Nambahake tandha banyu menyang PDF utawa mbusak tandha banyu sing sadurunge ditambahake nggunakake JavaScript

import * as fs from "fs";

const wordsApi = new WordsApi("####-####-####-####-####", "##################");

const requestDocument = fs.createReadStream("Input.pdf");
const requestWatermarkText = new model.WatermarkText({
    text: "This is the watermark text.",
    rotationAngle: 90
})
const insertWatermarkTextOnline = new model.InsertWatermarkTextOnlineRequest({
    document: requestDocument,
    watermarkText: requestWatermarkText
});

wordsApi.insertWatermarkTextOnline(insertWatermarkTextOnline)
.then((insertWatermarkTextOnlineResult) => {
    console.log("Result of InsertWatermarkTextOnline: ", insertWatermarkTextOnlineResult);

    const requestDocument = insertWatermarkTextOnlineResult.Document.Values();
    const convertDocument = new model.ConvertDocumentRequest({
        document: requestDocument,
        format: "pdf"
    });

    wordsApi.convertDocument(convertDocument)
    .then((convertDocumentResult) => {
        console.log("Result of ConvertDocument: ", convertDocumentResult);
    });
});

import * as fs from "fs";

const wordsApi = new WordsApi("####-####-####-####-####", "##################");

const requestDocument = fs.createReadStream("Input.pdf");
const deleteWatermarkOnline = new model.DeleteWatermarkOnlineRequest({
    document: requestDocument
});

wordsApi.deleteWatermarkOnline(deleteWatermarkOnline)
.then((deleteWatermarkOnlineResult) => {
    console.log("Result of DeleteWatermarkOnline: ", deleteWatermarkOnlineResult);

    const requestDocument = deleteWatermarkOnlineResult.Document.Values();
    const convertDocument = new model.ConvertDocumentRequest({
        document: requestDocument,
        format: "pdf"
    });

    wordsApi.convertDocument(convertDocument)
    .then((convertDocumentResult) => {
        console.log("Result of ConvertDocument: ", convertDocumentResult);
    });
});