Learning Node.js Development

Calling the .help command

Now before we get into the options object, let's add one more call right after command. We're going to call .help, which is a method, so we're going to call it as a function, and we don't need to pass in any arguments:

const argv = yargs  .command('add', 'Add a new note', {  })  .help()  .argv;

When we add on this help call, it sets up yargs to return some really useful information when someone runs the program. For example, I can run the node app.js command with the help flag. The help flag is added because we called that help method, and when I run the program, you can see all of the options we have available:

node app.js --help

As shown in the preceding output, we have one command, add Add a new note, and a help ...