npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

knockout.validation

v2.0.4

Published

A KnockoutJS Plugin for model and property validation

Downloads

38,748

Readme

Knockout Validation

A KnockoutJS Plugin for model and property validation

Build Status Build status Bower version npm version NuGet version

Contributors:

License: MIT

Install

Bower

bower install knockout-validation --save

NuGet

PM> Install-Package Knockout.Validation

NPM

npm install knockout.validation --save

CDN

cdnjs
  • https://cdnjs.cloudflare.com/ajax/libs/knockout-validation/2.0.4/knockout.validation.js
  • https://cdnjs.cloudflare.com/ajax/libs/knockout-validation/2.0.4/knockout.validation.min.js
jsdelivr

Getting Started

//start using it!
var myValue = ko.observable().extend({ required: true });

//oooh complexity
var myComplexValue = ko.observable().extend({
                     required: true,
                     minLength: 3,
                     pattern: {
                          message: 'Hey this doesnt match my pattern',
                          params: '^[A-Z0-9].$'
                     }
                 });

//or chaining if you like that
var myComplexValue = ko.observable()

myComplexValue.extend({ required: true })
            .extend({ minLength: 3 })
            .extend({ pattern: {
                 message: 'Hey this doesnt match my pattern',
                 params: '^[A-Z0-9].$'
            }});

//want to know if all of your ViewModel's properties are valid?
var myViewModel = ko.validatedObservable({
   property1: ko.observable().extend({ required: true }),
   property2: ko.observable().extend({ max: 10 })
});

console.log(myViewModel.isValid()); //false

myViewModel().property1('something');
myViewModel().property2(9);

console.log(myViewModel.isValid()); //true

see more examples on the Fiddle: http://jsfiddle.net/KHFn8/5424/

Native Validation Rules

Required:

var myObj = ko.observable('').extend({ required: true });

Min:

var myObj = ko.observable('').extend({ min: 2 });

Max:

var myObj = ko.observable('').extend({ max: 99 });

MinLength:

var myObj = ko.observable('').extend({ minLength: 3 });

MaxLength:

var myObj = ko.observable('').extend({ maxLength: 12 });

Email:

var myObj = ko.observable('').extend({ email: true });

... and MANY MORE

Much thanks to the jQuery Validation Plug-In team for their work on many of the rules

Custom Validation Rules

Custom Rules

Custom Rules can be created using the simple example below. All you need is to define a validator function and a default message. The validator function takes in the observable's value, and the params that you pass in with the extend method.

ko.validation.rules['mustEqual'] = {
    validator: function (val, params) {
        return val === params;
    },
    message: 'The field must equal {0}'
};
ko.validation.registerExtenders();

//the value '5' is the second arg ('params') that is passed to the validator
var myCustomObj = ko.observable().extend({ mustEqual: 5 });

Learn more about Custom Rules on the WIKI

Or Check out our User-Contributed Custom Rules!

HTML5 Validation Attributes

Required:

<input type="text" data-bind="value: myProp" required />

Min:

<input type="number" data-bind="value: myProp" min="2" />
<input type="week" data-bind="value:myWeek" min="2012-W03" />
<input type="month" data-bind="value:myMonth" min="2012-08" />

Max:

<input type="number" data-bind="value: myProp" max="99" />
<input type="week" data-bind="value:myWeek" max="2010-W15" />
<input type="month" data-bind="value:myMonth" min="2012-08" />

Pattern:

<input type="text" data-bind="value: myProp" pattern="^[a-z0-9].*" />

Step:

<input type="text" data-bind="value: myProp" step="3" />

Special Note, the 'MinLength' attribute was removed until the HTML5 spec fully supports it

Knockout Bindings

ValidationMessage

If you want to customize the display of your objects validation message, use the validationMessage binding:

<div>
   <input type="text" data-bind="value: someValue"/>
   <p data-bind="validationMessage: someValue"></p>
<div>

Check out more on Validation Bindings

Remote Validation Rules

Check out our Async Validation and jQuery AJAX Validation

Localization

Add a reference to the localization js files after the Knockout Validation plugin

<script type="text/javascript" src="knockout.validation.js"></script>
<script type="text/javascript" src="el-GR.js"></script>
<script type="text/javascript" src="fr-FR.js"></script>
<script type="text/javascript" src="de-DE.js"></script>

Apply localized messages

ko.validation.locale('el-GR');