<!DOCTYPE html> <meta charset="utf-8"> <title>display: block math and inline math on pseudo elements (reference)</title> <style> .inline::before { content: 'math'; display: inline; } .inline::after { content: 'math'; display: inline; } .block::before { content: 'math'; display: block; } .block::after { content: 'math'; display: block; } </style> <p>Test passes if SPAN and DIV are respectively surrounded by inline and block "math" text.</p> <div> <span class="inline">SPAN</span> </div> <div> <span class="block">DIV</span> </div>