import * as folderEncrypt from 'folder-encrypt';

folderEncrypt.encrypt({
    password: 'your-password',
    input: 'your-file-or-folder',
    output: 'your-file-or-folder.encrypted' // optional, default will be input path with extension `encrypted`
}).then(() => {
    console.log('encrypted!');
}).catch((err) => {
    console.log(err);
});

import * as folderEncrypt from 'folder-encrypt';
import { Writable } from 'stream';
import * as fs from 'fs';

const outputs = [
    fs.createWriteStream('./output1'),
    fs.createWriteStream('./output2')
], writeStream = new Writable({
    write(chunk, encoding, next) {
        for (let i = outputs.length; i--;)  outputs[i].write(chunk);
        next();
    }
});

folderEncrypt.encrypt({
    password: 'your-password',
    input: 'your-file-or-folder',
    output: writeStream // writable stream
}).then(() => {
    console.log('encrypted!');
}).catch((err) => {
    console.log(err)
});

folderEncrypt.decrypt({
    password: 'your-password',
    input: 'your-file-or-folder.encrypted',
    output: 'your-file-or-folder' // optional, default will be input path without extension
}).then(() => {
    console.log('decrypted!');
    // when using a wrong password on file decryption, the file will be decrypted to a bunch of garbled text. 
    // But still considered `decrypted` due to there is no way knowing the original content.
}).catch((err) => {
    console.log(err); 
    // when using a wrong password on directory decryption, a `tar is corrupted` error will occured.
});