<html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta Name ="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body>! Row elements to block elements --> <! -- display:block; -- > <! Block elements to row elements --> <! -- display:inline; -- > <! -- Row-level block element, size can be set, but not newline --> <! -- display:inline-block --> <! -- Hide elements (hide all size content) --> <! -- display:none; --> </body> </html>Copy the code