Starting today, Compose Multiplatform 1.2 is available for you to use! This latest version of the declarative UI framework for Kotlin brings compatibility with the latest Kotlin version and introduces several powerful features for the desktop target. Specifically, here are the highlights: The newly added ProGuard support allows you to minify and obfuscate your application before shipping.Focus management is being improved, resulting in better keyboard navigation through form elements.A reworked API for handling mouse and keyboard input makes it more convenient to implement actions that reac

Victor Kropp, the Team Lead for the Toolbox team at JetBrains, shares the story of adopting Kotlin and Compose Multiplatform on desktop. The JetBrains Toolbox App is the single entry point for developing using JetBrains IDEs. It serves as a control panel for tools and projects, and makes installing and updating JetBrains IDEs quick and easy. Originally started in 2015 as a hackathon project, the application now serves one million monthly active users, and helps them be more productive with their JetBrains products. Read on to understand how the Toolbox team moved their application from

The nautical advent-ure continues with the third day of AOC 2021, which we will, of course, once more solve in Kotlin! This time, it will involve wrangling binary numbers in all sorts of ways. Check out the solution and a detailed explanation on YouTube, or follow along as we explain our solution in this blog post! https://www.youtube.com/watch?v=mF2PTnnOi8w Solving part 1 We’re on maintenance duty today: That means we’re working with a report of binary numbers. Our goal is to calculate two values in order to get our gold star. They are referred to as the gamma and epsilon rate in t

Compose Multiplatform by JetBrains, the declarative UI framework for Kotlin, has reached version 1.0, which makes it ready for production use! Here are a few highlights that we hope will make you as excited about the release of this framework as we are: On desktop, you can now create Kotlin apps with beautiful user interfaces quickly and efficiently.On the web, you can now build production-quality dynamic web experiences using Compose for Web's stable DOM API with full interoperability with all browser APIs. Support for Material UI widgets will be available in a future release.Overall, shar

It’s that magical time of the year! Supermarkets are stocking cookies, the smell of cinnamon and roasted chestnuts fills the air, and maybe you’ll even see some snowflakes fall in front of your window. It can only mean one thing: Advent of Code is coming! It starts December 1, when the first of twenty-five coding puzzles is unlocked. From then on, a new coding challenge comes out each day. Whether you’re a beginner programmer or seasoned professional, there isn’t a better or cozier way to give your problem-solving skills a workout than the fun seasonal challenges from adventofcode.com.

Compose Multiplatform, the declarative UI framework for Kotlin, has reached Beta. This brings Compose for Desktop and Compose for Web another step closer to their stable release later this year. Here are the highlights: We are starting to stabilize APIs in preparation for the 1.0 release, and we’re explicitly marking experimental interfaces.Compose Multiplatform now references Android artifacts published by Google eliminating compatibility issues.Compose for Desktop has received multiple improvements: Improved stability on problematic hardware/drivers via smart fallback to software renderin

Recently we published a blog post about a potential security issue caused by ua-parser-js, a dependent package that is used in the popular testing framework Karma, which in turn is the default choice for Kotlin/JS and Kotlin Multiplatform applications targeting JS. In the post, we recommended that you may want to consider locking packages you depend on to a certain version. Here, we want to share with you how you can accomplish that with Kotlin/JS. We recommend everyone to add the snippets below to their Kotlin projects targeting JavaScript. How npm dependencies are managed Dependenci

Today in “Idiomatic Kotlin”, we’re solving another Advent of Code challenge. We will be simulating, diagnosing, and fixing a small, made up game console! If you have ever wanted to implement your own virtual machine or emulator for an existing system like a game console or a retro computing device, you’ll find this issue particularly interesting! As usual, a number of Kotlin features will help us achieve that goal, like sealed classes, sequences, and immutability. Understanding the challenge The story of Advent of Code 2020, Day 8 goes like this: A passenger on our flight hands

Today in “Idiomatic Kotlin”, we’re looking at day 4 of the Advent of Code 2020 challenges, in which we tackle a problem that feels as old as programming itself: input sanitization and validation. (more…)

Today’s release marks another step in our grand unified theory of UI development with Kotlin! We have a lot of news to talk about for our multiplatform UI efforts, including Compose for Desktop and Compose for Web. Today's announcement builds on Google's news last week that Jetpack Compose is now in 1.0 stable for Android. Here are the highlights: Compose for Desktop and Compose for Web are being promoted to Alpha. Their versioning is now aligned under the Compose Multiplatform umbrella, making it possible to build Android, Desktop, and Web UIs with the same artifacts.The JetBrains Toolbox

More desktop UI goodies are coming your way! Milestone 4, the latest version of Compose for Desktop, comes packed with features to help you build even better Kotlin desktop applications with modern, declarative user interfaces based on Google’s modern toolkit. Visit the website In this post, we’ll walk you through some of the highlights of this release. They include: A new, experimental API for managing windows, dialog boxes, menu bars, and tray icons, now based on the @Composable mechanismSupport for tooltipsBetter support for pointer events, including access to native events to

kotlinx.serialization 1.2 is out! The latest version of our multiplatform serialization library brings a number of improvements – here are the highlights: JSON serialization is faster than ever before. Version 1.2 is up to twice as fast as previous versions when parsing JSON into type-safe Kotlin objects and turning Kotlin objects into their text representations. Kotlin 1.5 type system additions are now supported. Value classes and unsigned numbers can be turned into JSON and back just like any other Kotlin class. New API documentation makes it easy to discover all the functionality kot