javascript run command

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

const output = execSync('ls', { encoding: 'utf-8' });

console.log('The output is:');
console.log(output);

<form action="">
  <select name="channel">
   <option value="#channel1">channel1</option>
   <option value="#channel2">channel2</option>
  </select>
 </form>