Is it better to not require validator method starting with `is`?

[mocheng]

In my team, this has already happened twice. Developer name extended validator as checkChinesePhoneNumber and it doesn't work.

It costs half an hour to figure out that all validator methods must start with is, as below code states.

https://github.com/samora/validr/blob/master/lib/validr.js#L27-L30

    // Verify valid validator method.
    var notValidator = (method.slice(0, 2) !== 'is'
      && method !== 'equals'
      && method !== 'contains'
      && method !== 'matches');

To save more time for validr users, would it better to drop this limitation?

[samora]

I agree, it will be better to drop that limitation.

Although the readme highlights this point in the extending Valir section.

This limitation is there mainly because of the names of validator's methods which validr uses internally.