node-redis/examples/command-with-modifiers.js

// Define a custom script that shows example of SET command
// with several modifiers.

import { createClient } from 'redis';

const client = createClient();

await client.connect();
await client.del('mykey');

let result = await client.set('mykey', 'myvalue', {
  EX: 60,
  GET: true
});

console.log(result); //null

result = await client.set('mykey', 'newvalue', {
  EX: 60,
  GET: true
});

console.log(result); //myvalue

await client.quit();