有没有一种方法/jQuery 方法可以单独测量视口(viewport)高度？
本地址栏显示时一个 vh，本地址栏隐藏时另一个 vh？
var vhAdBarPresent = $(window).height();
var vhAdBarHidden = $(window).height();
我用谷歌搜索了这个问题，无意中发现了各种文章，其中他们通过从常规 100vh 中添加或减去 56px 来手动补偿地址栏。
这是我们唯一的选择吗？ 56px 仅适用于 chrome 其他浏览器可能具有不同的地址栏高度...
我想做的就是制作一个可拖动的底部导航，它默认位于底部，一旦使用 handle 向上拖动，它就会覆盖整个视口(viewport)。但是页脚只是拒绝留在底部。
您可以在我的 Github Demo 上看到我面临的问题. 在 android chrome 中打开(它在桌面浏览器上按预期工作，但在隐藏滚动地址栏的移动浏览器中，它会中断。)
在此演示中，我尝试将页脚对齐到屏幕底部。 但是当拖动页脚/滚动页面时，它不会位于底部。
这是供您引用的代码...
$(function() {
var dragFlag = 0;
var navPos = Math.round(0.93 * $(window).height());
var dragUL = Math.round(0.2 * navPos);
var dragLL = Math.round(0.8 * navPos);
console.log(dragFlag);
var $draggable = $('.draggable').draggabilly({
axis: 'y',
handle: '.handle'
});
var draggie = $('.draggable').data('draggabilly');
$draggable.on('dragEnd', function(event, pointer) {
var dragPosY = Math.round(draggie.position.y);
console.log("DPY: " + dragPosY + "; NP: " + navPos + "; dUL: " + dragUL + "; dLL: " + dragLL);
if (dragFlag === 0) {
if (dragPosY > dragLL) {
$draggable.draggabilly('setPosition', 0, navPos);
dragFlag = 0;
console.log(dragPosY + "DPY > DLL" + dragLL + "; DF:" + dragFlag);
}
if (dragPosY < dragLL) {
$draggable.draggabilly('setPosition', 0, 0);
dragFlag = 1;
console.log(dragPosY + "DPY < DLL" + dragLL + "; DF:" + dragFlag);
}
} else if (dragFlag === 1) {
if (dragPosY > dragUL) {
$draggable.draggabilly('setPosition', 0, navPos);
dragFlag = 0;
console.log(dragPosY + "DPY > DLL" + dragLL + "; DF:" + dragFlag);
}
if (dragPosY < dragUL) {
$draggable.draggabilly('setPosition', 0, 0);
dragFlag = 1;
console.log(dragPosY + "DPY < DLL" + dragLL + "; DF:" + dragFlag);
}
}
});
});* {
box-sizing: border-box;
}
html,
body {
margin: 0;
padding: 0
}
#content {
background: #222;
color: #ddd;
display: flex;
flex-direction: column;
align-items: center;
justify-content: space-between;
height: 300vh;
width: 100%;
padding-bottom: 60px;
}
#footer {
background: #f00;
color: #ddd;
height: 130vh;
display: flex;
width: 100%;
flex-direction: column;
position: fixed;
left: 0;
bottom: calc(-130vh + 7vh);
}
.handle {
background: #0ff;
color: #222;
display: flex;
flex-direction: row;
align-items: center;
justify-content: space-between;
height: 7vh;
width: 100%;
box-shadow: inset #cf0 0 3px;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>BotNav</title>
<script
src="https://code.jquery.com/jquery-3.4.1.min.js"
integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
crossorigin="anonymous"></script>
<script src="https://unpkg.com/draggabilly@2/dist/draggabilly.pkgd.min.js"></script>
<style>
*{box-sizing: border-box;}
html,body{margin: 0; padding:0}
#content{
background:#222; color:#ddd;
display: flex;
flex-direction: column;
align-items: center;
justify-content: space-between;
height: 300vh; width: 100%;
padding-bottom: 60px;
}
#footer{
background: #f00;color: #ddd;
height: 130vh;
display: flex; width: 100%; flex-direction: column;
position: fixed;
left: 0;
bottom: calc(-130vh + 7vh);
}
.handle{
background: #0ff;
color:#222;
display: flex; flex-direction: row;
align-items: center; justify-content: space-between;
height: 7vh;
width: 100%;
box-shadow: inset #cf0 0 3px;
}
</style>
<script>
$(function(){
var dragFlag = 0;
var navPos = Math.round(0.93*$(window).height());
var dragUL = Math.round( 0.2*navPos );
var dragLL = Math.round( 0.8*navPos );
console.log(dragFlag);
var $draggable = $('.draggable').draggabilly({
axis: 'y', handle:'.handle'
});
var draggie = $('.draggable').data('draggabilly');
$draggable.on( 'dragEnd', function( event, pointer ) {
var dragPosY = Math.round(draggie.position.y);
console.log("DPY: "+dragPosY+"; NP: "+navPos+"; dUL: "+dragUL+"; dLL: "+dragLL);
if(dragFlag === 0)
{
if(dragPosY>dragLL){
$draggable.draggabilly('setPosition',0,navPos);
dragFlag = 0;
console.log(dragPosY+"DPY > DLL"+dragLL+"; DF:"+dragFlag);
}
if(dragPosY<dragLL){
$draggable.draggabilly('setPosition',0,0);
dragFlag = 1;
console.log(dragPosY+"DPY < DLL"+dragLL+"; DF:"+dragFlag);
}
}
else if(dragFlag === 1)
{
if(dragPosY>dragUL){
$draggable.draggabilly('setPosition',0,navPos);
dragFlag = 0;
console.log(dragPosY+"DPY > DLL"+dragLL+"; DF:"+dragFlag);
}
if(dragPosY<dragUL){
$draggable.draggabilly('setPosition',0,0);
dragFlag = 1;
console.log(dragPosY+"DPY < DLL"+dragLL+"; DF:"+dragFlag);
}
}
});
});
</script>
</head>
<body>
<footer id="footer" class="draggable">
<div class="handle">
<span>Handle1</span>
<span>Handle2</span>
<span>Handle3</span>
</div>
<div class="footContent">Foot Content</div>
</footer>
<div id="content">
<div>Content Top</div>
<div>Content Bottom</div>
</div>
</body>
</html>如果我们能以某种方式提取当前的视口(viewport)高度，我们的生活就会容易得多......:(
最佳答案
您可以利用 JavaScript 中的 innerHeight 变量。每当进行可见性更改时，这都会更新浏览器界面。
let vh = window.innerHeight * 0.01;
document.documentElement.style.setProperty('--actualVh', `${vh}px`);section {
height: calc(var(--actualVh, 1vh) * 100);
}
.item {
align-items: center;
display: flex;
height: calc(100% / 5);
justify-content: center;
color:white;
}
.item:nth-child(odd) {
background-color: pink;
}
.item:nth-child(even) {
background-color: lightblue;
}<section>
<div class="item">One</div>
<div class="item">Two</div>
<div class="item">Three</div>
<div class="item">Four</div>
<div class="item">Five</div>
</section>关于javascript - 如何补偿滚动时android移动浏览器的隐藏地址栏？如何在所有浏览器中正确测量 'vh'？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59068919/