我试图根据媒体设备为我的描述显示设置稍有不同的行为，但是有麻烦。在移动设备上，我希望描述显示在菜单项之间，而在桌面设备上显示在底部。在代码的这种排列中，它可以在移动设备上运行，但拒绝显示桌面信息。我确定我做了一些愚蠢的事情，但无法弄清楚它是什么。我已经尝试了多种方法来完成一项或多项工作，但从未做到。我是一个菜鸟，有点迷茫，感谢任何建议。非常感谢您提供的任何提示。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Services</title>
</head>
<style>/* Change Button Size/Border/BG Color And Align To Middle */
.services {
width:210px;
height:135px;
padding: 0px;
border:0px;
outline:0px;
cursor: pointer;
color: #999999;
font-size: 20px;
text-align: center;
background: url("https://i.ibb.co/G5mn9nY/Services-Buttons-Combined-Big.png") no-repeat; /* As all link share the same background-image */
}
/* Set Mouseover Button Text and Current/Active Color */
/* EDIT */
.services:focus, .services:hover, .services.active {
color: black;
}
/* Position Button Text*/
divtext {
position: relative;
top: 90px;
}
/* Div Wrapper to format button areas. */
.servicesbuttonwrapper {
display: flex;
flex-flow: row wrap;
justify-content: space-around;
}
/* Div Wrapper to format revealed description text. */
.servicestextwrapper {
text-align: left;
margin-left: 100px;
margin-right: 32px;
top: 50px;
position: relative;
}
/* Div Wrapper to format revealed description text. */
.mobileservicestextwrapper {
display: block;
text-align: left;
margin-left: 40px;
margin-right: 40px;
position: relative;
}
/* Change Image rollover position depending On Focus. */
.assets {
background-position: 0 0;
}
/* EDIT */
.assets:focus, .assets:hover, .assets.active {
background-position: 0 -135px;
}
.viz {
background-position: 0 -270px;
}
/* EDIT */
.viz:focus, .viz:hover, .viz.active {
background-position: 0 -405px;
}
.software {
background-position: 0 -540px;
}
/* EDIT */
.software:focus, .software:hover, .software.active {
background-position: 0 -675px;
}
.more {
background-position: 0 -810px;
}
/* EDIT */
.more:focus, .more:hover, .more.active {
background-position: 0 -945px;
}
/* Hides intitial button descriptions. */
#assets, #viz, #software, #more, #mobileassets, #mobileviz, #mobilesoftware, #mobilemore {
display: none;
}
@media screen and (min-width: 435px) {
.mobileservicestextwrapper {
display:none !important;
}
}
@media screen and (max-width: 435px) {
.servicestextwrapper {
display:none !important;
}
}
</style>
<body>
<!--Div wrapper so we can format positioning of buttons in CSS-->
<div class="servicesbuttonwrapper">
<!--Base buttons plus javascript functions for click behavior. This used to be <button class> instead of <a href> but I read somewhere this is better... seems to work ok.-->
<a href="javascript:void(0)" id="defaultstate" onclick="show('software');" class="services software"><divtext>INTERACTIVE SOFTWARE</divtext></a>
<div class=mobileservicestextwrapper id="software"><p>Interactive Software Desc.<p><br></div>
<a href="javascript:void(0)" onclick="show('assets');" class="services assets"><divtext>3D ASSET CREATION</divtext></a>
<div class=mobileservicestextwrapper id="assets">3D Assets Desc.<p><br></div>
<a href="javascript:void(0)" onclick="show('viz');" class="services viz"><divtext>3D VISUALIZATION</divtext></a>
<div class=mobileservicestextwrapper id="viz">3D Visualization Desc.<p><br></div>
<a href="javascript:void(0)" onclick="show('more');" class="services more"><divtext>IMAGE CREATION</divtext></a>
<div class=mobileservicestextwrapper id="more">And More Desc.<p><br></div>
</div>
<!--Base description text.-->
<div class="servicestextwrapper">
<div id="assets">3D Assets Description.</div>
<div id="viz">3D Visualization Description.</div>
<div id="software">Interactive Software Description.</div>
<div id="more">And More Description.</div>
</div>
<!--Javascript function to hide/show elements based on button press.-->
<script type="text/javascript">
/* EDIT */
function show(elementId) {
document.getElementById("assets").style.display = "none";
document.getElementById("viz").style.display = "none";
document.getElementById("software").style.display = "none";
document.getElementById("more").style.display = "none";
document.getElementById(elementId).style.display = "block";
// get a list of the buttons with ".services" class
const buttons = document.querySelectorAll(".services");
for(let button of buttons) {
// remove ".active" class
button.classList.remove("active");
}
// add the active class to element button specified by argument
document.querySelector("." + elementId).classList.add("active");
}
</script>
<!--Javascript function to set first button as focus.-->
<script>
window.onload=function(){
document.getElementById("defaultstate").click();
};
</script>
</body>
</html>您使用id查找元素的问题。 document.getElementById（）仅工作一次，这意味着它将仅返回页面中具有您找到的ID的第一个元素。因此，在代码中，您为dekstop和mobile使用相同的ID。例如：“ viz”，“资产”等。
我对您的建议是使用类或使ID在移动设备和Dekstop之间唯一。
尝试更改CSS媒体查询。
@media only screen and (min-width: 435px) {
.mobileservicestextwrapper {
display:none !important;
}
}
@media only screen and (max-width: 435px) {
.servicestextwrapper {
display:none !important;
}
}