Node tips

node.js

#!/usr/bin/node  // shebang

//
// mkdir -p
//
const fs = require('node:fs/promises')

// Creates /tmp/a/apple, regardless of whether `/tmp` and /tmp/a exist.
await fs.mkdir('/tmp/a/apple', { recursive: true }, (err) => {
  if (err) throw err;
});

// ----------------------------------------------------

//
// Is this file running because it was called via CLI?
// (ESM edition)
//
import { resolve } from 'path'
import { fileURLToPath } from 'url'

const pathToThisFile = resolve(fileURLToPath(import.meta.url))
const pathPassedToNode = resolve(process.argv[1])
const isThisFileBeingRunViaCLI = pathToThisFile.includes(pathPassedToNode)

// ----------------------------------------------------

//
// __dirname
//
import path from 'path';
import { fileURLToPath } from 'url';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);