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Node.js _dirname & path All In One

file path
相对路径
绝对路径

_dirname

https://nodejs.org/docs/latest/api/globals.html#globals_dirname

https://nodejs.org/docs/latest/api/modules.html#modules_dirname

const log = console.log;

// log(`__dirname`, __dirname);

This is the same as the path.dirname() of the __filename.

Example: running node example.js from /Users/mjr

console.log(__dirname);
// Prints: /Users/mjr

console.log(path.dirname(__filename));
// Prints: /Users/mjr

__filename

Running node example.js from /Users/mjr

console.log(__filename);
// Prints: /Users/mjr/example.js

console.log(__dirname);
// Prints: /Users/mjr

path

https://nodejs.org/api/path.html

https://github.com/nodejs/node/blob/v15.2.0/lib/path.js

const log = console.log;

const path = require('path');

// path.dirname(file_path);

let directories = path.dirname('/Users/xgqfrms/app.js');

log(directories);
// /Users/xgqfrms

1. Express.js / Koa.js

2. React SSR

3. Vue SSR

4. Electron app

"use strict";

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 * @created 2020-11-01
 * @modified
 *
 * @description
 * @difficulty Easy Medium Hard
 * @complexity O(n)
 * @augments
 * @example
 * @link
 * @solutions
 *
 * @best_solutions
 *
 */

const log = console.log;

const path = require('path');
// path.dirname(file_path);

// log(`__dirname`, __dirname);

const { app, BrowserWindow } = require('electron')

function createWindow () {
  const win = new BrowserWindow({
     1000,
    height: 700,
    webPreferences: {
      nodeIntegration: true
    }
  })

  // win.loadFile('index.html');
  // win.loadFile(__dirname + '/index.html');
  // relative path 拼接 ✅
  // win.loadFile(__dirname.replace(`src`, ``) + '/public/index.html');
  let directories = path.dirname('index.js');
  log(`directories =`, directories);
  // directories = ., . 即指项目的 root path ✅
  // win.loadFile(directories.replace(`src`, ``) + '/public/index.html');
  win.loadFile('./public/index.html');
  // 打开 debug 模式
  win.webContents.openDevTools();
}

app.whenReady().then(createWindow)

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

app.on('activate', () => {
  if (BrowserWindow.getAllWindows().length === 0) {
    createWindow()
  }
})

refs

https://stackoverflow.com/questions/8131344/what-is-the-difference-between-dirname-and-in-node-js

difference between __dirname and ./ in Node.js

https://www.geeksforgeeks.org/difference-between-__dirname-and-in-node-js/

https://www.w3schools.com/nodejs/met_path_dirname.asp

process.cwd()

https://coderrocketfuel.com/article/get-the-path-of-the-current-working-directory-in-node-js

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