MinIO JavaScript Library for Amazon S3 Compatible Cloud Storage

The MinIO JavaScript Client SDK provides high level APIs to access any Amazon S3 compatible object storage server.

This guide will show you how to install the client SDK and execute an example JavaScript program. For a complete list of APIs and examples, please take a look at the JavaScript Client API Reference documentation.

This document presumes you have a working Node.js development environment, LTS versions v16, v18 or v20.

Download from NPM

npm install --save minio

Download from Source

git clone https://github.com/minio/minio-js
cd minio-js
npm install
npm run build
npm install -g

Using with TypeScript

minio>7.1.0 is shipped with builtin type definition, @types/minio is no longer needed.

Initialize MinIO Client

The following parameters are needed to connect to a MinIO object storage server:

Parameter	Description
endPoint	Hostname of the object storage service.
port	TCP/IP port number. Optional, defaults to 80 for HTTP and 443 for HTTPs.
accessKey	Access key (user ID) of an account in the S3 service.
secretKey	Secret key (password) of an account in the S3 service.
useSSL	Optional, set to 'true' to enable secure (HTTPS) access.

import * as Minio from 'minio'

const minioClient = new Minio.Client({
  endPoint: 'play.min.io',
  port: 9000,
  useSSL: true,
  accessKey: 'Q3AM3UQ867SPQQA43P2F',
  secretKey: 'zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG',
})

Quick Start Example - File Uploader

This example connects to an object storage server, creates a bucket, and uploads a file to the bucket. It uses the MinIO play server, a public MinIO cluster located at https://play.min.io.

The play server runs the latest stable version of MinIO and may be used for testing and development. The access credentials shown in this example are open to the public. All data uploaded to play should be considered public and non-protected.

file-uploader.mjs

import * as Minio from 'minio'

// Instantiate the MinIO client with the object store service
// endpoint and an authorized user's credentials
// play.min.io is the MinIO public test cluster
const minioClient = new Minio.Client({
  endPoint: 'play.min.io',
  port: 9000,
  useSSL: true,
  accessKey: 'Q3AM3UQ867SPQQA43P2F',
  secretKey: 'zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG',
})

// File to upload
const sourceFile = '/tmp/test-file.txt'

// Destination bucket
const bucket = 'js-test-bucket'

// Destination object name
const destinationObject = 'my-test-file.txt'

// Check if the bucket exists
// If it doesn't, create it
const exists = await minioClient.bucketExists(bucket)
if (exists) {
  console.log('Bucket ' + bucket + ' exists.')
} else {
  await minioClient.makeBucket(bucket, 'us-east-1')
  console.log('Bucket ' + bucket + ' created in "us-east-1".')
}

// Set the object metadata
var metaData = {
  'Content-Type': 'text/plain',
  'X-Amz-Meta-Testing': 1234,
  example: 5678,
}

// Upload the file with fPutObject
// If an object with the same name exists,
// it is updated with new data
await minioClient.fPutObject(bucket, destinationObject, sourceFile, metaData)
console.log('File ' + sourceFile + ' uploaded as object ' + destinationObject + ' in bucket ' + bucket)

Run the File Uploader

node file-uploader.mjs
Bucket js-test-bucket created successfully in "us-east-1".
File /tmp/test-file.txt uploaded successfully as my-test-file.txt to bucket js-test-bucket

Verify the object was created with mc:

mc ls play/js-test-bucket
[2023-11-10 17:52:20 UTC]  20KiB STANDARD my-test-file.txt

API Reference

The complete API Reference is available here:

• MinIO JavaScript API Reference

Bucket Operations

• makeBucket
• listBuckets
• bucketExists
• removeBucket
• listObjects
• listObjectsV2
• listObjectsV2WithMetadata (Extension)
• listIncompleteUploads
• getBucketVersioning
• setBucketVersioning
• setBucketLifecycle
• getBucketLifecycle
• removeBucketLifecycle
• getObjectLockConfig
• setObjectLockConfig

File Object Operations

• fPutObject
• fGetObject

Object Operations

• getObject
• putObject
• copyObject
• statObject
• removeObject
• removeObjects
• removeIncompleteUpload
• selectObjectContent

Presigned Operations

• presignedGetObject
• presignedPutObject
• presignedPostPolicy

Bucket Notification Operations

• getBucketNotification
• setBucketNotification
• removeAllBucketNotification
• listenBucketNotification (MinIO Extension)

Bucket Policy Operations

• getBucketPolicy
• setBucketPolicy

Examples

Bucket Operations

• list-buckets.mjs
• list-objects.js
• list-objects-v2.js
• list-objects-v2-with-metadata.js (Extension)
• bucket-exists.mjs
• make-bucket.mjs
• remove-bucket.mjs
• list-incomplete-uploads.js
• get-bucket-versioning.mjs
• set-bucket-versioning.mjs
• set-bucket-tagging.mjs
• get-bucket-versioning.mjs
• set-bucket-versioning.mjs
• set-bucket-tagging.mjs
• get-bucket-tagging.mjs
• remove-bucket-tagging.mjs
• set-bucket-lifecycle.mjs
• get-bucket-lifecycle.mjs
• remove-bucket-lifecycle.mjs
• get-object-lock-config.mjs
• set-object-lock-config.mjs
• set-bucket-replication.mjs
• get-bucket-replication.mjs
• remove-bucket-replication.mjs
• set-bucket-encryption.mjs
• get-bucket-encryption.mjs
• remove-bucket-encryption.mjs

File Object Operations

• fput-object.js
• fget-object.mjs

Object Operations

• put-object.js
• get-object.mjs
• copy-object.js
• get-partialobject.mjs
• remove-object.js
• remove-incomplete-upload.js
• stat-object.mjs
• get-object-retention.mjs
• put-object-retention.mjs
• put-object-tagging.mjs
• get-object-tagging.mjs
• remove-object-tagging.mjs
• set-object-legal-hold.mjs
• get-object-legal-hold.mjs
• compose-object.js
• select-object-content.mjs

Presigned Operations

• presigned-getobject.js
• presigned-putobject.js
• presigned-postpolicy.js

Bucket Notification Operations

• get-bucket-notification.js
• set-bucket-notification.js
• remove-all-bucket-notification.js
• listen-bucket-notification.js (MinIO Extension)

Bucket Policy Operations

• get-bucket-policy.js
• set-bucket-policy.mjs

Custom Settings

• setAccelerateEndPoint

Explore Further

• Complete Documentation
• MinIO JavaScript Client SDK API Reference

Contribute

• Contributors Guide