# javascript

Alexey Polyusov

08/23/2022, 8:57 PM
Hi guys! 🙂 I want to write an app that can be viewed in a web browser. I want to draw a lot of lines, squares etc on some canvas and make animations. I want to make some file processing (10-15 mb per file). I wish to load the entire file into RAM to speed things up. Not sure if I need multithreading. I have NO knowledge of JS\CSS\HTML at all, but I know Kotlin. What framework\library should I use for this task? Thanks!

Big Chungus

08/23/2022, 9:38 PM
I'm affraid kotlin is not a silver bullet. You'll still need to learn at least basic js/css/html to be able to work with kotlin.js in a browser environment.


08/23/2022, 10:00 PM
And JS is single-threaded, so no, you don't need multithreading. But maybe you want to use coroutines.

Tóth István Zoltán

08/24/2022, 2:30 AM
Well, you can use web workers for multithreading. You may try my application template. This is quite straightforward: clone project, run customization in gradle, put everything in Home.kt, run jsBrowserRun and that's it. Evertything is written in and there is quite extensive documentation on the web. No JS/HTML/CSS needed. This also includes a server (based on Ktor) with a minimal user management but you can easily comment that out.
👍🏾 1


08/24/2022, 5:25 AM
You can also check out Doodle. It doesn't use JS/CSS/HTML in any APIs. So your app won't need them. But it gives you a Canvas abstraction for drawing. This means lines etc. are very easy to create. This shows how simple it is to create a 3D cube. It also supports animations, as you can see in the search bar (focus/unfocus) of this example app. The code for this is straight forward.

Alexey Polyusov

08/24/2022, 7:06 AM
thank you guys!