break whitespace css code example

Example 1: css remove whitespace around element

body { margin:0px; }

header { border:1px black solid; }

Example 2: how to have white space in css

#HTML_code
<h1> 
	My text
	<span>
		Here my white space
	</span>
</h1>

#Css_Code
h1 span::before
{
  content: "\A";
  white-space:pre;
}