html5 - 刚接触移动端开发，请教下移动端使用vh，vw单位做布局，点击输入框后键盘弹出会挤压内容怎么处理？

Question

Answer 1

The middle part is made scrollable

Answer 2

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";
        }
    };