:target
selects the HTML element with the attribute id
that is the currently selected target of a <a href="…#tgt">
link. <!DOCTYPE html> <html> <head> <meta content="text/html;charset=utf-8" http-equiv="Content-Type"> <title>CSS - :target pseudo class</title> <style> :target { background-color: navajowhite; } </style> </head> <body> <p>This paragraph has no id.</p> <p id='x'>This paragraph has has id=x and a <a href='#z'>link to z</a>.</p> <p id='y'>This paragraph has has id=y.</p> <p>This paragraph has no id and a <a href='#y'>link to y</a>.</p> <p id='z'>This paragraph has has id=z</p> </body> </html>