Read in non-hidden and hidden inputs in a cli

read-inputs-cli.js

const readline = require("readline");

const question = (query) =>
  new Promise((resolve) => {
    const rl = readline.createInterface({
      input: process.stdin,
      output: process.stdout,
    });
    rl.question(`${query}\n`, (value) => {
      rl.close();
      resolve(value);
    });
  });

const hiddenQuestion = (query) =>
  new Promise((resolve) => {
    console.log(query);
    const rl = readline.createInterface({
      input: process.stdin,
      output: process.stdout,
    });
    rl._writeToOutput = () => {};
    const stdin = process.openStdin();
    process.stdin.on("data", (char) => {
      char = char.toString("utf-8");
      switch (char) {
        case "\n":
        case "\r":
        case "\u0004":
          // Finished writing their response
          stdin.pause();
          break;
        // You might make this case optional, (Ctrl-C)
        case "\u0003":
          // Ctrl-C
          process.exit(0);
        default:
          process.stdout.clearLine();
          readline.cursorTo(process.stdout, 0);
          break;
      }
    });
    rl.question("", (value) => {
      rl.history = rl.history.slice(1);
      rl.close();
      resolve(value);
    });
  });

async function main() {
  const username = await question("What is your username?");
  const password = await hiddenQuestion("What is your password?");
  console.log({ username, password });
}

void main();