so jar files are just java archive files that can be unzipped with any commonly available operating system tool like unzip or jar, so a simple command like jar xvf /path/to/file.jar or unzip /path/to/file.jar should extract any .jar file. But since you want to use nodeJS to do it, you can make use of the exec function present in the node js code module called child_process.

you can create a simple function which takes in the path to the jar file like

const exec = require('child_process').exec;

extractJar(path) => {
  const command = `jar xvf ${path}`;
  exec(command, (err, stdout) => {
    if(err) console.log(err); return;
    console.log('success!');
  })
}

alternatively, you try by using libraries like unzipper, these do not depend upon your operating system tools as the exec command just executes the process on your shell, but these libraries use your node js IO operations for extracting.