类型错误：opendirSync 不是函数

Posted 2023-03-08

【中文标题】类型错误：opendirSync 不是函数

【英文标题】：TypeError: opendirSync is not a function

【发布时间】：2020-05-31 12:03:42

【问题描述】：

我正在编写一个电子应用程序，我想使用 fs 模块的 opendirSync 函数来计算目录中的文件数。但是，我收到以下错误：

(node:12944) UnhandledPromiseRejectionWarning: TypeError: fs.opendirSync is not a function
    at DataImporter.CountFiles (C:\Users\v\Documents\Projects\Electron\asts\server\data_importer.js:18:8)
    at new DataImporter (C:\Users\v\Documents\Projects\Electron\asts\server\data_importer.js:5:26)
    at C:\Users\v\Documents\Projects\Electron\asts\main.js:32:19
(node:12944) UnhandledPromiseRejectionWarning: TypeError: fs.opendir is not a function
    at DataImporter.CountFiles (C:\Users\v\Documents\Projects\Electron\asts\server\data_importer.js:18:8)
    at new DataImporter (C:\Users\v\Documents\Projects\Electron\asts\server\data_importer.js:5:26)
    at C:\Users\v\Documents\Projects\Electron\asts\main.js:32:19
(node:12944) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:12944) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:12944) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:12944) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

我使用的代码如下：

let fs = require('fs');
let path_mod = require('path');

function CountFiles(path) 
    let dir_end = null;
    let count = 0;
    let directory = fs.opendirSync(path);
    while(1) 
      let ret = directory.readSync();
      if(!ret) 
        break;
       else if(ret.isDirectory()) 
        console.log(path_mod.join(path, ret.name));        
        count += CountFiles(path_mod.join(path, ret.name));
       else 
        count++;
      
    
    directory.closeSync();
    return count;
  

节点版本：12.6.0

电子版：7.1.12

我无法理解导致此错误的原因以及如何修复它。我知道路径是正确的并且我可以访问目标目录（因为我还使用 fs 模块从该目录读取文件）。

感谢您的帮助。

【参考方案1】：

在节点版本：v12.12.0中添加了opendirSync方法，您必须升级节点版本。

历史：

Version Changes
v13.1.0  The bufferSize option was introduced.

v12.12.0 Added in: v12.12.0 

你可以阅读更多关于这个here

【讨论】：

呃，由于编辑器的自动完成，我没有想到这一点。非常感谢，这解决了我的错误。