url.fileURLToPath(url[, options])

• url <URL> | <string> 要转换为路径的文件 URL 字符串或 URL 对象。
• options <Object>
  • windows <boolean> | <undefined> 如果 path 应该作为 Windows 文件路径返回则为 true，作为 POSIX 路径返回则为 false，系统默认则为 undefined。默认值： undefined。
• 返回：<string> 完全解析的特定平台的 Node.js 文件路径。

此函数确保对百分号编码字符的正确解码，同时确保生成跨平台有效的绝对路径字符串。

【This function ensures the correct decodings of percent-encoded characters as well as ensuring a cross-platform valid absolute path string.】

import { fileURLToPath } from 'node:url';

const __filename = fileURLToPath(import.meta.url);

new URL('file:///C:/path/').pathname;      // Incorrect: /C:/path/
fileURLToPath('file:///C:/path/');         // Correct:   C:\path\ (Windows)

new URL('file://nas/foo.txt').pathname;    // Incorrect: /foo.txt
fileURLToPath('file://nas/foo.txt');       // Correct:   \\nas\foo.txt (Windows)

new URL('file:///你好.txt').pathname;      // Incorrect: /%E4%BD%A0%E5%A5%BD.txt
fileURLToPath('file:///你好.txt');         // Correct:   /你好.txt (POSIX)

new URL('file:///hello world').pathname;   // Incorrect: /hello%20world
fileURLToPath('file:///hello world');      // Correct:   /hello world (POSIX)const { fileURLToPath } = require('node:url');
new URL('file:///C:/path/').pathname;      // Incorrect: /C:/path/
fileURLToPath('file:///C:/path/');         // Correct:   C:\path\ (Windows)

new URL('file://nas/foo.txt').pathname;    // Incorrect: /foo.txt
fileURLToPath('file://nas/foo.txt');       // Correct:   \\nas\foo.txt (Windows)

new URL('file:///你好.txt').pathname;      // Incorrect: /%E4%BD%A0%E5%A5%BD.txt
fileURLToPath('file:///你好.txt');         // Correct:   /你好.txt (POSIX)

new URL('file:///hello world').pathname;   // Incorrect: /hello%20world
fileURLToPath('file:///hello world');      // Correct:   /hello world (POSIX)拷贝