Question

// My function does X and Y.
// @params {object} parameters An object containing the parameters
// @params {function} callback The callback function
function(parameters, callback) {
}

But how do I describe how the parameters object should be structured? For example it should be something like:

{
  setting1 : 123, // (required, integer)
  setting2 : 'asdf' // (optional, string)
}

Answer 1

From the @param wiki page:

---

Parameters With Properties

If a parameter is expected to have a particular property, you can document that immediately after the @param tag for that parameter, like so:

 /**
  * @param userInfo Information about the user.
  * @param userInfo.name The name of the user.
  * @param userInfo.email The email of the user.
  */
 function logIn(userInfo) {
        doLogIn(userInfo.name, userInfo.email);
 }

---

There used to be a @config tag which immediately followed the corresponding @param, but it appears to have been deprecated (example here).