<!DOCTYPE html> <html lang="en"> <head> <title> CSS Display None </title> <meta charset="UTF-8"> <style> #hidden { display: none; } </style> </head> <body> <h1>This line is a Visible.</h1> <h1 id="hidden">This line is a hidden.</h1> <p>This line is again visible.</p> </body> </html>.
