Tips for css on it practical in real life projects?

i just read few tips on css3 styling
like if u set

  font-size :100% 

it will help to make your text responsive or

 * {
  box-sizing: border-box;

will give better results then giving this arrtibute to every elements
i wanted to ask that people actually do these kinda things in their original works?

There’s no real reason not to use them, we’ve often had to use some sort of “reset style” to make browsers do what we want. Notably, Eric Meyer had a great reset.css stylesheet, thing was a great way of reducing CSS inconsistencies between browsers.

If you’d like to learn more about the debate about “universal selectors”, there’s a plethora of articles about it. Here’s one, considerably older but still pretty relevant:

1 Like