移动端fixed定位在底部,出现键盘后消失

jq

var h=$(window).height();
$(window).resize(function() {
if($(window).height()<h){
$('.nav').hide(); 
} if($(window).height()>=h){
 $('.nav').show(); 

} 
});

js

var h = document.body.scrollHeight;
    window.onresize = function(){
        if (document.body.scrollHeight < h) {
            document.getElementsByTagName("nav")[0].style.display = "none";
        }else{
            document.getElementsByTagName("nav")[0].style.display = "block";
        }
    };