Working with Readline Interface

import readline from "node:readline/promises";
const rl = readline.createInterface({ input: process.stdin, output: process.stdout });
const name = await rl.question("Name? ");
console.log(`Hi ${name}`);
rl.close();

import { createReadStream } from "node:fs";
import { createInterface } from "node:readline";
const rl = createInterface({ input: createReadStream("big.log"), crlfDelay: Infinity });
for await (const line of rl) console.log(line);

rl.on("SIGINT", async () => {
  const answer = await rl.question("Quit? (y/n) ");
  if (answer.toLowerCase() === "y") process.exit(0);
});

rl.setPrompt("app> ");
rl.prompt();
rl.on("line", (line) => {
  if (line === "exit") return rl.close();
  console.log(`echo: ${line}`);
  rl.prompt();
}).on("close", () => process.exit(0));

function completer(line) {
  const cmds = ["help", "list", "load", "save", "exit"];
  const hits = cmds.filter((c) => c.startsWith(line));
  return [hits.length ? hits : cmds, line];
}
const rl = readline.createInterface({ input: process.stdin, output: process.stdout, completer });