Hello, this is my Markdown Previewer project
I could still polish the code a bit more, but got exhausted with the project and it looks complete enough. The CSS went more loaded than i anticipated, but it was good practice for flex and grid, which i used to make the page responsive in different circumstances.
You can see its built with React and it uses Bootstrap for some appearance. Im happy about a component which renders buttons with different classes, appearance and functionalities. There are interactive buttons, some able to switch the colors. You could even add additional color button, by writing bootstrap color in the array responsible for keeping their values.