Node.js 中的 process.chdir() 方法


process.chdir() 方法用于更改 Node.js 进程的当前目录。如果发生任何错误或进程失败,它将抛出异常,但不会在成功时返回任何响应。例如:当指定的目录不存在时,它可能会失败。

语法

process.chdir(directory)

参数

  • directory – 这将包含该目录的名称,该目录将更新为之前的目录名称。

示例

创建一个名为 – chdir.js 的文件并将以下代码片段复制到其中。创建文件后,使用以下命令运行此代码,如下例所示 &Minus;

node chdir.js

chdir.js

 实时演示

// Node.js program to demonstrate the use of process.chdir()

// Importing the process module
const process = require('process');

// Printing present working Directory
console.log("Present working directory: " + process.cwd());

try {
   // Updating with the New directory
   process.chdir('../tutorialspoint');
   console.log("Updated working directory is: " + process.cwd());
} catch (err) {
      // Printing error if any occurs
      console.error("error occured while " + "changing directory: " + err);
}

输出

C:\home
ode>> node chdir.js Present working directory: /home/mayankaggarwal/mysql-test Updated working directory is: /home/mayankaggarwal/tutorialspoint

示例

让我们再看一个例子。

 实时演示

// Node.js program to demonstrate the use of process.argv

// Importing the process module
const process = require('process');

try {
   // Changing the directory with below namey
   process.chdir('../not/tutorialspoint');
   console.log("New Directory has been succesfully updated");
} catch (err) {
   // Printing error if occurs
   console.error("Error while changing directory", err);
}

输出

C:\home
ode>> node chdir.js Error while changing directory { Error: ENOENT: no such file or directory, chdir '../not/tutorialspoint'       at process.chdir (internal/process/main_thread_only.js:31:12)       at Object.<anonymous> (/home/mayankaggarwal/mysql-test/process.js:9:9)       at Module._compile (internal/modules/cjs/loader.js:778:30)       at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)       at Module.load (internal/modules/cjs/loader.js:653:32)       at tryModuleLoad (internal/modules/cjs/loader.js:593:12)       at Function.Module._load (internal/modules/cjs/loader.js:585:3)       at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)       at startup (internal/bootstrap/node.js:283:19)       at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)    errno: -2,    code: 'ENOENT',    syscall: 'chdir',    path: '../not/tutorialspoint' }

更新于: 20-05-2021

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