stdin nodejs code example

Example 1: promp node js

const readline = require("readline");

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

rl.question("What is your name ? ", function saveInput(name) {
  console.log(`His name is ${name}`);
  rl.close();
});

rl.on("close", function saveInput() {
    console.log("\nBYE BYE !!!");
    process.exit(0);
});

Example 2: process memory usage javascript

const arr = [1, 2, 3, 4, 5, 6, 9, 7, 8, 9, 10];
arr.reverse();
const used = process.memoryUsage().heapUsed / 1024 / 1024;
console.log(`The script uses approximately ${Math.round(used * 100) / 100} MB`);