Haki

GUI framework with GTK4 component generation using HTML, CSS and JavaScript

None of the components generated by Layout contain anything remotely related to a Web-Browser.
Compiled binary reads the custom HTML and builds the GTK components. Since it is already a pre-built release version, it is pretty fast at generating the UI components.
The compiler supports CSS and JavaScript compilation, which glues the components and makes the UI interactive.
The JavaScript engine is Duktape, it supports Babel 6.26.0 and CoreJS 2.6.11.
The CSS is limited to GTK4 specification.

Installation

Before you clone the shard and build it, install the GTK libraries.

Add this to your application's shard.yml:

dependencies:
  haki:
    github: grkek/haki

And run this command in your terminal:

shards install
./bin/gi-crystal

Code example

Add this to your application.cr:

require "haki"

# Disable GC for now.
GC.disable

html = <<-HTML
  <Application applicationId="com.haki.application">
    <Window title="Untitled Window">
      <Label>Hello, World!</Label>
    </Window>
  </Application>
HTML

builder = Haki::Builder.new
# Make sure you point the path the correct way.
builder.build_from_string(html)

Compile the application.cr file.

crystal run application.cr -Dpreview_mt --error-trace

And you should have a GUI window with a "Hello, World!" text.