1. Reason to reach for the button "Calculate" using css(
2. Referring to the example of my proektika show you how to connect to animate.css? I want to animate that appears by clicking on the button.
3. When aiming to repaint a black square to select the color when you hover.
Thank you in advance for your help! :))
jsfiddle.net/rainiscool/hcfatajz/6