Simplest CLI based node.js app with in-built argument parser without any dependencies

app-cli.js

const flags = { _: [] };
process.argv.forEach((s, e) => {
  if (e >= 2)
    if (/^[\-\-]{1,2}.+[\=\:].*$/.test(s)) {
      let e = s.split(/[\=\:]/),
        l = e[0].lastIndexOf("-");
      l < 2 && (flags[e[0].substring(l + 1)] = e[1]);
    } else if (/^[\-\-]{1,2}.+$/.test(s)) {
      let e = s.lastIndexOf("-");
      e < 2 && (flags[s.substring(e + 1)] = !0);
    } else flags._.push(s);
});

if (flags.h || flags.help) {
  console.log(`
Options:
 -h --help         display help menu
 -v --version      show app version
 -n --name=NAME    provide your name 
 
Usages:
 $ node index.js (-h|--help)
 $ node index.js (-v|--version)
 $ node index.js (-n=AK|--name="Abhishek Kumar")

Examples:
 $ node index.js --help
 $ node index.js --name="Abhishek Kumar"
    `);
} else if (flags.v || flags.version) {
  console.log(`App CLI   version 1.0.0`);
} else {
  // Your application logic
  console.log(`Hello, ${flags.n || flags.name}!`);
}