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Limitations

Only function-style validators

Although Django supports both class-based and function validators, this package supports only validators written as functions. If supporting class-based validators is important to you, please open an issue.

No i18n

Because the transpiled JavaScript runs in the browser, it doesn't have direct access to the database or filesystem. If you know of a way to get this to work, please open a pull request!

Example

The Django validators documentation gives this as en example ValidationError:

from django.core.exceptions import ValidationError
from django.utils.translation import gettext_lazy as _

def validate_even(value):
    if value % 2 != 0:
        raise ValidationError(
            _('%(value)s is not an even number'),
            params={'value': value},
        )

After removing ugettext_lazy, we get a validator that will work on the front end:

from django.core.exceptions import ValidationError

def validate_even(value):
    if value % 2 != 0:
        raise ValidationError(
            '%(value)s is not an even number',
            params={'value': value},
        )