![KVision Logo](graphics/kvision-logo.png?raw=true "KVision") # KVision Object oriented web framework for Kotlin/JS. [![Travis CI](https://travis-ci.com/rjaros/kvision.svg?branch=master)](https://travis-ci.com/rjaros/kvision) [![Download](https://api.bintray.com/packages/rjaros/kotlin/kvision/images/download.svg) ](https://bintray.com/rjaros/kotlin/kvision/_latestVersion) [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT) [![Chat: on slack](https://img.shields.io/badge/chat-on%20slack-green.svg)](https://kotlinlang.slack.com/?redir=%2Fmessages%2FCL4C1SLKC) KVision allows you to build modern web applications with the [Kotlin](https://kotlinlang.org) language, without any use of HTML, CSS or JavaScript. KVision prefers the imperative style of programming. It's object oriented and supports many well known OOP design patterns. It gives you a hierarchy of many different components, which are used as a builder blocks for the application GUI. KVision's design is quite similar to many non-web UI programming libraries including Swing, JavaFX, QT, WinForms and Flutter. KVision contains innovative connectivity interface for [Ktor](https://ktor.io/), [Jooby](https://jooby.org), [Spring Boot](https://spring.io/projects/spring-boot) and [Javalin](https://javalin.io) frameworks on the server side, which allows to build full-stack, multiplatform applications with shared common code. **KVision is being actively developed. Please create an issue for any bugs or feature requests.** ## Features - 100% type safe and fully compiled dev environment. - Type safe DSL builders. - Based on [Bootstrap](https://getbootstrap.com/) styles, typography and components. - Utilizes [Snabbdom](https://github.com/snabbdom/snabbdom) fast virtual DOM implementation. - Integrates with a lot of libraries and components: - [Font awesome](https://fontawesome.com/) - [Bootstrap Select](https://github.com/silviomoreto/bootstrap-select) (with [AJAX](https://github.com/truckingsim/Ajax-Bootstrap-Select) extension) - [Awesome Bootstrap Checkbox](https://github.com/flatlogic/awesome-bootstrap-checkbox) - [Trix editor](https://trix-editor.org/) - [Bootstrap Datetime picker](https://github.com/pingcheng/bootstrap4-datetimepicker) - [Bootstrap touchspin](https://github.com/istvan-ujjmeszaros/bootstrap-touchspin) - [Bootstrap File Input](http://plugins.krajee.com/file-input) - [Bootstrap Typeahead](https://github.com/eduardoinf/Bootstrap-3-Typeahead) - [Handlebars](http://handlebarsjs.com/) - [Chart.js](https://www.chartjs.org/) - [Tabulator](http://tabulator.info/) - [Redux](https://redux.js.org/) - [ReduxKotlin](https://reduxkotlin.org/) - [Navigo](https://github.com/krasimir/navigo) - [Moment.js](https://momentjs.com/) - [Pace](https://github.hubspot.com/pace/docs/welcome/) - [Leaflet](https://leafletjs.com/) - Includes sophisticated layout containers, including CSS flexbox, CSS grid and Bootstrap responsive 12 columns grid. - Includes convenient forms implementation, with support for many different input components and easy to use validation. - Supports an observer pattern for data bindings. - Internationalization support based on [Jed](http://messageformat.github.io/Jed/) library and [gettext](https://www.gnu.org/software/gettext/) translations. - Easy to use Drag & Drop support. - Type-safe REST connectivity. - Support for event Flows. - Innovative integration interface for [Ktor](https://ktor.io), [Jooby](https://jooby.org), [Spring Boot](https://spring.io/projects/spring-boot) and [Javalin](https://javalin.io) frameworks on the server side, including support for type-safe websockets connections. - Support for building hybrid mobile applications with [Apache Cordova](https://cordova.apache.org/). - Support for building cross-platform, desktop applications with [Electron](https://electronjs.org). - KVision applications are built with [Gradle](https://gradle.org/) with support for Webpack's [Hot Module Replacement (HMR)](https://webpack.js.org/concepts/hot-module-replacement/) and [Kotlin JavaScript DCE (dead code elimination)](https://kotlinlang.org/docs/reference/javascript-dce.html). Kotlin compiler plugin for Gradle is available to automatically generate boilerplate code for server-side interfaces. - [Karma](https://karma-runner.github.io/) testing framework support. - IDE support (IntelliJ IDEA Community Edition). ## Examples and documentation Ready to explore, rich set of [KVision examples](https://github.com/rjaros/kvision-examples) is available in the separate project. The comprehensive [KVision guide](https://kvision.gitbook.io/kvision-guide/) is published on GitBook. Full API documentation (KDoc) is available at [https://rjaros.github.io/kvision/api/](https://rjaros.github.io/kvision/api/). You can also look at [KVision blog posts at dev.to](https://dev.to/t/kvision/latest) and you can talk with KVision developers on Kotlin Slack [#kvision](https://kotlinlang.slack.com/messages/kvision/) channel. If you are interested in the documentation for KVision 1.x (based on Bootstrap 3), you can [find the guide here](https://kvision.gitbook.io/kvision-guide/v/kvision-1.x/) and the [API docs here](https://rjaros.github.io/kvision/api1/). ## Quickstart #### Development 1. Download [KVision examples](https://github.com/rjaros/kvision-examples) from GitHub: git clone https://github.com/rjaros/kvision-examples.git 2. Enter one of the examples directory: cd kvision-examples/showcase (on Linux) cd kvision-examples\showcase (on Windows) 3. Run Gradle incremental build with: ./gradlew -t run (on Linux) gradlew.bat -t run (on Windows) 4. Open [http://localhost:3000/](http://localhost:3000/) in your browser. 5. Play with the code and see your changes immediately in the browser. #### Production To build complete application optimized for production run: ./gradlew -Pprod=true zip (on Linux) gradlew.bat -Pprod=true zip (on Windows) Application package will be saved as build/libs/showcase-1.0.0-SNAPSHOT.zip. ## Code samples ### Hello world root("root") { span("Hello world!") } ### Basic components interactions using type safe DSL builders root("root") { hPanel(spacing = 20, alignItems = FlexAlignItems.CENTER) { val label = span("Not yet clicked.") var count = 0 button("Click me").onClick { label.content = "You clicked the button ${++count} times." } } } ### Tab panel with JavaScript routing val firstPanel = Div("First") val secondPanel = Div("Second") val thirdPanel = Div("Third") root("root") { tabPanel { addTab("First", firstPanel, route = "/first") addTab("Second", secondPanel, route = "/second") addTab("Third", thirdPanel, route = "/third") } } ### Type safe forms @Serializable data class Model(val username: String? = null, val password: String? = null) root("root") { formPanel { add(Model::username, Text(label = "Username"), required = true) add(Model::password, Password(label = "Password"), required = true) add(Button("OK").onClick { val data: Model = this@FormPanel.getData() println("Username: ${data.username}") println("Password: ${data.password}") }) } } ### Observer design pattern data class Data(val text: String) val model = observableListOf( Data("One"), Data("Two"), Data("Three") ) root("root") { dataContainer(model, { data, _, _ -> Span(data.text) }, HPanel(spacing = 10)) } model.reverse()