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version](https://badge.fury.io/bo/knockout-validation.svg)](http://badge.fury.io/bo/knockout-validation)\r\n[![npm version](https://badge.fury.io/js/knockout.validation.svg)](http://badge.fury.io/js/knockout.validation)\r\n[![NuGet version](https://badge.fury.io/nu/Knockout.Validation.svg)](http://badge.fury.io/nu/Knockout.Validation)\r\n\r\nContributors:\r\n\r\n* [Eric Barnard](https://github.com/ericmbarnard)\r\n* [Steve Greatrex](https://github.com/stevegreatrex)\r\n* [Cristian Trifan](https://github.com/crissdev)\r\n* [Andy Booth](https://github.com/andybooth)\r\n* [Michal Poreba](https://github.com/michalporeba)\r\n* and many others!\r\n\r\nLicense: [MIT](http://www.opensource.org/licenses/mit-license.php)\r\n\r\n\r\n## Install\r\n\r\n#### Bower\r\n\r\n```sh\r\nbower install knockout-validation --save\r\n```\r\n\r\n#### NuGet\r\n\r\n```ps1\r\nPM> Install-Package Knockout.Validation\r\n```\r\n\r\n#### NPM\r\n\r\n```sh\r\nnpm install knockout.validation --save\r\n```\r\n\r\n#### CDN\r\n\r\n##### [cdnjs](https://cdnjs.com/libraries/knockout-validation)\r\n* https://cdnjs.cloudflare.com/ajax/libs/knockout-validation/2.0.4/knockout.validation.js\r\n* https://cdnjs.cloudflare.com/ajax/libs/knockout-validation/2.0.4/knockout.validation.min.js\r\n\r\n##### [jsdelivr](http://www.jsdelivr.com/#!knockout.validation)\r\n- https://cdn.jsdelivr.net/npm/knockout.validation@2.0.4/dist/knockout.validation.js\r\n- https://cdn.jsdelivr.net/npm/knockout.validation@2.0.4/dist/knockout.validation.min.js\r\n\r\n\r\n## Getting Started\r\n```javascript\r\n//start using it!\r\nvar myValue = ko.observable().extend({ required: true });\r\n\r\n//oooh complexity\r\nvar myComplexValue = ko.observable().extend({\r\n required: true,\r\n minLength: 3,\r\n pattern: {\r\n message: 'Hey this doesnt match my pattern',\r\n params: '^[A-Z0-9].$'\r\n }\r\n });\r\n\r\n//or chaining if you like that\r\nvar myComplexValue = ko.observable()\r\n\r\nmyComplexValue.extend({ required: true })\r\n .extend({ minLength: 3 })\r\n .extend({ pattern: {\r\n message: 'Hey this doesnt match my pattern',\r\n params: '^[A-Z0-9].$'\r\n }});\r\n\r\n//want to know if all of your ViewModel's properties are valid?\r\nvar myViewModel = ko.validatedObservable({\r\n property1: ko.observable().extend({ required: true }),\r\n property2: ko.observable().extend({ max: 10 })\r\n});\r\n\r\nconsole.log(myViewModel.isValid()); //false\r\n\r\nmyViewModel().property1('something');\r\nmyViewModel().property2(9);\r\n\r\nconsole.log(myViewModel.isValid()); //true\r\n\r\n```\r\nsee more examples on the Fiddle: http://jsfiddle.net/KHFn8/5424/\r\n\r\n## Native Validation Rules\r\n**Required**:\r\n\r\n```javascript\r\nvar myObj = ko.observable('').extend({ required: true });\r\n```\r\n**Min**:\r\n\r\n```javascript\r\nvar myObj = ko.observable('').extend({ min: 2 });\r\n```\r\n**Max**:\r\n\r\n```javascript\r\nvar myObj = ko.observable('').extend({ max: 99 });\r\n```\r\n**MinLength**:\r\n\r\n```javascript\r\nvar myObj = ko.observable('').extend({ minLength: 3 });\r\n```\r\n**MaxLength**:\r\n\r\n```javascript\r\nvar myObj = ko.observable('').extend({ maxLength: 12 });\r\n```\r\n**Email**:\r\n\r\n```javascript\r\nvar myObj = ko.observable('').extend({ email: true });\r\n```\r\n\r\n... and [MANY MORE](https://github.com/Knockout-Contrib/Knockout-Validation/wiki/Native-Rules)\r\n\r\n_Much thanks to the [jQuery Validation Plug-In](https://github.com/jzaefferer/jquery-validation) team for their work on many of the rules_\r\n## Custom Validation Rules\r\n#### Custom Rules\r\nCustom Rules can be created using the simple example below. All you need is to define a validator function and a default message.