第二十天，HTML/Vue代码在线实时编辑、预览

<!DOCTYPE html> <html lang="pt-br"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="stylesheet" href="style.css"> <title>Dia 20</title> </head> <body> <a href="#">Desafio de CSS</a> </body> </html>

            
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            body 
{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #222;
}

a 
{
    text-decoration: none;
    color: white;
    font-family: sans-serif;
    font-size: 40px;
    border: 3px solid white;
    padding: 30px 70px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

a:hover 
{
    background-color: #000000;
}

a:before 
{
    content: '';
    background-color: white;
    top: 0;
    left: 0;
    width: 100%;
    height: 50px;
    position: absolute;
    transform: translateX(-100%) rotate(45deg);
    transition: all 0.3s;
}

a:hover:before 
{
     transform: translateX(100%) rotate(45deg);
}