How to jump directory in nodejs

In Node.js, there are many ways to jump to the directory. Several common methods will be introduced below.

1. Use process.chdir()

In Node.js, you can use the process.chdir() method to jump to the directory. The purpose of this method is to modify the current working directory of the Node.js process.

Sample code:

process.chdir('/Users/username/Documents/');

The above example code switches the current working directory to the /Users/username/Documents/ directory.

It should be noted that when using the process.chdir() method to jump to a directory, you must pass in the absolute path of the directory to be switched to.

2. Use __dirname

In Node.js, the __dirname variable represents the absolute path of the directory where the current module is located. Directory jump can be achieved by concatenating __dirname and the target directory name.

Sample code:

const path = require('path');
const targetDir = path.join(__dirname, 'myFolder');
process.chdir(targetDir);

The above example code switches the current working directory to the myFolder directory in the directory where the current module is located.

It should be noted that when using the __dirname variable to splice the target directory name, the path.join() method must be used to ensure the correctness of the spliced ​​path.

3. Use process.env.PWD and process.chdir()

In Node.js, the process.env.PWD variable represents the absolute path of the current working directory. Directory jump can be achieved by modifying the value of this variable.

Sample code:

process.env.PWD = '/Users/username/Documents/';
process.chdir(process.env.PWD);

The above example code switches the current working directory to the /Users/username/Documents/ directory. It should be noted that when using this method to jump to a directory, you need to modify the value of the process.env.PWD variable first, and then use the process.chdir() method to jump to the directory.

4. Use the cd command line

In Node.js, you can use the exec() method in the child_process module to perform command line operations to achieve directory jump.

Sample code:

const { exec } = require('child_process');

const cmd = 'cd /Users/username/Documents/ && pwd'; // 执行 cd 命令跳转目录
exec(cmd, (err, stdout, stderr) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(stdout); // 打印执行命令后的当前工作目录
});

The above example code switches the current working directory to the /Users/username/Documents/ directory. It should be noted that when using this method to jump to a directory, you need to first execute the cd command to jump to the directory, and then execute the pwd command to obtain the absolute path of the current working directory.

In general, the above methods can all implement the directory jump operation in Node.js. When using it, you need to choose the appropriate method according to the situation.

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