Answers for "css box border"

border-box css

#example1 {
  box-sizing: border-box;
}

border box css

/*universial selector example to include padding, border, and margin 
in all box sizing totals*/
* {
  box-sizing: border-box;
}
/*example of div that will total 100% and not exceed it because it
is using the border-box property*/
div {
box-sizing: border-box;
width: 100%;
border: solid #5B6DCD 10px;
padding: 5px;
margin: 10px;
}

how to style rule to apply the Border Box model css

header, ul, nav, li, a /* other elements */{

 display: block;
   -webkit-box-sizing: border-box;
   -moz-box-sizing: border-box;
   box-sizing: border-box;