list.js

const Redis = require("ioredis");
const redis = new Redis();

async function main() {
  const numbers = [1, 3, 5, 7, 9];
  await redis.lpush("user-list", numbers);

  const popped = await redis.lpop("user-list");
  console.log(popped); // 9

  const all = await redis.lrange("user-list", 0, -1);
  console.log(all); // [ '7', '5', '3', '1' ]

  const position = await redis.lpos("user-list", 5);
  console.log(position); // 1

  setTimeout(() => {
    // `redis` is in the block mode due to `redis.blpop()`,
    // so we duplicate a new connection to invoke LPUSH command.
    redis.duplicate().lpush("block-list", "hello");
  }, 1200);
  const blockPopped = await redis.blpop("block-list", 0); // Resolved after 1200ms.
  console.log(blockPopped); // [ 'block-list', 'hello' ]
}

main();