dating the jjang from sang doc - Validating email address javascript

The validation constraints can be declared in JSON and shared between clients and the server. One thing that is a bit unorthodox is that most validators will consider undefined values (,) valid values.

validating email address javascript-41

Though for the datetime and date validator to you need to specify a parse and format function and for that you most likely will want to use a library, is highly recommended.

If you want to use async validation you need to use a runtime that supports Promises.

supports async validations through the returns a Promise that is resolved if the validation passes and is rejected if the validation failed, passing the errors as the first argument.

The errors has the same format as the errors from the regular validation function.

One core value of this library is that nothing should be private or inaccessable.

If you want to modify which values are considered empty for example you can simply overwrite You can find some basic examples included in the project.

The project can be found on Git Hub where you can also find our issue tracker.

There is also a Travis project used for testing, a Coveralls project used to code coverage as well as the annotated source.

This differs from example Ruby on Rails where validators instead have the option.

I find it quite common that you want to have constraints on an optional attribute.

You can use the async validate function even if no validations are async, it still returns a promise.

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