我需要动态加载横幅图像到HTML5应用程序,并希望几个不同的版本,以适应屏幕宽度。我不能正确地确定手机的屏幕宽度,所以我能想到的唯一方法是添加div的背景图像,并使用@media来确定屏幕宽度并显示正确的图像。
例如:
<span style="background-image:particular_ad.png; @media (max-width:300px){background-image:particular_ad_small.png;}"></span>
这可能吗,或者有人有其他建议吗?
是的,你可以通过window.matchMedia使用javascript
桌面为红色文本
绿色文字的平板电脑
移动为蓝色文本
//isat_style_media_query_for_desktop_mobile_tablets
var tablets = window.matchMedia("(max-width: 768px)");//for tablet devices
var mobiles = window.matchMedia("(max-width: 480px)");//for mobile devices
var desktops = window.matchMedia("(min-width: 992px)");//for desktop devices
isat_find_device_tablets(tablets);//apply style for tablets
isat_find_device_mobile(mobiles);//apply style for mobiles
isat_find_device_desktops(desktops);//apply style for desktops
// isat_find_device_desktops(desktops,tablets,mobiles);// Call listener function at run time
tablets.addListener(isat_find_device_tablets);//listen untill detect tablet screen size
desktops.addListener(isat_find_device_desktops);//listen untill detect desktop screen size
mobiles.addListener(isat_find_device_mobile);//listen untill detect mobile devices
// desktops.addListener(isat_find_device_desktops);
// Attach listener function on state changes
function isat_find_device_mobile(mob)
{
// isat mobile style here
var daynight=document.getElementById("daynight");
daynight.style.color="blue";
// isat mobile style here
}
function isat_find_device_desktops(des)
{
// isat mobile style here
var daynight=document.getElementById("daynight");
daynight.style.color="red";
// isat mobile style here
}
function isat_find_device_tablets(tab)
{
// isat mobile style here
var daynight=document.getElementById("daynight");
daynight.style.color="green";
// isat mobile style here
}
//isat_style_media_query_for_desktop_mobile_tablets
<div id="daynight">tricky style for mobile,desktop and tablet</div>