如何在node.js的REPL中獲得模塊功能的幫助？

Question

我正在嘗試使用REPL獲得一些屬於Node.js中模塊功能的文檔手冊頁面。

Console.dir（modObj）列出了屬於模塊的所有方法和屬性。 此外，我無法找到任何手冊或針對該功能的幫助，這些手冊或手冊無法演示該功能的示例和用法。

在Python Interactive Shell中，這非常簡單，如下所示。 瀏覽模塊的官方在線文檔是一種替代方法。 REPL是否對所有模塊的手冊頁都具有內置支持？

在Python Interactive Shell中：

import os
dir (os)
['EX_CANTCREAT', 'EX_CONFIG', 'EX_DATAERR', 'EX_IOERR', 'EX_NOHOST', 'EX_NOINPUT', 'EX_NOPERM', 'EX_NOUSER', 'EX_OK', 'EX_OSERR', 'EX_OSFILE', 'EX_PROTOCOL', 'urandom', 'utime', 'wait', 'wait3', 'wait4', 'waitpid', 'walk', 'write']
help(os.walk)
Help on function walk in module os:

walk(top, topdown=True, onerror=None, followlinks=False)
    Directory tree generator.

    For each directory in the directory tree rooted at top (including top
    itself, but excluding '.' and '..'), yields a 3-tuple

        dirpath, dirnames, filenames

    dirpath is a string, the path to the directory.  dirnames is a list of
    the names of the subdirectories in dirpath (excluding '.' and '..').
    filenames is a list of the names of the non-directory files in dirpath.
    Note that the names in the lists are just names, with no path components.
    To get a full path (which begins with top) to a file or directory in
    dirpath, do os.path.join(dirpath,name).

在Node的REPL中：

> var fs=require('fs')
undefined
> console.dir(fs)
{ Stats: [Function],
  F_OK: 0,
  R_OK: 4,
  W_OK: 2,
  X_OK: 1,
  access: [Function],
  accessSync: [Function],
  exists: [Function],
  existsSync: [Function],
  readFile: [Function],
  readFileSync: [Function],
  close: [Function],
  closeSync: [Function],
  open: [Function],
  openSync: [Function],
  read: [Function],
  readSync: [Function],
  write: [Function],
  writeSync: [Function],
  rename: [Function],
  renameSync: [Function],
  truncate: [Function],
  truncateSync: [Function],
  ftruncate: [Function],
  ftruncateSync: [Function],
  rmdir: [Function],
  rmdirSync: [Function],
  fdatasync: [Function],
  fdatasyncSync: [Function],
  fsync: [Function],
  fsyncSync: [Function],
  mkdir: [Function],
  mkdirSync: [Function],
  readdir: [Function],
  readdirSync: [Function],
  fstat: [Function],
  lstat: [Function],
  stat: [Function],
  fstatSync: [Function],
  lstatSync: [Function],
  statSync: [Function],
  readlink: [Function],
  readlinkSync: [Function],
  symlink: [Function],
  symlinkSync: [Function],
  link: [Function],
  linkSync: [Function],
  unlink: [Function],
  unlinkSync: [Function],
  fchmod: [Function],
  fchmodSync: [Function],
  chmod: [Function],
  chmodSync: [Function],
  fchown: [Function],
  fchownSync: [Function],
  chown: [Function],
  chownSync: [Function],
  _toUnixTimestamp: [Function: toUnixTimestamp],
  utimes: [Function],
  utimesSync: [Function],
  futimes: [Function],
  futimesSync: [Function],
  writeFile: [Function],
  writeFileSync: [Function],
  appendFile: [Function],
  appendFileSync: [Function],
  watch: [Function],
  watchFile: [Function],
  unwatchFile: [Function],
  realpathSync: [Function: realpathSync],
  realpath: [Function: realpath],
  createReadStream: [Function],
  ReadStream:
   { [Function: ReadStream]
     super_:
      { [Function: Readable]
        ReadableState: [Function: ReadableState],
        super_: [Object],
        _fromList: [Function: fromList] } },
  FileReadStream:
   { [Function: ReadStream]
     super_:
      { [Function: Readable]
        ReadableState: [Function: ReadableState],
        super_: [Object],
        _fromList: [Function: fromList] } },
  createWriteStream: [Function],
  WriteStream:
   { [Function: WriteStream]
     super_: { [Function: Writable] WritableState: [Function: WritableState], super_: [Object] } },
  FileWriteStream:
   { [Function: WriteStream]
     super_: { [Function: Writable] WritableState: [Function: WritableState], super_: [Object] } } }
undefined
>
> help(fs.stat)
ReferenceError: help is not defined
    at repl:1:1
    at REPLServer.defaultEval (repl.js:252:27)
    at bound (domain.js:287:14)
    at REPLServer.runBound [as eval] (domain.js:300:12)
    at REPLServer.<anonymous> (repl.js:417:12)
    at emitOne (events.js:82:20)
    at REPLServer.emit (events.js:169:7)
    at REPLServer.Interface._onLine (readline.js:210:10)
    at REPLServer.Interface._line (readline.js:549:8)
    at REPLServer.Interface._ttyWrite (readline.js:826:14)

Answer 1

我認為到目前為止，node還沒有提供REPL中的文檔。 在節點的官方倉庫中，有同樣的問題打開了，您可以在這里查看

npm中有一個工具可以滿足您的需求節點幫助

但是，如果您對僅使文檔脫機感到滿意，那么我可以推薦一些工具。

• DevDocs-可用於將各種語言的文檔直接保存到瀏覽器中。
• ZealDocs-如果您不習慣每次都打開瀏覽器，則此實用程序可以為您提供幫助。