---
# System prepended metadata

title: 'NativeScript 6.3:'

---

# NativeScript 6.3: 

It's a wrap! Our final release for 2019 is here. It's meant to make your development experience faster and smoother.

## New Optional CSS Parser
6.3 brings a brand new CSS Parser, which provides up to 30% faster startup time according to our tests. This parser is already the default one in the `next` versions of the framework. 

## Faster CLI Commands
Prior to this release, every command was making sure that the environment is set up correctly before doing its job (similar to executing `tns doctor`). You can bet that this is a costly overhead and we decided to cache this result and reuse for every consequent operation, until the environment is changed. This should make every command 10-12s faster. While this might not be noticed on some slower commands like `tns run`, just try `tns --version` with 6.2 and 6.3 after that.

## HMR working with the nativescript-worker-loader package
Up to now, all application that were using the nativescript-worker-loader package (either directly or as a dependency) couldn't benefit from the HMR functionality for various technical reasons. This will no longer be the case and the usage of this plugin will not impose any restrictions on the developer experience.

## Scoped Packages Independent from the Regular Ones
In 6.3, developers can use the scoped packages like @nativescript/core, @nativescript/angular, etc. without the need to install the older packages as well. Those are now entirely independent implementations.

## Svelte.js Support in the Playground
We are always trilled the community does something cool and we always try to showcase this work as much as possible. [David Pershouse](https://www.nativescript.org/blog/an-interview-with-svelte-native-creator-david-pershouse) has been working tirelessly to provide a solid story for developing mobile applications with Svelte using NativeScript. We are happy to offer this as a starting point of your projects in the [NativeScript Playground](https://play.nativescript.org/?template=play-svelte).

## Community Contributions
Some cool PRs by the community got merge in this release as well:

 - [edusperoni](https://github.com/edusperoni) added `requestAnimationFrame` as a supported function
 - [slolam](https://github.com/slolam) added width and height properties to the dialog for sizing purposes

## Others
We did some maintenance tasks like:

 - Update the version of V8 to 7.8.279.19
 - Update the version for JSCore to 13.2
 - Provide support for Node.js 13