var detectOrient = function() {
var width = document.documentElement.clientWidth,
height = document.documentElement.clientHeight,
// $wrapper = document.getElementById("J_wrapper"),
$body = document.getElementsByTagName("body"),
style = "";
if( width >= height ){ // 横屏
style += "width:" + width + "px;"; // 注意旋转后的宽高切换
style += "height:" + height + "px;";
style += "-webkit-transform: rotate(0); transform: rotate(0);";
style += "-webkit-transform-origin: 0 0;";
style += "transform-origin: 0 0;";
}
else{ // 竖屏
style += "width:" + height + "px;";
style += "height:" + width + "px;";
style += "-webkit-transform: rotate(90deg); transform: rotate(90deg);";
// 注意旋转中点的处理
style += "-webkit-transform-origin: " + width / 2 + "px " + width / 2 + "px;";
style += "transform-origin: " + width / 2 + "px " + width / 2 + "px;";
}
$body[0].style.cssText = style;
};
window.onresize = detectOrient;
detectOrient();
//css旋转根元素
@media screen and (orientation: portrait){
body {
-webkit-transform:rotate(90deg);
-webkit-transform-origin:0% 0%;/*1.重置旋转中心*/
-moz-transform: rotate(90deg);
-moz-transform-origin:0% 0%;
-ms-transform: rotate(90deg);
-ms-transform-origin:0% 0%;
transform: rotate(90deg);
transform-origin:0% 0%;
width: 100vh;/*2.利用 vh 重置 ‘宽度’ */
height: 100vw;/* 3.利用 vw 重置 ‘高度’ */
top: 0;
left: 100vw;/* 4.旋转后页面超出屏幕,重置页面定位位置 */
}
}
强制横屏 利用 CSS3 旋转 对根容器逆时针旋转 90 度
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转载自blog.csdn.net/black2Girl/article/details/85100235
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