access aws s3 using js sdk v3

aws_s3_access.js

import { 
    S3Client,
    PutObjectCommand,
    GetObjectAttributesCommand,
    GetObjectCommand,
    DeleteObjectCommand,
    ListObjectsV2Command,
} from "@aws-sdk/client-s3";

import {
  getSignedUrl,
} from "@aws-sdk/s3-request-presigner";


const s3 = new S3Client({ region: "us-east-1" });
const BKT = "my-test-bkt";
const KEY = "f/hello.txt";


export const handler = async(event) => {

    const put = new PutObjectCommand({
        Bucket: BKT,
        Key: KEY,
        Body: "Hello world",
    });
    console.log(await s3.send(put));
    
    
    const getAttrs = new GetObjectAttributesCommand({
        Bucket: BKT,
        Key: KEY,
        ObjectAttributes: ["ETag", "ObjectSize"],
    });
    console.log(await s3.send(getAttrs));
    
    
    const getCmd = new GetObjectCommand({ Bucket: BKT, Key: KEY1 });
    const getResp = await s3.send(getCmd);
    const data = await getResp.Body.transformToString();
    console.log(data);
    const signedUrl = await getSignedUrl(s3, getCmd, { expiresIn: 60 });
    console.log(signedUrl);    

    const delCmd = new DeleteObjectCommand({
        Bucket: BKT,
        Key: KEY,
    });
    console.log(await s3.send(delCmd));  
    
    const listCmd = new ListObjectsV2Command({
        Bucket: BKT,
        Prefix: "f/",
        StartAfter: "f/",
        MaxKeys: 3,
    });
    console.log(await s3.send(listCmd));

};

s3_obj_rw_policy.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "VisualEditor0",
            "Effect": "Allow",
            "Action": "s3:ListBucket",
            "Resource": "arn:aws:s3:::*"
        },
        {
            "Sid": "VisualEditor1",
            "Effect": "Allow",
            "Action": [
                "s3:PutObject",
                "s3:GetObject",
                "s3:GetObjectAttributes",
                "s3:DeleteObject"
            ],
            "Resource": "arn:aws:s3:::*/*"
        }
    ]
}