uploads.js

const { VK } = require('vk-io');
const fetch = require('node-fetch');

const fs = require('fs');

const vk = new VK({
    token: process.env.TOKEN
});

/**
 * Sets custom uploadUrl or timeout
 */
vk.upload.photoAlbum({
    source: {
        // uploadUrl: '<custom upload url>',
        // timeout: 60e3,
        values: [
            // Examples of parameters below
            {
                value: '<value>'
            }
        ]
    }
});

/**
 * Uploads photo for wall
 *
 * Auto filename and contentType
 */
Promise.all([
    /* File path */
    vk.upload.wallPhoto({
        source: {
            value: './path/to/cat1.jpg'
        }
    }),

    /* File stream */
    vk.upload.wallPhoto({
        source: {
            value: fs.createReadStream('./path/to/cat2.jpg')
        }
    }),

    /* Buffer */
    vk.upload.wallPhoto({
        source: {
            value: fs.readFileSync('./path/to/cat3.jpg')
        }
    }),

    /* URL */
    vk.upload.wallPhoto({
        source: {
            value: 'http://lorempixel.com/400/200/cats/'
        }
    }),

    /* URL Buffer */
    fetch('http://lorempixel.com/400/200/cats/')
        .then(response => response.buffer())
        .then(buffer => (
            vk.upload.wallPhoto({
                source: {
                    value: buffer
                }
            })
        )),

    /* URL Stream */
    fetch('http://lorempixel.com/400/200/cats/')
        .then(response => (
            vk.upload.wallPhoto({
                source: {
                    value: response.body,
                    contentLength: response.headers.get('content-length')
                }
            })
        ))
]);

/**
 * Uploads photo for wall with contentType and filename
 */
Promise.all([
    /* File path */
    vk.upload.wallPhoto({
        // jpeg at dat file
        source: {
            values: {
                value: './path/to/cat1.dat',
                contentType: 'image/jpeg',
                filename: 'cat1.jpg'
            }
        }
    }),

    /* File stream */
    vk.upload.wallPhoto({
        // png at file without extensions
        source: {
            values: {
                value: fs.createReadStream('./path/to/cat2'),
                contentType: 'image/png',
                filename: 'cat2.png'
            }
        }
    })

    // ...etc
]);

/**
 * Uploads multiple files (current only photoAlbum)
 */
vk.upload.photoAlbum({
    source: {
        timeout: 1e3 * 60,
        values: [
            {
                value: './path/to/cat1.jpg'
            },

            {
                value: 'http://lorempixel.com/400/200/cats/'
            },

            {
                value: fs.createReadStream('./path/to/cat2.jpg')
            },

            {
                value: fs.createReadStream('./path/to/cat2.jpg'),
                filename: 'cat2.jpg'
            },

            {
                value: './path/to/cat5.dat',
                contentType: 'image/jpeg',
                filename: 'cat5.jpg'
            }
        ]
    }
});