Upload in memory data direct to S3

main.ts

import { randomUUID } from "crypto";
import { S3Client } from "@aws-sdk/client-s3";
import { Upload } from "@aws-sdk/lib-storage";
import { PassThrough } from "stream";

const s3Client = new S3Client({});

(async () => {
    const passThrough = new PassThrough();
    for (const person of ["person-1", "person-2", "person-3"]) {
        const example = { Item: {} } as { Item: { id: { S: string }, person: { S: string } } }
        example.Item.id = { S: randomUUID() }
        example.Item.person = { S: person }
        passThrough.write(`${JSON.stringify(example)}\n`);
    }

    passThrough.end();

    try {
        const result = await new Upload({
            client: s3Client,
            params: {
                Bucket: "<bucket-name>",
                Key: "test.json",
                Body: passThrough
            }
        }).done()

        console.log(result)
    } catch (err) {
        console.error(err);
    }
})()