How to Run cmd.exe with parameters from JavaScript?

Running cmd.exe with parameters from JavaScript typically involves using Node.js because standard JavaScript running in the browser does not have access to the system's command line for security reasons. With Node.js, you can use the child_process module to execute cmd.exe or any command with parameters.

Approaches to Run cmd.exe with Parameters

• Using Node.js to Run cmd.exe with Parameters
• Passing Parameters Dynamically
• Using Spawn for Advanced Scenarios

Using Node.js to Run cmd.exe with Parameters

• cmd.exe /c: Runs the command specified after /c and then terminates. /c tells cmd.exe to execute the command and exit. Replace echo Hello, PankajBind! with your desired command.
• exec: Runs the command in a shell and captures the output.

Example

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

// Define the command and parameters
const command = 'cmd.exe /c echo Hello, PankajBind!';

// Execute the command
exec(command, (error, stdout, stderr) => {
    if (error) {
        console.error(`Error executing command: ${error.message}`);
        return;
    }

    if (stderr) {
        console.error(`Error output: ${stderr}`);
        return;
    }

    console.log(`Command Output: ${stdout}`);
});

Output

Command Output: Hello, PankajBind!

Passing Parameters Dynamically

You can dynamically construct the command string to include different parameters.

Example

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

// Define dynamic parameters
const username = "PankajBind";
const age = 21;

// Construct the command
const command = `cmd.exe /c echo Name: ${username}, Age: ${age}`;

// Execute the command
exec(command, (error, stdout, stderr) => {
    if (error) {
        console.error(`Error executing command: ${error.message}`);
        return;
    }

    if (stderr) {
        console.error(`Error output: ${stderr}`);
        return;
    }

    console.log(`Command Output: ${stdout}`);
});

Output

Command Output: Name: PankajBind, Age: 21

Using Spawn for Advanced Scenarios

For more control over the process, you can use the spawn function from the child_process module.

Example

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

// Define the command and arguments
const cmd = spawn('cmd.exe', ['/c', 'echo', 'Hello from spawn!']);

// Capture standard output
cmd.stdout.on('data', (data) => {
    console.log(`Output: ${data}`);
});

// Capture standard error
cmd.stderr.on('data', (data) => {
    console.error(`Error: ${data}`);
});

// Handle process close
cmd.on('close', (code) => {
    console.log(`Process exited with code ${code}`);
});

Output

Output: "Hello from spawn!"

Process exited with code 0