

const doc = new Document({
    features: {
        trackRevisions: true,
    },
});