\r\nThe validator function takes in the observable's value, and the `params` that you pass in with the `extend` method.\r\n\r\n```javascript\r\nko.validation.rules['mustEqual'] = {\r\n validator: function (val, params) {\r\n return val === params;\r\n },\r\n message: 'The field must equal {0}'\r\n};\r\nko.validation.registerExtenders();\r\n\r\n//the value '5' is the second arg ('params') that is passed to the validator\r\nvar myCustomObj = ko.observable().extend({ mustEqual: 5 });\r\n```\r\nLearn more about Custom Rules on the [WIKI](https://github.com/Knockout-Contrib/Knockout-Validation/wiki/Custom-Validation-Rules)\r\n\r\n**Or Check out our [User-Contributed Custom Rules](https://github.com/Knockout-Contrib/Knockout-Validation/wiki/User-Contributed-Rules)!**\r\n\r\n## HTML5 Validation Attributes\r\n\r\n**Required**:\r\n\r\n```html\r\n\r\n```\r\n\r\n**Min**:\r\n\r\n```html\r\n\r\n\r\n\r\n```\r\n\r\n**Max**:\r\n\r\n```html\r\n\r\n\r\n\r\n```\r\n\r\n**Pattern**:\r\n\r\n```html\r\n\r\n```\r\n\r\n**Step**:\r\n\r\n```html\r\n\r\n```\r\n**Special Note, the 'MinLength' attribute was removed until the HTML5 spec fully supports it**\r\n\r\n## Knockout Bindings\r\n\r\n### ValidationMessage\r\nIf you want to customize the display of your objects validation message, use the `validationMessage` binding:\r\n\r\n```html\r\n
\r\n \r\n

\r\n
\r\n```\r\nCheck out more on [Validation Bindings](https://github.com/Knockout-Contrib/Knockout-Validation/wiki/Validation-Bindings)\r\n\r\n## Remote Validation Rules\r\nCheck out our [Async Validation](https://github.com/Knockout-Contrib/Knockout-Validation/wiki/Async-Rules) and [jQuery AJAX Validation](https://github.com/ericmbarnard/Knockout-Validation/wiki/Async-Rules)\r\n\r\n## Localization\r\n\r\nAdd a reference to the localization js files after the Knockout Validation plugin\r\n\r\n```html\r\n\r\n\r\n\r\n\r\n```\r\n\r\nApply localized messages\r\n\r\n```js\r\nko.validation.locale('el-GR');\r\n```\r\n","maintainers":[{"name":"crissdev","email":"criss.trifan@gmail.com"},{"name":"stevegreatrex","email":"a@b.com"}],"time":{"modified":"2022-06-19T09:06:31.751Z","created":"2013-11-04T17:05:14.563Z","2.0.0-Pre":"2013-11-04T17:11:30.322Z","2.0.0-pre.1":"2013-11-06T14:23:45.417Z","2.0.0-pre.2":"2013-11-08T15:17:42.271Z","2.0.0-pre.3":"2013-11-08T15:22:25.759Z","2.0.0":"2015-01-21T17:44:38.015Z","2.0.1":"2015-01-26T11:13:35.600Z","2.0.2":"2015-02-02T09:52:43.108Z","2.0.3":"2015-05-18T09:42:22.145Z","2.0.4":"2019-10-09T08:16:25.027Z"},"author":{"name":"@ericmbarnard"},"repository":{"type":"git","url":"git+https://github.com/Knockout-Contrib/Knockout-Validation.git"},"users":{"bdukes":true,"asereware":true,"rbeadie":true},"bugs":{"url":"https://github.com/Knockout-Contrib/Knockout-Validation/issues"},"license":"MIT","readmeFilename":"README.md","homepage":"https://github.com/Knockout-Contrib/Knockout-Validation#readme"}