AS
HTML e CSS
Responsive Web Design
Codice pagina HTML
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" media="(max-width: 600px)" href="css/cssExample_phone.css">
<link rel="stylesheet" media="(min-width: 600px)" href="css/cssExample_tabletP.css">
<link rel="stylesheet" media="(min-width: 768px)" href="css/cssExample_tabletL.css">
<link rel="stylesheet" media="(min-width: 992px)" href="css/cssExample_laptop.css">
<link rel="stylesheet" media="(min-width: 1200px)" href="css/cssExample_desktop.css">
<link rel="stylesheet" media="(min-width: 1600px)" href="css/cssExample_big.css">
</head>
<body>
<div id="cssExample_titolo">
Responsive Web Design
</div>
<div id="cssExample_div1">
La configurazione attualmente attiva &#232;: <b>
<span id="cssExample_phone_descrId">max-width:600px (phone)</span>
<span id="cssExample_tabletP_descrId">min-width:600px (tablet portrait)</span>
<span id="cssExample_tabletL_descrId">min-width:768px (tablet landscape)</span>
<span id="cssExample_laptop_descrId">min-width:992px (laptop)</span>
<span id="cssExample_desktop_descrId">min-width:1200px (desktop)</span>
<span id="cssExample_big_descrId">min-width:1600px (big screen)</span>
</b><br>
Se possibile, ridimensionare la finestra per apprezzare i cambiamenti.
</div>
<div id="cssExample_row">
<div id="cssExample_div2">
Fino ad una risoluzione con larghezza pari a 600px, viene usato il foglio di stile <i>cssExample_phone.css</i>, per risoluzioni maggiori il browser utilizzer&#224; il foglio <i>cssExample_tabletP.css</i>.<br>
Via via che vengono raggiunte le altre soglie di larghezza, si aggiungono in cascata gli altri fogli, secondo la logica dei <i>CSS</i>. Questo significa che, rispetto al <i>cssExample_tabletP.css</i>, i file successivi conterranno solo le variazioni necessarie.
</div>
<div id="cssExample_div3">
La variet&#224; dei devices utilizzati per la navigazione rende imprescindibile l'attenzione alla responsivit&#224; nella progettazione di una pagina WEB.<br>
Non da ultimo, il <i>Google ranking</i> tiene in somma considerazione tale aspetto.
</div>
</div>
</body>
</html>
cssExample_phone.css
html,body{
height: 100%;
font-family:Verdana;
font-size:0;
color:#333;
margin:0px;
padding:0px;
border-style:none;
}
div{box-sizing:border-box;}
div#cssExample_titolo{
position:relative;
display:block;
font-size:26px;
font-weight:bold;
line-height:70px;
background-color:#dfd;
border:1px solid #ccc;
padding:10px 5%;
}
div#cssExample_div1{
position:relative;
display:block;
font-size:20px;
line-height:30px;
background-color:#fdd;
border:1px solid #ccc;
padding:10px 5%;
}
div#cssExample_div2, div#cssExample_div3{
position:relative;
display:block;
font-size:16px;
line-height:22px;
background-color:#ffd;
border:1px solid #ccc;
padding:10px 5%;
}
#cssExample_phone_descrId{
}
#cssExample_tabletP_descrId,
#cssExample_tabletL_descrId,
#cssExample_laptop_descrId,
#cssExample_desktop_descrId,
#cssExample_big_descrId{
position:absolute; display:none; visibility:hidden;
}
cssExample_tabletL.css
div#cssExample_div2, div#cssExample_div3{
display:inline-block;
width: 50%;
vertical-align:top;
}
#cssExample_tabletL_descrId{
position:relative; display:inline; visibility:visible;
}
#cssExample_tabletP_descrId{
position:absolute; display:none; visibility:hidden;
}
cssExample_desktop.css
div#cssExample_titolo,
div#cssExample_div1{
padding:15px 7%;
}
div#cssExample_div2, div#cssExample_div3{
display:inline-block;
width:50%;
padding:15px 7%;
}
#cssExample_desktop_descrId{
position:relative; display:inline; visibility:visible;
}
#cssExample_laptop_descrId{
position:absolute; display:none; visibility:hidden;
}
cssExample_tabletP.css
html,body{
height: 100%;
font-family:Verdana;
font-size:0;
color:#333;
margin:0px;
padding:0px;
border-style:none;
}
div{box-sizing:border-box;}
div#cssExample_titolo{
position:relative;
display:block;
font-size:26px;
font-weight:bold;
line-height:70px;
background-color:#dfd;
border:1px solid #ccc;
padding:10px 5%;
}
div#cssExample_div1{
position:relative;
display:block;
font-size:20px;
line-height:30px;
background-color:#fdd;
border:1px solid #ccc;
padding:10px 5%;
}
div#cssExample_div2, div#cssExample_div3{
position:relative;
display:block;
font-size:16px;
line-height:22px;
background-color:#ffd;
border:1px solid #ccc;
padding:10px 5%;
}
#cssExample_tabletP_descrId{
}
#cssExample_phone_descrId,
#cssExample_tabletL_descrId,
#cssExample_laptop_descrId,
#cssExample_desktop_descrId,
#cssExample_big_descrId{
position:absolute; display:none; visibility:hidden;
}
cssExample_laptop.css
div#cssExample_titolo{
font-size:30px;
line-height:100px;
}
div#cssExample_div1{
display:inline-block;
font-size:24px;
line-height:32px;
width:40%;
}
div#cssExample_row{
position:relative;
display:inline-block;
width:60%;
vertical-align:top;
}
div#cssExample_div2, div#cssExample_div3{
display:block;
width:100%;
}
#cssExample_laptop_descrId{
position:relative; display:inline; visibility:visible;
}
#cssExample_tabletL_descrId{
position:absolute; display:none; visibility:hidden;
}
cssExample_big.css
div#cssExample_titolo,
div#cssExample_div1,
div#cssExample_div2,
div#cssExample_div3{
padding:20px 10%;
}
#cssExample_big_descrId{
position:relative; display:inline; visibility:visible;
}
#cssExample_desktop_descrId{
position:absolute; display:none; visibility:hidden;
}
Risultato
indietro