H5页面 强制横屏显示 适配IOS和安卓

<script>
    var evt = "onorientationchange" in window ? "orientationchange" : "resize";
    $(window).resize(function(){
        resize();
    });
    window.addEventListener(evt, resize(), false);
    function resize(){
        var width = document.documentElement.clientWidth;
        var height =  document.documentElement.clientHeight;
        $contain =  $(‘#contain‘);
        if( width > height ){
            $contain.width("11.34rem");
            $contain.height("6.4rem");
            $contain.css(‘top‘,  "0rem");
            $contain.css(‘left‘,  "0rem");
        }else{
            $contain.width(height);
            $contain.height(width);
            $contain.css(‘top‘,  (height-width)/2 );
            $contain.css(‘left‘,  0-(height-width)/2 );
        }
    }
</script>

(function (doc, win) {
    var docEl = doc.documentElement,
        resizeEvt = ‘orientationchange‘ in window ? ‘orientationchange‘ : ‘resize‘,
        recalc = function () {
            var clientWidth = docEl.clientWidth;
            var clientHeight = docEl.clientHeight;
            if (!clientWidth) return;
            if($(window).width()<$(window).height()){
                docEl.style.fontSize = 100 * (clientWidth / 640) + ‘px‘;
            }else{
                docEl.style.fontSize = 100 * (clientWidth / 1134) + ‘px‘;
            }

        };
    recalc();
    if (!doc.addEventListener) return;
    win.addEventListener(resizeEvt, recalc, false);
    doc.addEventListener(‘DOMContentLoaded‘, recalc, false);
})(document, window);

@media screen and (orientation: portrait) {
    html{
        width : 100% ;
        height : 100% ;
        overflow : hidden;


    }
    body{
        width : 100% ;
        height : 100% ;
        overflow : hidden;
    }
    #contain{
        position : absolute ;
        transform:rotate(90deg);
        transform-origin:50% 50%;
    }
}
@media screen and (orientation: landscape) {

}