This task is from the challenge "30 projects in 30 days", in which I made Simplest image editor
by vanilla JS. You can use it for your own purposes.
You can see the working UI/UX of this task by the link: https://khanevich.github.io/CssVar/
Clone this repo into new project folder (e.g., CssVar).
git clone https://github.com/khanevich/CssVar CssVar
cd CssVar