Validating form field

22-Aug-2016 00:03 by 6 Comments

Validating form field

To learn how to craft your custom remote validators, go here.In computer science, data validation is the process of ensuring that data have undergone data cleansing to ensure they have data quality, that is, that they are both correct and useful.

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Validating functions should return either otherwise. It can instead return a j Query promise that will be resolved if the value is valid, or be rejected otherwise.Current available plugins are in Extras for additional validators.Parsley is a decoupled library that uses different classes to do the heavy work.Parsley uses a specific DOM API which allows you to configure pretty much everything directly from your DOM, without writing a single javascript configuration line or custom function.Parsley's default DOM API is Parsley adds many classes and elements in the DOM when it validates.You have to manage these errors completely manually and they should be independant with other validations. Note that Parsley triggers events that allows Parsley UI to work.

Further more, it could allow you to do some powerful magic if you listen properly to the right events!

Validators can reject with a custom error message as a first argument if desired.

You can specify what kind of requirement parameter your custom validator is expecting: as second and third arguments (the first one being the value(s) to validate).

It helps you provide your users with feedback on their form submission before sending it to your server.

It saves you bandwidth, server load and it saves time for your users.

The format used must be that [of the standard](https://whatwg.org/multipage/infrastructure.html#valid-date-string), e.g. Your custom validator must specify at least one of these.

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