This package allows you to use custom error messages for checks by adding a third argument to check:

check(value, pattern[, message]);

If message is not provided, check functions similarly to how it would without this package.

If message is provided, however, it will replace the original error message from the check. With this you can add meaningful error messages to checks instead of seeing something like: 'Match error: Expected string, got number'.

Note that the check in this package throws Match.Error exactly as the original check in meteor/check and these errors do not get propagated to the client side like Meteor.Error does. If you'd like to send error messages to the client from Meteor methods, you could do something like the following:

Meteor.methods({
  someMethod (popularity, domain) {
    // Expose errors in this section to client.
    try {
      check(popularity, Number, 'Invalid popularity. Expecting a number.');
      check(domain, RegEx_validDomain, 'Invalid domain.');

      // Any more checks to perform.
    } catch (err) {
      throw new Meteor.Error('Invalid Input', err.message);
    }

    // Do other stuff and throw errors that are hidden from client.
  }
});

Install

meteor add zodiase:check

// For Meteor versions that support export/import, this package has to be imported to take effect.
import { check } from 'meteor/zodiase:check';