Описание тега knockout-validation
A plugin for knockout.js for declarative, rule-based validation of models and properties.
Knockout Validation allows for validation of knockout.js view model observables through extenders with:
The plugin also supports Asynchronous Validation.
Examples of such extensions include:
var myValue = ko.observable().extend({ required: true });
var myValue = ko.observable().extend({ max: 10 });