The fastest (Vanilla.js based) front-end javascript framework

Usage no npm install needed!

<script type="module">
  import vasilleJs from '';



Vasille.js logo
Vasille.js is very fast javascript frontend framework, it is not using virtual DOM, it updates DOM directly using an own reactive mechanism.

This framework is in active development, if you want to contribute contact the maintainer: Lelițac Vasile (

Table of content


Project roadmap

Feature Deadline Status
Initial Version 01.07.2021 Ready
Patch to 1.1 02.12.2021 Ready
Describe API 02.14.2021 Ready
Describe JS API 02.15.2021 Ready
Describe VCC architecture 02.22.2021 Waiting
Code and debug VCC 03.xx.2021
First enterprise ready version xx.xx.2021
Boost by HTML templates xx.xx.2021

API documentation

Currently, the API is in development, but the JavaScript API is available.

Tools in development

  • Vasille.js is a component based framework without any dependencies
  • Reactive Reference is a build in reactivity library of Vasille.js
  • Vasille Language is a user-friendy language to describe Vasille.js components
  • VCC (Vasille Component Compiler) translate code from Vasille language to high-effective Vasille.js components performing a lot of performance improvements.

How it works

To test the speed of frameworks (inclusive Vasille JS) I had created a map, which can be zoomed up to 32x, this project was called "Project x32".

On the next image is demonstrated the difference between 1x zoom (on the left side) and x32 zoom (on the right side): x1-x32

There are 100 random squares over each brick, on small zoom the squares are hidden to optimize browser performance, because the page is composed of over than 23 000 nodes. The random squares added one by one to not freeze zoom animation. The zoom animation duration is 300ms, and it must consist of 20 frames on 60Hz screen.

The project x32 was coded using the next frameworks:

  • Angular.
  • React.
  • Vue 2.
  • Vue 3.
  • Svelte.
  • Vasille JS.

Measuring zoom performance

After zooming in each production build and measuring performance I had got the next results: results 1

The Vue & React builds are the slowest: the average frame time of:

  • React build is 1263.48ms.
  • Vue 3 build is 971.80ms.
  • Vue 2 build is 823.56ms.

There is the same graphic in logarithmic scale: results 1

Let's analyze the Angular, Svelte & Vasille JS results:

  • Angular & Svelte has a similar result, the average time of frame is 53.94ms for Angular & 53.98 for Svelte.
  • The Vasille JS is the unique framework which support the zoom animation at 60fps without any additional optimization.
    Average time of frame is 3.22ms.

Try it:

Let's optimize Project x32

To optimize the Project x32 realizations, the optimization consist of removing the off-screen components, that change will decrease the number of components. So let's zoom each optimized build from x1 to x32.

Tests results: results 2

After X8 the number of onscreen components is very small, the optimization has a good result. The Reactive frameworks are the slowest before and after optimization.

There is the same graphic in logarithmic scale: results 2

After optimization Angular, Svelte & Vasille JS has very good results close to Vasille JS before optimization.

Try it:


The main goal of Vasille JS is not to be the fastest JavaScript framework, but to ensure excellent performance without any optimizations.


If you have questions, fell free to contact the maintainer of project: